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T353 Service Manual HST

1. 40 6cm rev 2 48 in3 rev Displacement engine at 2700 rpm 109 7L min 28 99 gpm TORQUE SPECIFICATIONS Pump to back plate mounting Cap Screws 37 42 N m 27 31 lb ft Motor to Back plate mounting Cap Screws 10 14 N m 87 123 Ib in Forward and Reverse pressure Relief valve 135 149 N m 100 110 Ib ft Charge pressure Relief Valve 37 47 N m 27 30 lb ft Charge pressure Diagnostic port plug 13 16 N m 115 142 Ib in Pump side Passage Plugs on back plate 13 16 N m 115 142 Ib in Motor side Passage Plugs on back plate 28 33 N m 21 24 lb ft Transmission to tunnel Mounting Screws 126 154 N m 95 115 lb ft Tunnel to flywheel housing 126 154 N m 95 115 Ib ft Tunnel to rear transmission housing 126 154 N m 95 115 Ib ft SCV pressure Tube to pump 55 79 N m 40 59 lb ft SCV pressure Tube to SC 55 79 N m 40 59 lb ft SCV Work port Tubes
2. 2 0 mm 0 3 mm 0 078 0 015 in Spring pin in Back plate From Back plate to Top surface of pin 4 4 mm 0 017 in HYDROSTATIC PUMP Manufacturer EATON Type piston pump IModel 77122RAA Displacement Variable maximum revO 40 6cm rev 2 48 in3 rev Displacement Engine at 2700rpm 109 7L min 28 99 gpm Pressure relief Valve setting 41368 kPa 6000 psi HYDROSTATIC MOTOR Manufacturer EATON pe Fixed displacement Axial piston Motor Displacement Fixed
3. 1 14 SECTION 1 TRACTOR TYPES AND PUNCHED IDENTIFICATION MARKS 1 15 SECTION 2 SPECIFICATIONS 1 17 SECTION 3 GEAR TRAIN DIAGRAMS 1 20 SECTION 4 PRECAUTIONS FOR TRACTOR OPERATIONS 1 21 1 INSTRUMENTS 1 21 2 CONTROLS 1 23 3 FILLING DIAGRAM AND CAPACITY TABLE 1 24 4 MAINTENANCE CHART 1 25 Chapter 1 Introduction A This tractor Workshop manual is for qualified service personnel engaged in servicing and overhauling T303HST T353HST tractor Use of this publication is not recommended for field operators since they usually do not have access to special tools and shop equipment essential for most servicing Servicing procedures outlined herein contain sufficient information to return all component parts of a tractor to new condition In discussion of each component parts it is assumed that a complete overhaul is been performed consequently complete disassembly and reassembly are outlined The mechanic is relied upon to decide how far disassembly must be carried when complete overhaul is not required Stud y unfamiliar service procedures thoroughly and clearly understood before attempting disassembly Specific data essential for proper overh
4. 9 22 4 4 Operation 9 22 SECTION 5 SERVICE INSTRUCTION 9 25 SECTION 6 TROUBLESHOOTING 9 27 Chapter 9 Hydraulic system SECTION 1 GENERAL DESCRIPTION The hydraulic system is composed of a gear pump valves oil filter cylinder actuator piping etc The implement lift is operated by a control valve which is actuated by the control lever through a link mechanism ON and OFF of the PTO is controlled by a hydraulic wet multi disc clutch whose circuit is opened and closed by an electromagnetic valve in the flow divider The construction and circuit of the hydraulic system are shown in Fig 9 1 and 9 2 Cylinder Position control V V Oo Remote hydraulic control V V t Sub control valve Safety valve Adjusting Knob PTO valve Assy Main Slow return control V check V V PTO valve Pressure Relief Ivalve control Gear Pump Suction filter I 7 PTO clutch l ZN i i Fig 9 1 hydraulic system construction 9 1 SECTION 2 SPECIFICATIONS Piston and cylinder Lift kgf At lower link top end Cylinder port leaks cc min Control Valve Under a pressure of 9800kpa 100 kgf cm 10 With gear oil SAE 80W 0 610 cu in Cracking pressure Kgf cm 12 Main relief valve Relief pressure kgf cm 145 Delivery 91 efficie
5. 4 15 4 Hydraulic system bleed procedure 4 16 SECTION 7 REPAIR 4 17 1 Tractor splitting Front 4 17 2 Hydrostatic transmission removal amp installation _ 4 23 3 Hydrostatic transmission disassembly 4 24 4 Hydrostatic pump disassembly 4 26 5 Hydrostatic pump inspection 4 29 6 Hydrostatic pump assembly __ 4 30 7 Hydrostatic Motor disassembly 4 32 8 Hydrostatic Motor assembly _ 4 35 SECTION 1 SPECIFICATIONS General Hydraulic Reservoir Capacity 350 9 24 us gal Pump or motor Roller Bearing From back plate to Top surface of bearing 2 3 mm 0 2 mm 0 090 0 010 in Roller Bearing in Motor Housing Recess From Top of Counter bore
6. 11 1 1 Engine accessories 11 1 2 Clutch dampet 11 2 3 Transmission 11 2 4 Front axle 11 3 5 Rear Axle 11 4 6 Power steering system 11 4 7 Hydraulic system 11 4 8 Electrical equipment 11 7 SECTION 2 TIGHTENING AND STARTING TORQUE SPECIFIED FOR PARTS 11 10 SECTION 3 CONVERSION TABLES 11 11 CHAPTER 11 Service standards and other information SECTION 1 SERVICE STANDARDS Part names and Nominal Standard value Usable limits Service instructions inspection items dimensions for reassembly and remarks 1 ENGINE ACCESSORIES CHAPTER 3 1 RADIATOR Coolant capacity 2 Radiator alone Radiator cap valve operating pressure 0 9 0 15kef cm 2 AIR CLEANER Element capacity Maker Donaldson Model FPG 057512 Dual element Filtering efficiency 99 9 or more Temperature 30 80 C OUTER ELEMENT 1 Clean or wash the element after 100 hours of operation Replace a damaged on or one which has been used more than 500 hours a Cleaning when dust is dry Apply compressed air of 7K gf cm or lower to t
7. wu Tit ay E Ej UJ cauru TO ES Lis el TPANELI AR FSIE L GROUDIHOOD FRAN TN E TURN SIGNAL 6 eMe TAIL AP TENDER RH lt Y haat b T TRAILER SOCKET Y Y s y FUSIBLE LINK a HEADL IGHT LH FLW 0 5 GREEN E SIL gd an HELL ed es Tr L mnd EEE ne e EHE E zy DT mem a wa H CER Du WES o 3 TE ao FUSIBLE LIM FEE BLUE BLUE lil 1L_ TURN son p 5 uen RATE TAIL Lap ENDERL 5 th E BU EH ne salen Jy Om TURN SIGNAL H REAR DIOEGM ED STOP LAMP ci iced OIE MOET lp 10 14 SECTION 7 TROUBLESHOOTING Important Whenever effecting a repair the reason for the cause of the problem must be investigated and corrected to avoid repeating failure The following table lists problems and their possible causes with the recommended remedial action 1 LIGHTING SYSTEM Problems Several or all lights do not illuminate Individual lights do not illuminate Lights burnt out repeatedly Turn signal lights do not illuminate Causes Discharged battery Loose or defective battery cable connection Loose wire harness connectors Burnt out fuse or fusible link Faulty wiring Defective light switch Several light bulbs burnt out due to defective voltage regulation Burnt out bulb Defective or corroded bulb contact Burnt out fuse Loose or broken wires Poor ground connection Faulty voltage regulator Blown
8. 6 13 SECTION 4 TROUBLE SHOOTING 6 15 Chapter 6 Front axle 4WD 1 GENERAL DESCRIPTION The 4WD front axle is a center pivot type The front wheel drive mechanism is incorporated as a part of the axle The front wheel drive power is taken off the rear transmission and transmitted to the differential in the front axle where the power is divided into right and left and to the respective final cases In the final cases the transmitted revolution is reduced by the bevel gears to drive the front wheel The 4WD mechanism with bevel gears provides wider steering angle and greater durability ats PGC a PHA 3 A de 1 1 t Ba EO E uw Iu pw Fig 6 1 i i i i i i 1 SECTION 2 SPECIFICATIONS ce Wheel alignment 6 2 SECTION 3 DISASSEMBLY INSPECTION AND REASSEMBLY 1 CENTER PIVOT 1 Housing front axle 2 01l cap 3 Plug 4 connector 5 Hose 820 6 Clamp worm 14 5 8 Metal pivot R 9 Bush 75X80X30 Fig 6 3 10 Bolt M16X40 11 Washer spring M16 12 O ring P 13 0 ring 14 Spacer R 16 Metal pivot F 17 Bush 50X55X20 18 Spacer F 6 3 19 O ring G 55 20 Bolt 2 Nut 22 Seal washer 23 Bolt M12X40 24 Washer spring 25 Washer 1 1 DISASSEMBLY 2 FRONT AXLE BUSH BORE DIAMETER 1 Dismount the front wheel drive shaft Measure the bore diameter of the roll referring to the pertinent paragraph in chapter 2 bush in the pivot me
9. Gear Fig 9 19 Front and rear pump 2 Install the front pump with rear pump 3 After installing the cap ring and O ring to the front pump and install the rear pump Rear pump Cap ring O ring Front pump Fig 9 20 Drive gear gear Gasket 9 12 4 Tightening sequence and torque of the pump cover tightening bolts gt Tightening torque 2 5 2 8kgf m Fig 9 21 Cover bolt Install the oil seal snap ring and key Key CD Oil m Snap ring Fig 9 22 Oil seal snap ring key The gears should turn smoothly with a turning torque of less than 30 kgf cm 2 2ft 1bs Fig 9 23 Inspection after reassembly 4 INSPECTION AND REPAIR 1 Check all disassembled parts for damage and wash undamaged or usable parts in clean diesel fuel or kerosene except rubber parts Inspect all parts referring to these points and repair or replace defective parts 2 Housing casing DThe gear pump is originally designed so that the gears come into light contact with the side of the pump body 2 Therefore some evidence of contact can be found around the intake port of a pump once used 3 The normal contact tracing is less than half the length of the gear housing bore and less than 0 05 mm 0 0020 in in width If width A is more than 0 1 mm 0 004 1n replace the gear pump set Outlet Qutlet Limited width Fig 9 25 Housing casing 9 13 3 Bushing D With clean working fluid surfaces a
10. SECTION 1 GENERAL DESCRIPTION 9 SECTION 2 SPECIFICATIONS 9 2 SECTION 3 MAJOR COMPONENT OF THE HYDRAULIC SYSTEM 9 3 1 Hydraulic system 9 3 2 Flow divider 9 4 3 Flow control valve Slow return check valve 9 7 4 Safety valve main relief valve 9 9 5 Gear pump 9 10 6 Filter 9 15 SECTION 4 REMOTE HYDRAULIC CONTROL 9 16 1 Remote hydraulic control valve optional 9 16 SECTION 5 HYDRAULIC SYSTEM 9 17 1 Hydraulic cylinder 9 17 2 Linkage Internal 9 19 3 Linkage External 9 20 4 main control valve 9 21 4 1 General description 9 21 4 2 Specifications 9 21 4 3 Construction
11. This valve is composed of the spool and spring When the solenoid 1s switched on the spool is moved to the left by overcoming the spring force and allows the fluid from the pump to flow from port P to port B through the fixed orifice 9 4 When the solenoid is switched ON y The fluid from the pump flows to port B through port P the pressure reducing valve and the changeover valve The pressure of the PTO clutch circuit and that of passage 2 are the same and will be set as P2 The pressurized fluid acts on the left hand side of the valve passing through port its pressure will be set as P4 As passage 1 and passage 2 are interconnected then P P The force imposed upon the left hand side of the valve is P1 whereas the force imposed upon the right side of the valve is P1 plus the spring force Consequently the spool is pushed leftwards Here port A 1s blocked so the fluid from the pump is branched off to the PTO clutch T Pressure E control Valve 9 Fig 9 4 1 Passage 1 2 passage 2 3 Pressure reducing valve 4 Changeover valve 5 PTO clutch 6 To control valve 9 5 When the solenoid is switched OFF The fluid in the PTO clutch is unloaded to the bank through port B Consequently pressure P2 at passage 2 becomes zero whereas the pressure at passage 1 is P1 Then the force imposed upon the left side of spool Pl overcomes the force imposed upon the right side P2 spring force so that the spool
12. doors em all AR a Lor i z CZ T F Ez Jum i Pe CDS A A CS INL AS a SN ASAS nr 2 EE ep A q E A V rmn pee fe i a a J 7 Dl ES A f f gt pa Hitt ae E 1 TE MW f EE 7 ram Tn 7 uy Yi il s 5 15 3 1 DISASSEMBLY Separate the spacer transmission and the rear transmission from each other and then remove the hydraulic cylinder case referring to paragraph 7 1 of SECTION 4 SEPARATION OF MAJOR COMPONENTS in Chapter 2 1 Ring gear Drive pinion and related parts DAA 935 das SOA a s TP 1 Mid PTO case 2 Pinion drive 10 3 Pinion wheel IOLH 4 Case Brake LH 5 Arm brake 6 Case brake 7 Pinion wheel IORH 8 Metal brake RH 9 Metal brake LH 10 Plate separate 11 Plate brake 12 Bolt Diff 13 R B B 6011 14 Case RH Diff 15 Gear bevel 20T 16 Collar 17 Pinion Diff12 18 Shaft pinion D1ff 19 Collar 20 Gear bevel 51 21 Plate lock 22 R B B 6011 5 16 a Disconnect Mid PTO case by loosening bolts amp Pull out diff pinion shaft 18 and take out dif pinions 17 and dif side gears 15 g Remove the pinion metal support tightening bolts and take put drive pinion and related parts as an assembly The number of installed shims should be written down or memorized for later reference Do
13. 4 When assembling the Rod comp It should go through the hole 5 11 3 Forward and reverse arm assembly Fig 5 20 1 Arm comp 2 Bearing 608 3 Bolt 4 Washer plain 5 Nut 1 when assembling the forward and reverse arm to pin be sure to apply grease 2 Snap ring should be seated securely in it s groove with the press processed side turned towards the outer side 3 Full grease after assembling the nipple 1 Install Ball bearing carefully so as not to damage to them 2 Install the switch on the Pin 3 When assembling the cam comp to the pin be sure to apply grease 4 Snap ring should be seated securely in it s groove with the press processed side turned towards the outer side 5 Full grease after assembling the nipple 6 Be sure to check the spring has enough tension 5 MID PTO STOPPER ASSEMBLY as m B n 4 E E de I ra a has lj a 5 A f E dm HA AB m S EE eh MT S MID PTO Lever 9 Bracket comp actuator Washer spring 3 Nut Bolt 5 Washer spring Actuator con Elbow 8 Hos PTO 9 Adapter l 2 4 6 7 5 13 6 MID PTO STOPPER OPERATION MID PTO LEVER OFF MID d SWITCH ON Fig 5 22 D When PTO switch is ON at engine works The hydraulic fluid of PTO Valve flows to PTO clutch through hydraulic pipe and let PTO shaft rotate which is engaged to Gear 16 23 2 The fluid flows to actuator and piston operates to pr
14. Front Transmission Space transmission PTO Clutch Rear Mid PTO gears 0 transmission Ring gear Cylinder case Differential gear Brake case E Rear PTO gear Valve system 5 eBrake Control linkage Diff Lock RH ePiston and Arm 2 4 Center pivot e Final case Differential gear eMuffler eFlow Divider HST control linkage eSpeed range gears Drive pinion Rear Axle Housing e Final gear Wheel shaft SECTION 3 SEPARATION OF MAJOR COMPONENTS 1 SEPARATION OF THE FRONT AXLE AND AXLE BRACKET Parts which can be inspected during This operation Center pivot Final case Differential gear 1 Removal 1 Hold the front hitch or the front bracket securely with a crane or stands 2 Support the front axle with a jack 3 Remove both right hand and left hand tie rods 4 Remove the pivot metal bolts 5 Remove the front axle assembly forward FIG 2 4 Front axle Note When working on the 4WD version the drive shaft should be removed ahead of time FIG 2 5 Drive shaft 2 Installation 1 Install the front axle assembly 2 Install both pivot metals supports FIG 2 6 Front axle Note Apply grease to the bushing and fill the oil seal with grease ahead of time Install the oil seal carefully not to allow its lips to turn over 3 install both of the right and left tie rod 2 5 2 SEPARATION OF THE ENGINE AND THE FRONT AXLE BRACKET Parts which can be insp
15. ogg sa uer mer mal ees ase mse mes mas 3 568 806 80 784 560 704 367 804 174 813 981 823 788 833 595 843 402 853 209 863 016 872823 80 or cae so eee ee ca ce ee ee ee ee 10 10197 11217 12236 13256 14 276 15296 16 315 17385 18355 19 374 10 30 30 591 31 611 326801 33650 34670 35 690 36 709 37729 38749 30708 so 41 808 42 827 43 847 44867 45 807 46 900 47 926 48 946 49965 40 50 i l i i i 50 60 61182 62202 63 221 64 241 65 261 66281 67 300 68 320 69 340 70300 eo 11 15 jPressure Pounds per square inches to Kilograms per square centimeters lt bimtPs o 1 2 4 5 6 7 8 9 lip inzPsD Kg cm ko cm2 Kg cm2 Kg cm2 Kg cm2 Kg cm kg cm2 Kg cm Kg cm2 Kg cm 0 0000 a 20 40 4 2186 5 6248 90 6329 6 3982 6 4685 65388 eso ee79s 67498 6 8001 eeeo4 eeo7 eo 711 15 60 85338 sezeo ee183 gg605 91027 92450 93872 95294 96716 98139 60 80 113784 115206 1166 29 118051 1194 73 1208 96 1223 18 1237 40 1251 62 1265 85 geo Kilograms per square centimeters to Kilo pascal 3 4 5 6 7 8 o kgem ka Ka ka ka ka Ka ka Ka Ka Ka 0 ool eeil tge1 2942 soma 4904 sega ees ze46 8826 ol 20 860 Kg cm Kg cm2 Kg cm Kg cm2 Kg cm Kg cm Kg cm Kg cm Kg cm2 kg emo 0 000 10 197 11 16 Tor
16. 4 Washer plain 42 Pin snap 43 pedal comp forward 44 Bolt 45 Pedal comp Reverse 46 Pad 47 Bolt Er 1 IE l LEE E E Apply heat proof grease Fig 5 40 2 range shifter Speed range shift 1 Fork range Stay range shift Spring shifter Ball steel E ring Hook range O ring P o ANY QN a A Q WN Plate 9 Bolt M8X16 10 Washer plane 11 Arm sub range 12 Pin Taper split Note The bottom two tightening bolts should be coated with an adhesive on their threads before being tightened Fig 5 41 5 25 3 Front drive change 4 WD shaft mechanism 1 Shaft 4WD drive 2 Gear spur 28T 3 C ring shaft 4 Bearing ball 6204 5 Bearing ball 6004 6 C ring hole 7 Oil seal 8 Boss 9 Spring shifter 10 Ball steel 11 Arm comp 12 0 ring P 13 Arm comp shift 14 pin 15 Bolt M8X20 Apply adhesive TB 1215 Neutral position Apply heat proof grease Fig 5 44 5 26 4 Rear PTO mechanism diz T lil MT j aj naa LI m t Ps Ld e acm E i E A E E r x CLE e Fa li El E ea an Le Shift stay O ring Apply Grease Lt A E a 1 i I aed ae fo Smet m i M E 5 E j LL me d No n xs Caii DEA i Los e TT M il RH 4 95 PU w TO Apply grease f I 1
17. 75 29528 100 3 9370 7 8 Pisce ETT y isso EE NEN NEM O ae COMA EE NN azea EN NEN PE NEN LL EA NEN NEN 3 8 ao oss 1570 20246 11 11 Feet to Meters q 0 0000 0 5050 0 6700 0 9750 12200 15260 isxo 21880 24400 2 7450 0 10 8 0532 3 3550 3 6600 3 9650 4 2700 45750 48800 5 1850 54900 57950 10 30 60 73 3354 18 6050 18 0100 19 2150 19 5200 19 8250 20 1300 20 4350 207400 210450 60 90 112 5047 27 7550 28 0600 8 3650 28 6700 28 9750 29 2800 29 5850 29 8900 301950 90 Meters to Feet m o 1 2 3 4 5 6 7 8 9 m 0 0 0000 32808 6 5616 98424 13 1232 16 4040 19 6848 22 9656 26 2464 29 5272 o 80 262 4640 265 7448 269 0256 272 3064 275 5872 278 8680 282 1488 285 4206 288 7104 291 9912 80 90 295 2720 298 5528 301 8336 305 1144 308 3952 311 6760 314 9568 318 2376 321 5184 3247002 90 Mile to kilometers miles C miles 10 16090 17699 19308 20 917 22 526 24195 25744 27358 28 982 sos71 10 50 50 60 96 540 98 149 99 758 101 367 102 976 104 585 106 194 107 803 109 412 111 0023 60 80 128 720 130 329 131 998 133 547 135 156 136 765 138 374 139 983 141 592 143201 80 a 6000 ost 122 106 2080 3105 or 487 4665 ssw 0 60 37260 3
18. B type Fig 10 23 Socket No Description Specification Wire Housing ms cra v o9 ovis 3 O sonm we x owes 3 j Lamp on the trailer should be of the same size or smaller than those on the trailer 10 11 SECTION 5 EARTHING POINT Fig 10 24 2 Contact surfaces of the Hood frame and 1 Fuel tank guard RH bracket where they tightened together Earthed at tapped hole in the lower the working lamp Fig 10 25 10 12 Fig 10 26 Hood frame 3 Right surface of the frame comp Where the battery cable is to be installed Fig 10 27 Battery cable 10 13 SECTION 6 WIRING DIAGRAM HAZARD SWA GLOW TIMER FLASHER UNIT EH CRUISE LANP RELAY ODO ona mE Mid aaa ma a ii OT gem eji aug 3 LT th E i lI ht iD Lt JD INSTRUMENT ELO 9 30 17 50 BR AC o cess AM ME oen p o y INSTRUMENT R IA el TE m 3 po 7 SSSI UN DODODODODODOO x mE UAT ill Wm tt as Anr qy D D EMIT SH a a ll Will 0 fc TRUN SIGNAL STOP LAMP RH REAR SINT E Nm E tH Da m 2 ENGINE STOP VALVE zzz BB AEST em COMBINATION m TT a A TEMP I B Es M MASTER BRAKE S W j SENSER OIL PRESSRE ain WORKING LAMP e Q SENSER GLOW PLUG INTERUPTER ij LE a Q
19. Check flex plate coupling between engine and pump Hydraulic level low in transaxle Low charge pressure see Tests and Adjustments Section Main drive pressure relief valve stuck open see Test amp Adjustments section Air in system see HYDRAULIC SYSTEM BLEED PROCEDURE on page 20 Hydrostatic motor output pressure too low see tests and Adjustments section Internal pump or motor damage or excessive wear Parking brake engaged or malfunctioning Pump centering mechanism not properly adjusted Gear box malfunction see gear power Train section Servo valve malfunctioning Pedal neutral position Not properly Adjusted Hydrostatic Control linkage Worn out or Damaged 4 10 SECTION 4 DIAGNOSTICS Test conditions Operator in seat Key switch in RUN position TVCheck poini IF No normal 1 Control pedals Pedal should move freely Check linkage from pedals to pump Test conditions Start engine and run at slow idle Test Check point Normal If Not normal 2 Directional pedals are Machine should not creep Adjust centering of pump control in neutral position forward or backward pedals 3 Move forwards or Machine should accelerate Check fluid reservoir for proper reverse pedal slowly smoothly forward or fluid level backwards Check hydraulic tubing and connections for leaks from neutral to maximum travel speed Perform system flow and pressure checks to verify proper operatio
20. SAE30 or 15W 40 0 C to 25 C 32 F to 77 F SAE20 or 10W30 Below 0 C 32 F SAE 10W or 10W 30 Gear oil 80 or 90 API GL 4 grade Ce cea ess sa 8 FUBLTANK Dieslfuel SUB TITUS gal Tire size and inflation TABLE 1 8 DIVISION SIZE Air pressure Mpa PSI MODEL 7 16 4PR 0 176 Mpa 25 53 PSI RI Ag 11 2 24 8PR 0 235 Mpa 34 08 PSI 8 16 4PR 0 176 Mpa 25 53 PSI R1 Ag 12 4 24 6PR 0 176 Mpa 25 53 PSI T303HST nas 27X10 50 15 8PR 0 380 Mpa 55 11 PSI T353HST n 12 5 20 R4 12PR 0 340 Mpa 49 31 PSI 27X10 SOLL 15 6PR 0 220 Mpa 31 91 PSI R3 Turf 41X14 00 20 RL 0 170 Mpa 24 66 PSI 1 24 4 MAINTENANCE CHART inspection replenish and adjustment Replacement A Cleaning and or washing ENGINE Consult your Dealer Inspection and servicing intervals Hour of operation X10 on hour meter 5 1 1 2 2 3 3 0 5 0 5 0 5 i 1 Judgment Inspection items Intervals after that criteria Oil filter Air cleaner Radiator coolant mm in Replace after every Level is between 100hours upper and lower Clean after every 100hrs Replace element that has been washed more than 5 times Replace every year Fill coolant up to radiator throat Clean cooling fins and cores Everyday and before Tank should be full work Wash after every 100hrs and replace after 300 hrs About 5 0 20in deflection pushed with a finger Radiator Radiator fin amp
21. SECTION 1 SPECIFICATIONS 4 1 1 Special or essential tools 4 2 2 Other materials 4 2 SECTION 2 COMPONENT LOCATION 4 3 1 Hydraulic hoses and lines 4 3 2 Hydrostatic transmission 4 4 3 Transmission main pump Case 4 5 4 Transmission back plate and motor 4 6 5 Hydrostatic control linkage 4 7 6 Hydrostatic system schematic 4 8 SECTION 3 TROUBLE SHOOTING 4 10 SECTION 4 DIAGNOSTICS 4 11 SECTION 5 THEORY OF OPERATION 4 12 1 HYDROSTATIC SYSTEM 4 12 SECTION 6 TESTS AND ADJUSTMENTS 4 13 1 Hydrostatic pedal and neutral adjustment 4 13 2 Hydrostatic pump pressure test 4 14 3 Charge pump pressure test
22. Z Apply adhesive i TB1901 E Fig 5 5 5 5 2 MID TRANSMISSION 1 PTO INPUT GEAR SUB ASS Y 1 Gear helical 21T 2 Bearing Ball Fig 5 6 1 Pay attention to the direction of installation and check to see all the parts turns smoothly 2 When pushing the RBB s 6205 in to the gear be careful only to push their inner races 3 When installing the PTO Clutch assembly Apply a thin coat of grease to the seal rings and install it taking care not to damage these rings 4 When installing seal rings Apply fresh oil ahead of time and install them carefully so as not to damage them 2 PTO counter shaft comp 1 Shaft PTO counter 2 Gear Helical 32T 3 Bearing Ball 4 Bearing Ball 1 When pushing the RBB s 6205 in to the gear be careful only to push their inner races 2 Pay attention to the direction of installation and check to see all the parts turns smoothly 5 6 3 PTO CLUTCH 3 1 DISASSEMBLY A inci ll uii Fig 5 8 1 Shaft PTO clutch 2 Bearing ball 6203 3 Collar 26x35x03 4 Bearing ball 5 Gear helical 35T 6 Bearing ball 7 Clutch ass y PTO Note Disassembly of the PTO clutch assembly should be done in a clean dust free place Exercise special attention to avoid damage of the seal rings etc a Pull out PTO drive shaft rearwards b Pull out PTO drive gear forwards c Remove snap ring D95 for hole and take bake up plate disc assembly and driving e Disassemble into sep
23. ozesg oss oete4 oeze l 1osza 1 0885 1sesl io of 12205 12815 13426 1 4036 14646 15256 15867 16477 17087 17697 20 Ot 18308 1898 19528 20138 20749 21369 21969 22579 2319001 2380 sad 2 4410 30513 31123 31733 32343 32954 3 3604 34174 34784 35395 36005 so 3 6615 4 2718 4 8820 5 4929 90 11 13 Volume eallons US toliterw usgal o 2 3 4 s s 7 Te usga tes f cms f oiee lie oes L oee Les f uee IEEE 0000 C 0 37854 41639 45425 49210 52996 56781 eosee 64352 68137 71 923 10 2o 75 708 105 991 a AI 70 sol 302832 306617 310403 314188 317974 s217s9 325544 370 330 333115 336 901 80 _ liters to Bal US OA CT a um CT usa ACT CT ua CT NT NR 0 000 7 133 80 21136 21400 21664 21 9 9 22193 22457 22721 22985 23250 23514 ed a Gallons IMP to Liters Ap M Hie titers 9 juega lo trop 2 A ESA MA ep m tip rs ira Llc lum mel e i e a 3 ETA A lol oooOO 45460 90920 13 6380 18 1840 227300 272760 31 8220 36 3680 40 9140 no 20 909200 954660 1000120 104 5580 109 1040 113 6500 118 1960 122 7420 127 2880 131 8340 zo 218 2080 222 750 40 sol 227 3000 zseeo goaeap ose0 245 4840 250 0000 254 5760 280 1220 9830880 zentso so gol 363 6800 368 2260 372 7720 377 3180 381 8640 386 4100 390 9560 395 5020 400 0480 4045940 sol fp
24. 0 004 0 008 in 5 Apply oil to the housing ahead of time to install the mechanical seal 6 Be sure that the length of shaft 8 1s 192 mm 7 Tighten the bolts to the specified torque Tightening torque 130 180Kgf cm 8 Adjust backlash between gear bevel 38 and gear bevel 11 9 with collar 10 Back lash mm in 0 1 0 2 0 004 0 008 in 9 Apply an adhesive to the Cap 90 and be sure not to deform when installing Note Refer to Fig 6 23 FINAL DRIVE CASE AND HOUSING STEERING CYLINDER 1 When installing the shaft Be sure that the gears are not damaged 2 Be sure the differences between the LH and RH shaft Fig 6 30 1 When installing the steering cylinder Be sure that the rods are not damaged 2 Install the pin 2 before assembling the cylinder 3 Apply an adhesive Lock tite and tighten the bolts to specified torque Fig 6 29 Tightening torque 900 1100 Kgf cm 4 Apply an adhesive lock tite to the ball joint 7 and tighten the ball joint to specified torque _ Tightening torque 1300 1500 Ketcm _ se is IUD SS Tightening torque 1600 1800 Kgf cm 5 Be sure to bend the split pin 5 after installing the ball joint 3 Tighten the bolts to specified torque 6 14 SECTION 4 TROUBLE SHOOTING PROBLEMS AND PROBABLE CAUSES COUNTERMEASURES 1 Too low tire inflation Inflate to specified value 2 Broken thrust bearing Replace 3 Stuck or broken ball joint of tire rod end Gr
25. 3 Place range shift lever in LOW gear Tractor should not move If tractor moves note direction and adjust neutral return lever as follows 6 loosen the locking nut that holds the rod and the elbow to the transmission a CAUTION 7 Using a wrench Turn the rod to move the rod down to eliminate reverse or up to SEVERE INJURY OR DEATH CAN RESULT E IF ENGINE IS NOT SHUT OFF WHEN eliminate forward movement PERFORMING NEUTRAL ADJUSTMENT 3 Tighten the elbow and the nut 9 start engine and run at low idle 10 Place range shift lever in LOW gear Tractor 4 Shut engine OFF engage park brake 5 On the right side of the tractor below the forward and reverse control pedals locate the rod The rod must be turned to perform the neutral adjustment should not move If tractor moves repeat steps 4 through 11 until movement is eliminated d e n es VARAS t ES ae N Sh ow use VN e ENS 9 ud ty e o A y M e A Ne v 1 a 4 OJ oy S PS Vx az a Rae A RR M y aet e Lo NOS WE HOLDER 4 13 2 HYDROSTATIC PUMP PRESSURE TEST Reason To ensure that internal parts of the hydrostatic pump are not worn excessively and the relief valves are operating properly Equipment JT03362 68947KPa 10 000 psi Gauge JT03364 Hose with quick coupler JT03240 7 16 20M 37 X7 17 20 F 37 Elbow J103264 Quick coupler F7 16 20 F 37 Adaptor JT05480 Quick coupler MXM14 1 5 ORB Adapter IMP
26. AE sS LII male A Apply adhesive TB1215 d Ry A gt 0 Fig 5 45 Gear spur12 2 R B B 6305 3 C ring shaft 4 R B B 6205 5 Gear spur 14 6 C ring shaft 7 C ring hole 8 Seal 62 9 Shaft PTO 10 C ring shaft 11 R B B 6205 12 Gear spur 37 13 Collar 35X50X2 14 R B B 6207 15 C ring hole 16 01l seal 17 Cover 18 Bolt 19 Hook rear PTO 20 Lever rear PTO 21 Stay PTO shift 22 Shifter PTO Low speed Fig 5 47 5 27 REAR PTO counter shaft Fig 5 48 l Gear spur 12 2 Gear spur 14 3 Snap ring shaft 4 Ball bearing 6205 5 Ball bearing 6305 Note When pushing the R B B s 6305 6205 into the gear spur 12 be careful only to push their inner races The snap ring C should be securely seated in the groove and the press processed side turned towards the outer side Be sure not to mix different pairs of the gear spur 14 Every time a gear is installed its smooth rotation should be checked REAR PTO shaft Shaft PTO 2 Snap ring Fig 5 49 Note The snap ring C should be securely seated in the groove and the press processed side turned towards the outer side REAR PTO shift stay 1 Stay PTO shift 2 0 ring Fig 5 50 Note When installing the O ring to rear transmission case take care not to damage it or allow to fall 5 28 5 MID PTO 5 1 MID PTO CASE ASSY SP 4 Fig 5 51 1 Case Mid PTO 13 needle roller bearing 24 Bolt 2 plug squ
27. Disc 5 9 4 HST REASSEMBLY OC CO GHIAES A Mt SZ t m ao HEEE JT 1 HST Unit E 2 Pin Hollow IL 3 Case Mid transmission L F F aj 4 Washer spring E YAA 5 6 7 8 Bolt hex i s Fig 5 16 p E Reassemble them in reverse order of disassembly in accordance with the following instruction Installation of clutch damper and related parts 1 When installing the clutch damper on the flywheel be sure to install the cotter pin to flywheel 2 Apply a thin coat of molybdenum disulfide based grease Three bond TB1901 or equivalent to revolving or sliding parts prior to reassembly 3 When installing the clutch damper on the flywheel take care not to damage this clutch damper 4 Apply an ANTI RUST 720S or equivalent after installing clutch damper in order to prevent from rust 5 10 4 1 Forward and reverse 1 HST holder comp I HST Unit 2 Bolt 3 Washer spring 4 Washer plain 5 Holder comp 6 Nut 1 When reassembling holder comp take care directions 2 After installing holder comp be sure not to skip the parts 2 ROD Assembly 1 Install the pin on Mid transmission case 2 Assemble the bolts and Nuts on Mid Se IE transmission case Gap between bolt and nut is WING 2 k A 10mm T ES L 3 Elbow between Mid transmission case and holder should be different direction
28. Fuel gauge and fuel gauge sensor 10 5 1 4 Thermometer 10 6 2 Starter switch 10 6 3 Combination switch 10 7 4 Stop light switch 10 8 5 Relay unit 10 8 6 Fuse 10 8 7 Controller Unit 10 9 8 Trailer socket 7P 10 11 SECTION 5 EARTHING POINT 10 12 SECTION 6 WIRING DIAGRAM 10 15 SECTION 7 TROUBLESHOOTING 10 17 Chapter 10 Electrical accessory and instruments AA A AAA SECTION 1 GENERAL DESCRIPTION The basic electrical system of tractors consists of the engine cranking system battery charging system lighting system meters switches etc For further information concerning the engine cranking equipment and battery charging equipment please refer to the engine manual The battery 1s a power source to activate the engine cranking system lighting system and other electrical equipment The lighting system is used to activate the
29. Gasket sS ure ds lea 3 8 in N C nut lea 1 2 in Drive Socket with 1 1 8 1n OD Hydrostatic pump 6 Place one of the flat washers over the 3 8X 5 in cap screw Install cap screw through spline end of piston block so that the washer rests on the three pins Nut Washer Retaining ring Socket ms P o Rotating assembly 4 Remove the rotating assembly from the housing 5 If the piston did not come out with the piston block remove the pistons along with the spider and pivot Piston Block x 7 Place the socket then the washer over the end of the cap screw 8 Screw on nut and slightly compress the spring inside the piston block 9 Using snap ring pliers remove the internal retaining ring 10 Carefully back off nut until spring tension 1s relieved 11 Remove the nut washer and cap screw Piston Retaining Ring N NOTE Disassembling the piston block assembly is Spring not necessary unless the spring or pins are damaged AA CAUTION The spring inside the piston block is compressed and should not be removed without compressing the spring first Use the following procedure to remove the spring safely Pins Washers 4 27 B retainer 12 Remove washers springs pins and pin retainer Remove three cap screws and shaft end cap 13 Inspect parts for wear or damage Replace if 2 Remove three cap screws and pain end cap needed Shaft removal and Disassembly Internal
30. Install the oil damper assembly 9 Install the forward and reverse pedal 10 Install two rear rubber mounts 11 Install exterior parts 12 Fill the transmission case with oil T353HST 354 2 18 6 SEPARATION OF THE REAR TRANSMISSION AND REAR AXLE HOUSING Parts which can be inspected during This operation Diff Lock Brakes Brake cases Final gears MID PTO gears 1 Removal As both sides can be disassembled in the same way only side with the diff lock installed will be explained here 1 Drain the transmission case of oil 2 Lift up the rear transmission and remove the rear wheel on the diff lock side Rear wheel A FIG 2 52 Diff lock pedal 4 Remove the brake rods 5 Remove the 3 point linkage and related parts pe L M ij FIG 2 53 3 point linkage 6 Support the floor panel with a trestle or the FIG 2 55 Brake like 2 Installation 7 Remove the rubber mount along with the Reassemble in reverse order of disassembly bracket 1 Install the brake LH and RH Rubber mounting bolts 2 Install the the brake case 3 join the rear axle and rear transmission Note Make sure that the diff lock shifter is fitted into the groove in the dif lock metal 4 Reinstall the other removed parts 5 Mount the rear wheel 4 Refill the transmission with oil up to the specified level Level up to fill the oil can be sought from the rear side of rear
31. TO THE OPERATOR Location On FENDER LH Part No 1260 904 070 1A TO PROTECT ENGINE AND HYDRAULIC COMPONENTS 0 TO AVOID POSSIBLE PERSONAL INJURY THIS GUARD MUST BE KEPT IN PLACE Location ON PTO guard Idle Engine for 1 minute before shut down or full load operation Do not exceed 1 2 throttle for first 5 minutes of operation Part No 1260 904 069 0A Location On Dash cover side RH Part No 1260 904 064 0 KEEP HANDS AND CLOTHING AWAY FROM ROTATING FAN AND BELTS TO PREVENT SERIOUS INJURY Location On Radiator bracket side LH amp RH Part No 1260 904 061 0 BEFORE OPERATE THE TRACTOR READ THE OPERATOR S MANUAL THOROUGHLY TO UNDERSTAND THE IMPORTANT FUNCTIONS AND CONTROLS Location On dash cover side LH Part No 1260 904 067 0A BLINDNESS CAN RESULT FROM BATTERY EXPLOSION KEEP SPARKS OR OPEN FRAMES AWAY FROM BATTERY DO NOT JUMP START BURNS CAN RESULT FROM BATTERY ACID IN CASE OF CONTACT FLUSH IMMEDIATELY WITH WATER Location On battery bracket RH Part No 1260 904 066 0 The cooling system operates under pressure It is dangerous to remove the radiator cap while the system is hot Always turn the cap slowly to the first stop and allow pressure to escape before removing the cap completely When operating below 32 F use suitable anti freeze solution as coolant Location On Radiator bracket side LH amp RH Part No 1260 904 063 0 Pull onl
32. The ring must be able to rotate unimpeded Shaft seal 5 by the springs With the assembly tool the shaft seal must STEP 6 into the housing Note that the small guide piece at the front of Cross pin 11 the tool must remain in the hole for the output shaft when the tool itself is drawn out of the housing Thrust bearing 7 Fit the thick race needle cage and thin l race Lubricate the output shaft on the inner One for housings for steering column mounting spool with Molykote PG plastslip 75 on the SJ150LA4011 01 One for housings with integrated steering column SJ150L4012 01 Fit the cross pin in the spool set Note there are two different tools surface 1n contact with the shaft seal STEP3 STEP 7 Spool sleeve 2 Housing spool sleeve 2 Guide spool and sleeve together turn the spools so that the key slots are opposite each other a With the housing still horizontal in the holding tool secure it with one hand With the other STEP 4 hand take the assembled spool sleeve set making sure two fingers hold the cross pin 11 in position Guide the spool set into the housing Insert the curved springs between the flat with the cross pin 11 horizontal springs and push them into place see sketch Springs 12 Note Be careful with the small guide piece from mounting of the shaft seal With it 1s pressed out by the shaft rotary b With housing and spool set remaining in the tool lift the wh
33. and can cause severe burns to skin AVOID HIGH PRESSURE FLUIDS 1 Before beginning work on hydraulic system components turn off engine and operate hydraulic control levers to relieve internal hydraulic pressure 2 Oil under pressure can penetrate skin and lead to personal injury Treat sources of oil pressure with extreme care wearing safety goggles 3 If hydraulic leak develops correct immediately Escaping hydraulic oil can have extremely high pressure A stream of high pressure oil may easily penetrate skin just like modern needless vaccination equipment but with the exception that hydraulic fluid may cause blood poisoning It 1s imperative that connections are tight and that all lines and pipes should be in good condition If injured by escaping hydraulic fluid see a doctor at once 1 2 STAY CLEAR OF PTO 1 Entanglement in rotating drive line can cause serious injury or death 2 Keep tractor master shield and drive line shield in place at all times except for special applications as directed in the implement operator s manual 3 Wear fairly tight tight fitting clothing Stop the engine and be sure PTO driveline is stopped before making adjustment connections or cleaning out PTO drive equipment SERVICE TIRES SAFELY Tire changing can be dangerous and should be done by trained personnel using proper tools and equipment Do not re inflate a tire that has been run flat or seriously under inflated Have it checked by qualified p
34. at the fitting portion between the upper tank and the core section or between the lower tank and the core section If any water leak should occur there repair the leak by soldering Besides making a visual check a more complete inspection should be accomplished as follows a Leak test with compressed air Place the radiator as shown in the figure Close the openings for water inlet and with something like a rubber plug and apply compressed air 1kgf cm or 14 2psi through the drain pipe into the radiator Excessively compressed air may damage the cores so perform the air delivery carefully watching the pressure gauge Water leaks are inspected by watching for rising air bubbles l Overflow pipe Radiator Water basin FIG 3 4 b Leak test with a radiator cap tester With the inlet and outlet pipes plugged up and the radiator filled with water replace radiator cap with a radiator cap tester as shown in the figure Pump up the pressure in the radiator to the specified value and check to see 1f there are any leaks in the radiator When the radiator is water tight the pressure indicated on the pressure gauge does not increase but if there are leaks the pressure decreases This tester 1s also applicable for leak tests for the whole cooling system not only for the radiator The test method is the same as mentioned above 3 3 AND Sy T ef h i E FIG 3 5 2 Inspection for radiator clogging To inspect the
35. battery unused for a long period of time When recharging the battery wash clean the outside of the battery case and the battery posts Check the level of the electrolyte in each cell and replenish with distilled water as necessary Temperature Self discharge Decrease In rate per day specific gravity per day 5 C 0 025 0 005 1 4 BATTERY TESTING CHARTS Step 1 VISUAL INSPECTION Check for obvious damage such as cracked or broken case that shows loss of electrolyte thermal damage etc Obvious damage No obvious damage Check electrolyte level Electrolyte level is below top of Electrolyte level is above top of plates in one or more cells plates in all cells proceed to step 2 Add water up to just above separators Charge for 15min with 15 25 amp 50 points or more variation Less than 50 points variation between highest and lowest cell between highest and lowest cell Recharge battery and if 50 points variation persists replace battery Specific gravity Below 1 225 Charge until all cells are at least 1 225 Specific gravity 1 225 or above Turn on head lamps or 15 A load for 15seconds Proceed to step 3 Replace battery Proceed to step 3 10 3 Step 3 1 Connect voltmeter and ampere load equal to Y the cold cranking amperes 18 C rating of the battery for 15 seconds 2 Observe voltage at 15 seconds with load on Disconnect load 3 Place thermometer in one cell to take temperature of electro
36. bolts 3 Connect hoses 4 Assemble the engine and the front transmission Note Apply small mount of grease to each of the sliding parts Be careful not to apply excessive amount of grease as this could cause clutch slipping During operation be sure to avoid any of the reassembly operations that may place load upon the input gear 5 Install the hydraulic system piping 6 Install the dash panel 7 Install the wiring and rods 8 Install the covers 9 Comnect the panel set wiring and then install the panel 10 Connect the wiring for the engine 11 Connect the battery terminals 12 Install the engine hood and side cover 13 Remove the clutch housing and engine tightening bolts and move the engine forward 2 11 4 SEPARATION OF THE FRONT TRANSMISSION AND SPACER TRANSMISSION Parts which can be inspected during This 7 Remove the slow return check valve knob operation HST unit PTO clutch 1 Removal A Removal of the whole floor 1 Remove the side covers LH and RH 2 Disconnect the negative battery cable 3 Detach all the wiring relevant to the removal of the floor FIG 2 23 Slow return check valve 8 Remove the remote control valve lever Hydraulic Remote Control Valve Lever FIG 2 24 remote control valve lever 9 Remove the diff lock pedal FIG 2 22 4 Disconnect the throttle lever cable from the fuel injection pump and accelerator pedal cable from the pedal 5 Disc
37. c e 17 bolt 18 Arm comp 19 Arm comp 20 Plate reverse 21 Washer plain 22 pin split 23 Arm cam 24 Arm cam 25 Bush 20X23X20 26 Bolt 27 Bearing ball 28 Washer plain 29 Nut 30 Snap ring 31 Nipple 32 Spring return 4 7 E E p M Ay fu LA id d Po 33 Bolt 34 Nut 35 plate forward 36 Bolt 37 pin oil damper 38 Washer spring 39 Damper oil 40 Bolt 4 Washer plain 42 Pin snap 43 pedal comp forward 44 Bolt 45 Pedal comp Reverse 46 Pad 47 Bolt Ogee Sl e gt 2 i E en te SS x it A ie AS 6 1 Hydrostatic system schematic Steering Cylinder D454 187 Oil filter a Es E I d Oil cooler Heat rejection capacity 6000Kcal h Vo 20LPM 1 Tol 107 C Qil capacity 0 21 L T I I l Ls eet LIH TEE ee er Bree I a A i 4 2 7 0bar E 60 100psi iei EP 10 30psD Relief Valve i 0 7 2bat ao i relief valve IN 7 0 10 5bar 100 150psi l l 421 9 437 3bar Klest Port 6000 6220psi SA E I Pest Port Pump System L Relief Valve 421 9 437 3bar 8000 8220psi I l I Hydrostatic Transmission Eaton 7122 RAC 02 Pump 40 6cc rev Motor 40 0cc rev Steering control Valve OSPM80 ON SO0cc rev Open center non road reaction type 110 kxt em Ist pump 2nd pump rated 2800rpm 9cc rev 9 8cc rev eH G
38. gt 77777T7 Liters to Gallons IMP sl AAA 1 T Se el ae EE ONE C TUN TEUER ERE FE ai NN STEIN ee eee 6 6000 13 2000 aa ae al ll al a ale gol tesooo 20 0200 202400 20 4600 206800 20 9000 211200 21340 215600 217800 0 11 14 MASS Pounds to Kilograms a salsa mal asa aa sal 85 4536 4990 5s443 5897 63 0 6go4 7258 7701 ses se 10 20 9072 osz6 997 10433 10 886 11340 11794 12247 12701 13 54 2o 30 13 70 sol 36288 36742 37195 37649 38 102 38 556 39010 39463 39917 40370 go 90 40 804 41278 417311 42 185 42638 43 002 43 546 43 999 44453 44900 eo 0 O 0 aes a e ua mal sl mala 10 22006 24251 26 455 28660 30 864 33069 35 274 37478 39683 41887 10 20 44 002 46 297 48 501 50 706 szeo 55 115 57 020 50 524 61 720 esees zo 30 66138 68 343 70547 72752 74956 77 161 79366 81 570 es 775 85979 so peas dio ratito tl iio CALAS sansi esef aa oso fo o 70 154 322 54 322 156 527 56 507 158 731 58 731 160 936 60 936 163 140 63 1 40 165 345 65 345 167 550 67 550 169 754 69 754 171 950 71 959 174 163 741 63 70 sol 176 368 178 573 180 777 182 982 185 186 187 301 189 596 191 800 194 005 196209 go 90 198 414 200 619 202 823 205 028 207 232 200 437 211 642 213 846 216 051 218266 eo 0 E A N N N
39. hours Adjusting accelerator pedal and throttle lever Oil leaks in clutch housing Hydraulic Replace after initial 100 fluid filter hrs and then after every 300 hrs 4WD front Check after every 100 A housing hrs Replace after every 600hrs hrs 1 Every terminal should be connected securely Check every year by removing the plug installed in the front bottom of clutch chamber 2 Wiring should not interfere with other parts 3 Fatigued wiring should be replaced 4 Wiring should be held in each clamp properly 1 27 Chapter 2 Disassembly and reassembly of major components SECTION 1 GENERAL PRECAUTIONS AND SEPARATION AND REINSTALLATION 2 1 1 Before operation _ 2 1 2 Precautions to be followed when installing standardized parts TT 2 1 SECTION 2 OPERATION CHART FOR DISASSEMBLY AND REASSEMBLY BY MAJOR BLOCKS 2 4 SECTION 3 SEPARATION OF MAJOR COMPONENTS 2 5 1 Separation of the front axle and axle bracket 2 5 2 Separation of the engine and front axle bracket _ 2 6 3 Separation of the engine and front transmission 2 7 4 Separation of the front transmission and mid transmission 2 12 5 Separation of the mid transmission and rear trans mission 2 16 6 Separation of the rear tra
40. in PTO shifter lever The tractor can be started only if High low shifter lever is in neutral position Safety Starter Switch is to be replaced after every 2000 hours 4 years whichever is earlier 1 8 USE OF ROPS AND SEAT BELT The Roll Over Protective Structure ROPS has been certified to industry and or government standards Any damage or alternation to the ROPS mounting hard ware or seat belt voids the certification and will reduce or eliminate protection for the operator in the event of a roll over The ROPS mounting hardware and seat belt should be checked after the first 100 hours of Tractor and every 500 hours thereafter for any evidence of damage wear or cracks In the event of damage or alteration the ROPS must be replaced prior to further operation of the Tractor The seat belt must be worn during machine operation when the machine is equipped with a certified ROPS Failure to do so will reduce or eliminate protection for the operator in the event of a roll over PRECAUTION TO AVOID TIPPING Do not drive where the Tractor could slip or tip Stay alert for holes and rocks in the terrain and other hidden hazards Slow down before you make a sharp turn Driving forward out of a ditch or mired condition could cause Tractor to tip over backward Back out of these situations if possible PARK TRACTOR SAFELY Before working on the Tractor Lower all equipment to the ground Stop the engine and remove the key KE
41. is pushed rightwards to connect port P and part A Therefore no fluid from the pump is branched off to the PTO clutch that 1s all fluid flows to the control valve 1 Passage 1 2 Passage 2 3 Pressure reducing valve 4 Changeover valve 5 PTO clutch 6 To control valve Fig 9 5 PTO solenoid switch OFF position 1 Pressure reducing valve This valve is composed of the spool spring and piston and bleeds off the surplus fluid from the pump into the tank by actuating the spool when the fluid pressure exceeds the regulated pressure at port B 2 Fixed orifice This orifice controls the fluid flow at B in accordance with the pressure differential between the secondary pressure of the pressure reducing valve and the PTO clutch actuating pressure 9 6 3 FLOW CONTROL VALVE SLOW RETURN CHECK VALVE 3 1 GENERAL DESCRIPTION This valve regulates the lowering speed of the lift by controlling the unloading flow from the lift cylinder to the tank DDust seal 2 Snap ring 3 Collar Body 0 ring Adjust screw Back up ring 8 0 ring 9 Stop ring 10Poppet Spring 120 ring L Slow return check valve 3 2 OPERATIONS 1 DOWN position The fluid from port B pushes up stop ring 9 of poppet 10 until the ring comes into contact with adjust screw 6 as it reaches chamber R Consequently the extent choke C is opened is determined by the positioning of adjust screw 6 that is when adjust
42. or replace 2 Retighten or replace 3 Replace radiator cap 4 Repair or replace 5 Inspect cylinder head and Replace gasket 6 Replace 1 Replace 2 Retighten or replace 3 Replace 4 Replace SECTION 2 AIR CLEANING SYSTEM I GENERAL DESCRIPTION Unfiltered air contains many particles harmful to the engine such as dust sand or other foreign matter When such foreign matter have entered in to the engine They have mixed into the lubricant and promote wear of lubrication parts in addition to damaging the piston cylinders To eliminate these harmful particles an air cleaner has been installed The air cleaner Which is installed on the T series tractor is a dry cyclone type and is constructed as shown in the figure Under the influence of suction generated by the engine unfiltered air flows through air inlet tube and is forced into a high speed centrifugal motion By this circulating action most of the dust and dirt particles are separated from the air and collected in the dust unloading valve 4 The remaining dust 1s removed as the air flows through the paper element 2 before being drawn into the engine D Body Paper element outer Cover assy 4 Dust unloading valve FIG 3 10 Air Cleaner 3 7 2 ELEMENT AIR CLEANER 1 SPECIFICATIONS 2 DISASSEMBLY 1 Element removal Remove the wing bolt which clamps the paper element and take out the element 1 Air cleaner Sub assembly 1 01 Body assy 1 02 Body
43. pump 4 Hydrostatic Motor 5 3 1 1 Disassembly 1 Removal of HST system and related parts Separate the engine from the front transmission referring to the paragraph of SECTION 7 REPAIR in CHAPTER 4 1 HST Unit 2 Hydraulic filter 3 Valve 4 Pin hollow 5 6 7 8 9 Bolt hex Fig 5 3 Fig 5 4 1 Shaft PTO Clutch 2 Gear helical 35T 3 Bearing Ball 4 Bearing Ball 5 Collar 26X35X03 6 Bearing Ball 7 Metal Bearing 8 Gear Helical 21T 9 Bearing Ball 10 Shaft PTO drive counter 11 Gear helical 32T 12 Bearing Ball 13 Bearing Ball 14 pin 15 Bolt 16 Coupling 50 17 Bearing Ball 18 C ring 36X62 19 Coupling 36X62 20 Clutch PTO Clutch 31 Seal set B 1 2 REASSEMBLY Reassemble them in reverse order of disassembly in accordance with the following instruction Installation of clutch damper and related parts 1 When installing the clutch damper on the flywheel be sure to install the cotter pin to flywheel 2 Apply a thin coat of molybdenum disulfide based grease Three bond TB1901 or equivalent to revolving or sliding parts prior to reassembly 3 When installing the clutch damper on the flywheel take care not to damage this clutch damper 4 Apply an ANTI RUST 720S or equivalent after installing clutch damper in order to prevent from rust Apply heat proof grease Apply adhesive TB1215 HST Unit Mid case Apply adhesive TB1207B E la ww g El TENT Wal i e
44. resistance with turning 1 Worn of spline gear column 2 Depressed control set 3 Aur trapped in cylinder and pipe line 4 Excessive backlash column 5 Poor turning of column or wear of bearing Counter measures Replace spring Adjust fluid level and pressure properly Wash Check column and adjust Replace column Wash and Adjust fluid level and pressure properly Deflate the air Adjust column Replace column and replenish oil 5 Too much free play of steering wheel Rough touching on tire causes vibration 1 Air trapped in steering cylinder and pipe line 2 Worn ball bearing 6 Free play steering wheel 1 Insufficient oil in the tank 2 Worn damage steering cylinder 3 Loose spacer in unit 7 Kick back of steering wheel 1 Loose check valve in P port or don t operate 2 Trouble in system Deflate the air Replace Replenish oil Replace oil seal and cylinder assemble spacer parts Adjust check valve consult workshop Problems and probable causes Counter measures 8 Serious kick back each side 1 Poor assemble the gyrotor lower the unit Reassemble 9 Steering wheel is very heavy to begin turning 1 Oil density is too high or cool Replace oil 10 External Oil leakage 1 column Replace oil seal slide ring 2 End cap gyrotor Replace o ring 3 Tightening Bolt Replace copper washer Torque 1st 175 kgf cm 2nd 280 kef cm Chapter 9 Hydraulic system NN ey
45. screen IN Fuel filter Fan belt A CJ gt gt i illi Check after every 100hrs and replenish if necessary Electrolyte level oo ol ofol ofo of of tra A IS IS IS O IS SS ET EE A ES INS IS IS IS IS IS O O IS E IL L aL eo eo 1 25 inspection replenish and adjustment Replacement A Cleaning and or washing TRANSMISSION Consult your Dealer Inspection and servicing intervals Aeq Hour of operation X10 on hour meter Inspection Judgeement criteria Intervals after that mm in Transmission oil HST oil Brake pedal Greasing up each part Replace after initial 50 Clean hydraulic hrs then after every 300 suction filter at the same time Check after every 100 hrs Replace after every Free play 1 18 1 57 in Replenish after every 50 hrs every time after pudding Check every 300 hrs 0 08 0 24 in Inject grease after every 900 hrs Steering wheel free play Front wheel hub greasing Retightening Check after every 300 ball joints of steering system All should be tighten Wheel tightening bolts Replenish every 50 hrs Everyday in dusty condition Greasing each nipple Loose bolts and nuts Electric wiring Inspection and servicing intervals Hour of operation X10 on hour meter Inspection Judgment criteria Intervals after that mm in All should work properly Electric Parentheses Check after 300
46. screw 6 is screwed in clockwise the opening of chock C decreases and the lowering speed of the lift arm slows down whereas the opening of choke C increases and the lowering speed of the lift is accelerated when the adjust screw 1s unscrewed counterclockwise When the adjust screw screwed in completely the poppet comes into contact with body seat S and the choke is closed completely so the lift arm stops S To control valve Cylinder C a Fig 9 7 Down position 2 Up position The flow port A overcoming the force of spring 11 pushes up poppet 10 and choke C is fully opened regardless of the position of adjust screw 6 Thus the fluid flows to port B and the cylinder which results 1n raising the lift arm Cylinder To control valve Fig 9 8 Up position 9 8 4 RELIEF VALVE 1 GENERAL DESCRIPTION This valve regulates the maximum pressure in the whole hydraulic circuit The regulated pressure can be set with the adjust screw Fig 9 9 Relief valve in PTO solenoid V V Fig 9 10 relief valve circuit 9 9 2 PRECAUTIONS FOR DISASSEMBLY AND REASSEMBLY 1 Tightening torque of lock nut 9 5 0 6 0 kef cm 36 2 43 4 ft Ibs 2 Install seat 2 and then tap ball 3 5 16 lightly so as to provide tight seating 3 Wrap the valve threads with sealing tape and tighten the valve up to a specified torque of 5 6Kgf m 36 43 ft Ibs 4 Before disassembly the current screwing in depth of the adjust screw sho
47. spring 3 Worn or broken sealing of PTO clutch 4 Worn friction plates or driven plates 5 Overheated fluid 6 Port B regulated pressure is too high of Flow divider 7 Stuck pressure reducing valve spool 8 Clogged orifice in pressure reducing valve spool Countermeasures Lap after correcting flaws with oil stone Replace Replace Replace Refer to paragraph for fluid overheating Inspect and reset pressure Lap after correcting flaws with oil stone Clear clogged with compressed air or with a sharp point Chapter 10 Electrical accessory and instruments SECTION 1 GENERAL DESCRIPTION 10 1 SECTION 2 SPECIFICATIONS 10 1 SECTION 3 BATTERY 10 2 1 1 Inspection 10 2 1 2 Inspection of electrolyte level 10 2 1 3 Inspection of electrolyte specific gravity 10 2 1 4 Battery testing chart 10 3 SECTION 4 Meters and switches 10 5 1 Meters 10 5 1 1 Removal 10 5 1 2 Tacho Hour meter 10 5 1 3
48. the bevel pinion ring gear TRB collar etc has been replaced inspect the bevel pinion assembly for thrust play in the front axle housing through drain plug hole 0 1 0 2 0 004 0 008 in Specified thrust play mm in 3 FINAL CASE 3 1 Front gear case 1 1 Final drive case A 2 Gear bevel 9 3 RBB 6208 4 Pin parallel 5 Bolt fine 6 Washer spring 7 Gear bevel 16 8 RBB 6207 11 Final drive case B L 13 Final drive case B R 14 Housing seal 15 Seal 16 RBB 6014 17 shaft 18 Gear bevel 12 19 RBB 6308 20 O ring 23 Cap 90 25 Shaft RH 296 26 shaft LH 480 30 C ring 3l collar 68X80X2 35 Space 47 5 40 Snap ring 41 RBB 6012 42 Snap ring 43 Plug 45 shim 46 Snap ring 48 Bolt 49 Nut 6 10 3 2 Front gear case 2 10 Bolt 11 Nut 12 Gear Bevel 41 13 C ring 14 Seal 15 Bearing Ball HL 1 16 Bearing Ball 17 Cover wheel shaft 18 0 ring 19 Bolt 20 Shaft wheel 21 Washer 50X60X2 1 Case LH Final Drive 8 2 Case RH Final Drive B 3 Shaft 4 Gear Bevel 11 5 Bearing Ball 6 Cap 90 7 Plug square Fig 6 19 8 Shim 75X90X2 9 C ring 3 Disassembly 1 Drain oil from the final case by removing the drain plug 2 Remove the tie rod or the tie rod end 3 Remove the final drive case clamping bolts and take out the assembly of the wheel shaft 4 Remove the wheel shaft cover clamping bolts and cap 90 Note Discard the removed Cap 90 and install a new cap 90 when reassembled because
49. the top of the tunnel section from the outside 4 Remove five screws attaching transmission to tunnel section Note length and location of screws when removing NOTE Oil may drain from the pump and motor unit after it is removed Have a suitable container ready to catch excess oil 5 Gently pry around edges of flanges to break sealant Remove transmission 4 23 NOTE Drive shaft may come out with transmission If removed with transmission remove from transmission and install into tunnel and range transmission Installation Installation is the reverse of removal Clean flanges of transmission and tunnel before applying sealant Apply TB1215 sealant to flanges of transmission where it contacts the tunnel Tighten the screws attaching transmission to tunnel to 126 154 N m 95 115Ib ft IMPORTANT If neutral adjustment locking screws was loosened neutral adjustment procedure must be performed See HYDROSTATIC PEDAL AND NEUTRAL ADJUSTMENT 3 HYDROSTATIC TRANSMISSION DISASSEMBLY j Cap screws o as 00 q Hydrostatic motor IMPORTANT The pump body and motor body are aluminum and can be easily damaged by steel tools Be careful to not damage machined surfaces Do not use screw driver or other sharp objects to pry pump or motor body from back plate 1 Remove eight socket head screws Securing the hydrostatic motor to the back plate tap of the motor housing with a plastic mallet t
50. transmission case Window e sus ix tn lt 1 FIG 2 54 Frame rubber mounts 8 Remove the rear axle housing tightening bolts 9 Remove the brake case from the rear transmission case 10 Detach the brake assembly from the rear transmission case 2 19 7 SEPARATION OF THE REAR TRANSMISSION AND MID PTO GEARS Parts which can be inspected during This operation MID PTO gears Inspection and service of the rear transmission should be performed following the instructions in the paragraph 5 SEPARATION OF THE REAR TRANSMISSION AND SPACER TRANSMISSION Removal 1 Remove the operator s seat x C E P YS lt 0 Os SS gt 7 S N eae 1 A wa gt em lu x w px A C B FIG 2 56 operator s seat 2 Remove the position lever 3 Remove the lever guide RH 4 When the tractor 1s equipped with an optional remote control valve remove the remote control lever and related parts from the bracket 5 Remove the back panel 6 Remove the tank cover 7 Remove the wiring for the rear combination lamps and trailer socket coupler 8 Drain the fuel of fuel tank 9 Remove the fuel tank and tank stay bracket 10 Detach the delivery pipe from the cylinder case 12 Remove the slow return check valve along with the shaft 13 Remove the 3 point lift link and related parts from the lift arm 14 Remove the MID PTO case ti
51. transmission of oil 2 Remove the front wheel drive shaft 2 14 FIG 2 33 Front wheel drive 3 Disconnect the brake rods FIG 2 34 Brake rod 4 When the tractor 1s equipped with an optional remote control valve remove the remote control piping FIG 2 35 Optional remote control valve 5 Remove the suction and delivery pipes 6 Remove the delivery pipe for the PTO clutch 7 Remove the 4WD shift metal FIG 2 36 4WD shift metal 8 Remove the HST unit from the front transmission case 9 Hold the clutch housing and space transmission case with a crane or jack 10 Remove the bolts which tighten the front transmission and spacer transmission cases 11 Move the rear part of the tractor rearwards by turning the rear wheels by hand and then the spacer and rear transmission assembly will be separated from the front transmission Note When moving the rear part of the tractor be careful not to allow the garage jack to shift from the spacer transmission case Remark The rear transmission and spacer transmission cases should be separated and the reverse shift metal support removed in order to take care out or provide access to the main shift and transmission range shift gears For further details refer to Chapter 5 Transmission 2 installation Reassemble in reverse order of disassembly 1 Assemble the front and spacer transmission Make sure that the turning lock of the PTO clutch is securely sea
52. unit valve 1 Low setting pressure of relief valve 2 Ball nut heavy to work 4 Trouble machine mechanism 1 Poor link work 2 Excessive sector gear pre load 2 Return to neutral is too slow 1 Poor assemble steering column and unit 1 Poor assemble to center between column and unit 2 Column assembly face depressed unit bushing 2 Depressed control set spool sleeve 1 Excessive fluid volume 2 Excessive pressure 3 Dust 3 High pressure ratio of T port tank port 1 Tank port hall is small 2 Tank port pipe 1s linked to other lines Counter measures Replace column spline Check column assembly face and spline length MAX 6 5mm Replenish oil or Exchange Exchange pump Replenish oil Adjust relief pressure Adjust fluid level properly Wash clean or replace Wash and replenish oil Adjust backlash Loosen the bolt and fix again with center Replace column or repair Adjust fluid level properly Adjust pressure Wash MAX Pressure ratio 20 bar Wash and clean pipe line Separate unit pipe line and reinstall Problems and probable causes 3 Free play of steering wheel 1 Too low elastic of centering spring Remove P port pipe line and check left and right turning 1 Damaged spring or poor elastic 2 Depressed control set 1 Excessive fluid and pressure 2 Depressed by foreign material 3 Depressed from external when assemble with column 4 Steering wheel
53. will be stopped within 103 sec 1 Brake S W PTOS W HSTS W Z 1 nt BT Ww TFT dN n Tj FE t T T Note When the seat S W is Off position engine will stop after 3 seconds b Engine Start control Engine can be started on the condition of Brake S W ON HST S W and PTO S W OFF Position c Cruise control When Cruise momentary S W is operated as Procedure OFF ON OFFE it will change the output of Cruise magnetic And ON output relay will operate to light the cruise lamp 2 CIRCUIT DIAGRAM CRUISE ON S W BATTERY 12V ine EN 10 I BRAKE S W CRUISE MAGNETIC PARK BRAKE oT S PTOLS W Ai PTO AUTO BR PANEL LAMP MANUAL S W 99START WI 9 4 GENERATOR SIGNAL STARTER RELAY 1 5A CHARGE LAMP A JV CHECK LAMP Wi ENGINE STOP SOLENOID Fig 10 21 controller MESE Tesh slo fo uhhh ahh of hsp Fig 10 22 connector 1 Battery 12V 11 GND 2 Battery 12V 12 HST S W 3 Hey 12V 13 Seat S W 4 Generator charger signal 14N C 5 Brake S W 15 PTO S W 6 Parking brake S W 16 N C 7 Cruise S W 17 Cruise lamp 8 Check valve 18 Cruise magnetic 9 Starter S W 19 Starter relay NEI SIOD SO IENON 20 Engine stop solenoid 10 10 8 Trailer socket A hella s 7 pin trailer socket 1s equipped as a standard equipment Lamp on a trailer can be operated through the socket e pes IN A ywy S aas n 7 lamei N amp y Fi AMC qu 2 3 a 2 3 4
54. 0 09 mm 1 on each side 18 mm 29 9 mm SECTION 3 DISASSEMBLY INSPECTION AND REASSEMBLY Separate the rear axle housing from the rear transmission referring to paragraph 6 1 of SECTION 4 SEPARATION OF MAJOR BLOCKS in Chapter 2 1 REAR AXLE HOUSING AND BRAKE SYSTEM 2 Housing rear axle 3 Bearing Ball 6307 4 Bearing Ball 6211 5 Snap ring 6 Mechanical seal 7 Wheel shaft 8 Collar 56X65X239 9 Stop ring 10 Gear helical 54 11 Bearing Ball 6209HL1 12 Bolt ew 13 Bolt Fig 7 2 14 Washer spring 14 15 Nut 3 Pinion wheel 10LH 4 Case Brake LH 5 Arm brake 6 Case brake 7 Pinion wheel 10RH 8 Metal brake RH 9 Metal brake LH 10 Plate separate 11 Plate brake 1 1 Disassembly 1 Release the bolt and nut and remove them 2 Extract the bearing 11 with a puller and remove wheel gear 10 Fig 7 4 3 Remove the snap ring 9 collar 8 and pull out wheel shaft 7 1 2 INSPECTION 1 Friction plates Replace the plates whose surfaces have been become glossy by carbonization or whose thickness exceeds the usable limit Note Removed oil seal 6 should be replaced with a new one when reassembled 4 Remove the brake metal tightening bolts and remove brake metal 4 with wheel pinion 3 and disc brake assembly on it 5 Remove the snap ring of wheel pinion 3 Fig 7 6 And individually separate the friction plates metal brake cam brake and separator Pig 1 plates 11 from each oth
55. 1 03 Cover 1 04 Cover assy 2 Bracket comp guide 3 Hose air inlet 4 Hose air outlet 5 Clip 64 6 clip 60 7 Bolt S Plate stay Engine FIG 3 11 3 INSPECTION OF EACH PART 1 Inspection of the cleaner body 1 Check the cleaner exterior for cracks deformation or damage and repair or replace if necessary 2 Check each packing for fatigue or damage and replace if necessary SR E m 1 E MESS 4 v A4 m M e gt d Tl 2 Inspection of rubber hoses Check the rubber hoses for fatigue or damage and replace if necessary 3 Inspection of the paper element to check the element for damage Dry it sufficiently after washing and put an electric bulb in to the element and look for damage 00000000000 000000000000 OOOO FIG 3 12 Element check Note Especially note the glue portions of the paper and metal parts 4 CLEANING THE AIR CLEANER Clean the air cleaner after 100 hours of operation or less depending on conditions in the following manner 1 When the air cleaner is cleaned or the element is replaced dust accumulated inside the air cleaner body should be removed with a cloth As inhaled dust causes engine wear remove a dust accumulated inside the inlet pipe the rubber hose which connects in the inlet pipe and the air cleaner the inlet manifold and inlet port 1 When accumulated dust is dry When removing the dust in the element hold the element by a hand and pat t
56. 215 on the circumference before installing b Install the oil seal on the PTO shaft paying attention to its installed direction c After installation the slide coupling should smoothly slide and mesh with the designated gears O ring Apply Grease i Sit JI 1 y ji Hi HE WF LB I Apply adhesive TB1215 Fig 5 37 3 MID PTO shaft and related parts A E se 1 ae eo c M ei LJ J I9 EE 8 e M iM L Xx e D Tb egt ALS asp A d jue z e i bx e de Ex Li Er EN E M El Gi 1 TU We Apply adhesive TB1215 Fig 5 38 5 23 4 SHIFTERS AND RELATED PARTS 4 1 CONSTRUCTION 1 Forward and reverse control linkage mechanism o E Ae MUS NK NS NU cv s A A 1 E A r PN neo 2 gt E Y ya Fig 5 39 1 Holder comp 2 Bolt 3 Washer spring 4 Washer plain 5 Nut 6 Rod comp 7 Nut 8 Nut 9 Elbow LH 10 Elbow RH 11 Washer spring 12 Nut 13 Pin 14 Pin 15 Snap ring 16 Snap ring e Ne se 17 bolt 18 Arm comp 19 Arm comp 20 Plate reverse 21 Washer plain 22 pin split 23 Arm cam 24 Arm cam 25 Bush 20X23X20 26 Bolt 27 Bearing ball 28 Washer plain 29 Nut 30 Snap ring 31 Nipple 32 Spring return 5 24 35 plate forward 36 Bolt 37 pin oil damper 38 Washer spring 39 Damper oil 40 Bolt
57. 7 881 38 502 39123 39744 40 365 40 986 41607 42228 42849 60 90 55 890 56 511 57132 57 753 58 374 58 995 59 616 60 858 61479 90 62 100 63 963 67 068 67 689 11 12 fs cm cm2 Cal ee m ex sm sm sel e 98 x3 i 64620 7i 082 77544 84006 90468 96 930 103 302 109864 116316 122778 10 30 40 50 387 720 60 zo 452340 458 802 465264 471 726 478 188 484 650 491112 497 574 so4036 510 498 70 80 516 900 s23422 529 884 536 346 542 808 549270 555732 562194 568656 575118 ed 90O 681580 588 042 594504 600 966 607 428 613 800 620 352 626 814 633 276 639 738 90 0 0 1 550 3 100 4 650 6 200 40 e esoo e 9eo ezee ezo ioozs 10 280 iosss ioso 1055 eo zo 10850 11005 11160 11315 trazo 116056 11780 ttess 12090 12245 70 leo 12400 12555 12710 12865 13 020 13175 13330 13485 13640 13795 ed 90 1390 14105 14260 14415 14570 14725 14880 15035 15190 15345 eo Cubic inches to Cubic Centimeters ia3 o 1 2 3 4 5 e 7 8 9 m e cma cc cm3 cc cm3 cc cm3 cc Cm3 cc Cm3 cc cm3 cc Cm3 cc cm3 cc Cm3 cc Wile od 0 000 60 983 220 999 607 1015 994 1032 381 1048 768 1065 155 1081 542 1097 929 1114316 1130703 60 80 1310 960 1327 347 1343 734 1360 121 1376 508 1392 895 1409 282 1425 669 1442 056 1458 443 80 40 oeios osre ozss
58. 80 600 900 91 800 92820 93840 94 860 95 880 96 900 97 920 98940 99960 100 980 eo 11 17 Temperature ie 20 10 H 0 a 0 ho o CO no INO PO Po laa JA Ll b gr dl NO no C9 no co o e oo lon n JO IN JA 02 CO On O OO CO MIR Nol ol loo O JP JA IN co NJ Po JO lo no oo Jo 1 co O1 10 20 25 30 40 45 50 55 60 65 70 Lo 80 OD 90 Fahrenheit to Centigrade 26 20 17 17 16 15 12 o JO co JO oo oo Io CO O O1 O o1 O O1 O O1 O O1 On Tl 100 105 110 115 120 125 130 135 140 145 150 155 160 212 C 35 0 37 8 40 6 43 3 46 1 48 9 OE 54 4 57 2 60 0 62 8 65 6 68 3 11 1 3 9 76 7 79 4 82 2 85 0 87 8 90 6 93 3 96 1 98 9 100 0 11 18 C Centigrade to Fahrenheit 30 28 26 24 22 20 18 O04 48 16 32 50 14 68 52 i2 104 54 10 140 J 56 8 6 212 60 4 E ol 320 66 2 356 68 4 392 70 6 428 72 8 464 74 10 500 76 12 58386 78 14 572 80 16 608 82 18 644 84 20 680 86 22 24 752 90 26 28 301 86 0 ee 32 896 98 34 96 8 100 4 104 0 107 6 111 2 114 8 118 4 122 0 125 6 129 2 132 8 136 4 140 0 143 6 147 2 150 8 154 4 158 0 161 6 165 2 168 8 172 4 176 0 179 6 183 2 186 8 190 4 194 0 197 6 201 2 204 8 208 4 212 0 T303HST T353H
59. 9 Cycle all hydraulic controls to relieve system pressure 13 Disconnect two work port tubes form SCV 14 Remove two cap screws and two spacers that d lal attach tube support bracket to frame Remove To avoid injury from escaping hydraulic oil under pressure relief the UI 15 Install RH rear wheel and tire 16 Locate and disconnect all electrical connectors attaching wiring harness switches and lights on rear half of tractor Unfasten wiring harness from cable clips and move harness away from rear half of tractor pressure in the system by stopping the engine and operating all hydraulic CAUTION control valves Note Hydraulic reservoir contains approximately 26L 6 8gal of oil Have a suitable container ready to catch drain oil 10 Drain hydraulic reservoir 11 If tractor is equipped with SCV raise RH rear of tractor and support on suitable stands 12 Remove RH rear wheel and tire 4 17 Fuel hose 1100 Hose band 18 5 wire band 250 All electrical connectors attaching wiring harness switches and lights on rear half of tractor Fuel hose Dr n i A r4 E d UE zd L clamp worml 4 5 px ER Fuel hose 1100 e 3 All electrical connectors attaching wiring harness switches and lights on front half of tractor 17 Disconnect lower brake rods at rear brake levers 18 Remove turnbuckle at front of lower brake rods and remove brake rods from tractor 19 Disconnect h
60. Broken or worn pump parts Inspect and replace defective parts 9 Excessive 1 Dirty fluid Eliminate foreign matter and inspect wear deflection or filters ee pup 2 Circuit pressure exceeds pump Adjust relief valve or replace if capacity necessary 3 Oil less oper ation due to Inspect transmission oil level and Insufficient oil quantity maintain specified oil level by replenishing In either case clean and repair pump parts and replace damaged ones if necessary 10 01l leaks Broken or fatigues oil seal or Replace outside pump O ring 11 Oil leaks from Poorly connected piping Inspect clean and eliminate dust Repair flaws with oil stone if necessary Retighten piping or joints Broken piping Replace with a new one after washing clean related parts 12 0il leaks Poor oil seals Replace oil seal or bushing if around lift arm D 13 Independent 1 Clogged fixed orifice of Flow Disassemble and wash clean PTO clutch slips or divider is too slow in engaging 2 Port B regulated pressure is too Inspect and reset pressure slow 3 Clogged PTO pressure control Disassemble and wash clean valve or stuck Repair flaws with oil stone if necessary or replace with a new one 4 Poor flow divider solenoid Disassemble and repair or replace valve with new one if necessary Problems 14 Independent PTO clutch is too quick in engaging Causes 1 Stuck pressure reducing valve spool 2 Fatigued or broken pressure reducing valve
61. ECTION 1 GENERAL DESCRIPTION 1 WHEEL DRIVE SYSTEM The wheel driving system 1s composed of the following major components Damper Transmission Change gears Mid transmission Front drive change gears PTO Clutch Rear transmission MID PTO change gears REAR PTO change gears Fig 5 1 Wheel drive system 2 PTO DRIVE SYSTEM 1 PTO drive system 1s composed of the hydraulic clutch and the PTO change gears 2 PTO drive system is composed of MID PTO and REAR PTO which is referred POWER TRAIN DIAGRAMS 3 POWER TRAIN DIAGRAMS Refer to page 5 38 at the end of this chapter 5 I SECTION 2 SPECIFICATIONS 1 WHEEL DRIVE SYSTEM T303HST T353HST Speed shift range Engine rated rpm 2800 rpm Speed range shift L Low 0 3250 13 40 SUGANO M Mid 0 6061 20 33 ratio H High 1 3182 29 22 Drive pinion Wheel gear 0 0363 10 5 1 10 54 Operation Main speed shift Pedal RH methods Speed range shift Side shift LH Oil Transmission case Recommended Oil THF500 capacity 2 PTO DRIVE SYSTEM Rotation direction CW viewed from the rear Rotation direction meewewwpas O 5 2 SECTION 3 DISASSEMBLY INSPECTION AND REASSEMBLY 1 HST system and change gears front transmission E NYY ES M v Fig 5 7 Charge pressure relief Valve 1 Input shaft From engine 8 Filter mount port 2 Control Lever 3 Back Plate 9 For amp Rev Relief valves 10 Hydrostatic
62. ECTION 2 SPECIFICATIONS 5 2 1 Wheel drive system 5 2 2 PTO drive system 5 2 SECTION 3 DISASSEMBLY INSPECTION AND REASSEMBLY 5 3 1 HST system and change gear front transmission 5 3 2 Mid transmission Case 5 6 1 PTO Input gear 5 6 2 PTO counter shaft 5 6 3 PTO clutch 5 7 4 HST Unit 5 10 5 MID PTO Stopper 5 13 6 MID PTO Stopper operation 5 14 3 Rear transmission 5 15 4 Shifter and related parts 5 24 SECTION 4 TROUBLE SHOOTING 5 36 1 Wheel drive system 5 36 2 PTO drive system 5 37 3 Power train diagrams 5 38 Chapter 5 Transmission S
63. EP RIDERS OFF TRACTOR Do not allow riders on the Tractor Riders on Tractor are subject to injury such as being stuck by foreign objects and being thrown off of the Tractor 1 9 AVOID HIGH PRESSURE FLUIDS Escaping fluid under pressure can penetrate the skin causing serious injury Keep hands and body away from pinholes and nozzles which eject fluids under high pressure If ANY fluid is injected into the skin Consult your doctor immediately PREVENT BATTERY EXPLOSIONS Keep sparks lighted matches and open flame away from the top of battery Battery gas can explode Never check battery charge by placing a metal object across the poles PREVENT ACID BURNS Sulfuric acid in battery electrolyte is poisonous It is strong enough to burn skin cause holes in clothing and cause blindness if found entry into eyes For adequate safety always 1 Fill batteries in a well ventilated area 2 Wear eye protection and acid proof hand gloves 3 Avoid breathing direct fumes when electrolyte is added 4 Do not add water to electrolyte as it may splash off causing severe burns If you spill acid on yourself 1 Flush your skin with water 2 Flush your eyes with water for 10 15 minutes Get medical attention immediately SERVICE TRACTOR SAFELY Do not wear a necktie scarf or loose clothing when you work near moving parts If these items were to get caught severe injury could result Remove rings and other jeweler to prevent e
64. External pressure Pump Pressure Unload Cylinder Brake pressure 2 e MA mE Tank Pressure Lowering Fig 9 45 5 SERVICING INSTRUCTIONS 1 Required tools 6mm set screw wrench and torque Wrench 19mm spanner and torque wrench 22mm spanner and screw wrench conventional screw driver 3mm 0 12 1n in blade width plastic rod 010mm 0 394 in Oil stone cleanser tweezers etc 2 Tightening torque Description Tightening torque Kef m ft Ibs Plug M16 3 5 25 3 Plug M14 25 18 1 Sunk Plug 2 5 18 1 Sp ol head 0 8 5 8 Stopper bolt 0 8 5 8 3 Disassembly Main spool and related parts Remove the snap ring E and draw out the main spool carefully Note The main spool and spool head are screw fitted so they can be separated from each other But they are tightened with adhesive applied so they should not be disassembled unless required Holding check valve and related parts Remove the plug and take out the spring The poppet can come out only by slanting the casing and if not remove it with pliers Unloading valve 1 compensator Remove the plugs from both sides and take out the spring and spool Unloading valve 2 Remove the plugs from both sides and take out the spring and spool 9 25 Note The spool and stopper bolt are tightened with each other with adhesive applied to their threads so they should not be separated unless required by removing t
65. FIG 2 15 Note Tilt the steering column rearwards Lift up the panel set and disconnect the wiring couplers 5 Remove the cover Fig Stands 2 8 6 Disconnect the hydraulic hose from the power steering orbitrol Note Disconnect the linear shift control cable Disconnect the cable from both the steering lever side and transmission 7 Remove the mounting bolts and dismounting the dash panel FIG 2 17 8 Wedge both sides of the front axle to prevent the engine from tilting FIG 2 18 hardware Disassembly FIG 2 19 Wedging 2 0 8 Disconnect the rubber hose from the suction pipe 2 Engine separation from the chassis When separating the engine from the chassis the following steps are required as well as the ones mentioned above FIG 2 20 suction pipe T335 T331NHGBJ E 605 1 Lift the engine with the hoist and hold the front axle bracket with a stands or the like 2 Disconnect the upper Lower and drain hoses from the radiator 3 Disconnect the two power steering system hoses FIG 2 21 Line up 4 Remove the fuel hose 5 Disconnect the the inlet pipe 6 Loosen the right hand pivot metal tightening bolts beforehand 7 Separate the engine from the front axle bracket 3 INSTALLATION REASSEMBLY IN REVERSE ORDER OF REMOVAL 1 Install the engine on the front axle bracket 2 Retightening the right hand pivot metal tightening
66. H i Kare EL 9 M M RL yi Ne ae D AD 3 2 INSPECTION Before and after disassembly inspect each part for the items mentioned below Parts which deviate from the specified values should be replaced Wash clean all disassembled parts and check them for wear damage deformation Burning etc Defective parts should be corrected or replaced As the drive pinion and the ring gear make a pair they should be replaced together even if only one is found to be defective Backlash between the drive pinion and the ring gear Backlash 0 1 0 2 mm 0 004 0 008 in Backlash between the diff pinion and the dif side gear Backlash 0 1 0 2 mm 0 004 0 008 in When the backlash exceeds 0 5mm also inspect the thrust collar for wear defective collars should be replaced Disengaging the resistance of PTO shifters Standard Value 18 22K ef 40 491bs 17 Kgf 38 Ibs Usable limit Measured at the shifter 3 3 REASSEMBLY Reassemble the parts in reverse order of disassembly following these instructions 1 Ring gear Drive pinion and related parts a Apply oil to the drive pinion and related parts ahead of time Then install them and tighten the assembly to the specified torque Tightening torque 1 4Kgf m 9 36 ft lbs 5 19 1 Drive pinion 2 Tapered roller bearing 3 Drive pinion metal 4 Tapered roller bearing 5 Nut M30X1 0 6 Gear b Be sure t
67. IMPORTANT If steering fails to respond or pump pressure is not being delivered to steering control unit SCU shut engine off and check to see that steering hoses are connected to the correct SCU ports 8 Slowly turn the steering wheel left and right until wheels turn smoothly indicating that any trapped air has been bled back to the reservoir IMPORTANT If rock shaft fails to react to lift control lever movement shut engine off and check hose clamps on suction tube elbow and manifold to ensure that they are properly tightened 9 Operate rockshaft several times until it operates smoothly 10 Stop the engine and check the hydraulic reservoir oil level Fill as needed Check all line connections for leaks tighten 1f necessary 11 Lower the tractor to the ground 12 Drive tractor in forward and reverse several times until transmission operates smoothly 4 16 SECTION 7 REPAIR 1 TRACTOR SPLITTING FRONT Note It is not necessary to remove the flywheel housing from the engine unless engine is being removed Split the tractor between the tunnel and flywheel housing as outlined in the story below Prepare the Tractor Remove any mid or front attachments and mid 2 Park tractor on a level surface Engage park brake shut off engine 3 Disconnect battery negative terminal 4 Remove floor mat 5 Remove the operator s platform 6 Remove LH and RH closeout panels 7 Remove seat and seat platform 8 Remove fenders
68. Loose or broken wires Glow monitor Defective glow timer light does not Defective glow monitor light or illuminate monitor and warning check unit All glow Discharged Battery pies comet Loose or defective battery cable heat red connections Burnt out fusible link Faulty wiring Individual Defective glow plug oes ro b i 10 17 Countermeasures Inspect and renew Check circuit before re connecting power Inspect circuit tighten connections or renew wiring Check and renew Check and renew Inspect and renew Check circuit before re connecting power Inspect circuit tighten connections or renew wiring Inspect circuit tighten connections Countermeasures Check battery and charge or renew Inspect clean and tighten connections Check and ensure connectors securely engaged Inspect and renew Check circuit before re connecting power Check glow plug circuit wiring and repair or renew Check and renew Check and renew Inspect Clean or renew Inspect secure repair or renew wiring Check and renew See Light system troubleshooting 4 STARTING SYSTEM Problems Starter motor does not spin Engine cranks slowly Causes Discharged battery Defective stop light switch Defective key switch Defective starter motor connections or loose battery connections Faulty starter motor Defective master brake pedal Faulty reverse or forward pedal Defective push switch Defective controller Discharged b
69. ME 1 HE r ka 1 Fig 9 34 Lift arm 9 Adjust the angle of the roll bush from horizontal is 30 10 Apply grease to the roll bush 11 Apply grease to the cylinder case and lift arm face Which touched with each other 12 When assemble the lift crank on the lift shaft mesh their splines using the alignment marks which were put there before disassembly 13 Hex bolt M8 X20 should be locked by wiring after installation 14 Be sure the lift shaft should be moved smoothly after installation 15 The clearance of lift arm should be less than 3 mm Fig 9 35 Slow return check valve 16 Rap the plug with sealing tape 17 Tighten the slow return valve to the specified torque 1000 1200 kgf cm and be sure not to damage the O ring 9 18 2 LINKAGE INTERNAL I Before installing the linkage apply grease to relayed drive parts 2 Drive in the roll pin into the linkage pin through the rod and lock the pin with wire 3 Be sure not to over operate within specified spool stroke 12mm between up and down at neutral position ao T d I Fig 9 36 Linkage internal 9 19 3 LINKAGE EXTERNAL Fig 9 37 Linkage external 9 20 4 MAIN CONTROL VALVE 4 1 GENERAL DESCRIPTION This valve controls the lifting and lowering operation of the hydraulic cylinder It has especially been developed to control the working height of the implement It consists of a feed back valve direction control valve flow c
70. Motor valve plate Dowel pin Mn NOTE pump and motor valve plates are very similar in appearance but are not interchangeable Note shape of valve plates when removing Valve plates are not fastened to back plate but may adhere slightly because of oil between the machined surfaces 3 Remove cam washer from back of motor housing Shaft Removal and Disassembly 2 Remove valve plate from the back plate 3 Remove two dowel pins NOTE Unless spring pin used to locate valve plate is damaged or loose do not remove If replacement 1s necessary use care not to scratch the machined surface of the back plate Rotating Unit Removal and Disassembly a 1 Remove the internal snap ring retaining the seal 2 Gently tap the shaft with a plastic hammer until the seal release from the housing NOTE Use care when removing shaft from housing to prevent shaft from falling to floor and being damaged 1 Invert the motor and remove the rotating assembly from the housing 2 If the pistons did not come out with piston block remove the pistons along with the spider and pivot 4 33 Thrust washer Thrust Bearing Thrust washer mm snap ring MZ Seal Internal Snap Ring 3 Remove the seal and washer 4 Remove the retaining ring from the shaft Remove thrust washers and thrust bearing 5 Inspect the shaft for damage in the bearing and spline area 6 Inspect the thrust bearing and washers fo
71. NERAL DESCRIPTION 7 1 SECTION 2 SPECIFICATIONS 7 2 SECTION 3 DISASSEMBLY INSPECTION AND REASSEMBLY 7 3 1 Rear axle housing and brake system 7 3 1 1 Disassembly 7 4 1 2 Inspection 7 4 1 3 Reassembly 7 5 SECTION 4 TROUBLE SHOOTING 7 7 Chapter 7 Rear axle and brakes 1 GENERAL DESCRIPTION The rear axle system is of the central axle type which contains the final reduction gears differential gears with diff lock and brakes The power from the engine is transmitted to the right and left wheel pinions through the differential gears and reduced in the revolution to the rear wheels by the wheel gears A wet multi Disc mechanical operated brake system is employed Each of the brakes has 2 friction plates and can produce significant braking force with excellent durability The two actuators work to push their friction plates in opposite directions that 1s outward so that stable braking force can be realized in both forward and reverse movements of the tractor A dif lock mechanism which is housed in th
72. NNW 6 Zp A Es gt S 7 CF 3 K op WS w Pinion metal Or O Fig 5 27 h Release the lock of nut and remove the nut Fig 5 25 MID PTO Case b Disconnect Case Brake LH and Case Brake RH by loosening bolts as shown in Fig Crimping Metal brake plate brake 1 Push out drive pinion 2 from drive pinion metal on a press j Remove the bearing from the drive pinion with a special tool Fig 5 26 c Remove metal brake and plate brake as a set d Remove ring gear 2 as a set e When disassembling the ring gear set further remove bearing 22 with a puller 5 17 2 PTO shaft and related parts Gear spur12 2 R B B 6305 3 C ring shaft 4 R B B 6205 5 Gear spur 14 6 C ring shaft 7 C ring hole 8 Seal 62 9 Shaft PTO 10 C ring shaft 11 R B B 6205 12 Gear spur 37 13 Collar 35X50X2 14 R B B 6207 15 C ring hole 16 01l seal 17 Cover 18 Bolt 19 Hook rear PTO 20 Lever rear PTO 21 Stay PTO shift 22 Shifter PTO Low speed i Sak J i E aN a Remove the rear hitch and the trailer hitch es IN lt AAN b Extract PTO shaft stay 21 rearwards and take A MING NG out shifter 22 ES ligt 4 WO 9 Ji a c Be alert to the steel ball which may spring out E UEM qn NT of the shifter Extract PTO shaft 9 rearwards ES B AN and remove the change gears and related parts d Remove gear spur 12 1 SSS WW LAS SD o V
73. ORTANT Make sure that the hydraulic fluid is visible in sight glass Insufficient hydraulic fluid could cause system to run dry and damage pump and motor IMPORTANT Do not allow valves to relieve for more than 10 seconds or hydraulic oil may overheat Procedure l park tractor on a level surface 2 Turn key switch to OFF position 3 Make sure 4WD lever 1s in unlocked 2WD position 4 CAUTION AVOID SUDDEN TRACTOR MOVEMENT Tractor could move suddenly causing severe injure or damage to equipment during test procedure Perform test in open area keep all personnel away from front or rear of tractor 4 Start engine and run until hydraulic oil is warm 5 Stop engine 6 Cycle all controls to relieve any pressure that may be in the hydraulic system Forward test port Reserve Test port Hydraulic oil filter 7 Locate test ports on hydrostatic transmission inside tunnel opening 8 Remove test port plugs 9 Install one JT05480 male quick coupler into each test port IO Attach JT03362 gauge and hose assembly as shown each test port adapter 11 Position gauges so they can be read from operator s seat 12 Perform test from operators seat Make sure park brake in engaged and press right and left brake pedals Place range transmission shift lever in 3 high position Start engine and run at full throttle A CAUTION If brake fail to prevent wheels from turning STOP TEST IMMEDIATELY Repair or adjust brakes are neces
74. OW RETURN CHECK VALVE Flow control valve Maximum pressure 280 kgf cm Gear oil Cylinder port leaks 1 cc min at a pressure of 90 kgf cm SAE 80 90 at a temperature of 50 toC 7 MAIN CONTROL VALVE Cylinder port leaks 5 cc min or less under a pressure of 100 kgf cm Gear oil SAE 80 90 at a temperature of 50 5 C Clearance between 0 01 mm main spool and casing 8 MAIN RELIEF VALVE T303HST T353HST a 16045 kef cr BEEN 9 MAIN GEAR PUMP T303HST T353HST 21 5 min Efficiency of 92 at 2600 rpm 10 SUCTION FILTER Rated flow Filtration density 11 LINE FILTER Rated flow 35 min Filtration density 8 ELECTRICAL EQUIPMENT DBATTERY 1 BATTERY TERMINAL POST Terminal voltage a a O 12 V 10 8 V Charge or replace 2 BATTERY CELLS Damage Replace battery 3 ELECTROLITE Specific gravity 1 24 1 26 ss Correct Level As specified on Replace with distilled case water 2 METER PANEL AND OTHER SWITCHES 1 STARTER SWITCH 19 3017 50BRAC Replace a defective GLOW 3 Continuity Across Each Terminal switch assembly START 2 2 COMBINATION SWITCH Light switch color RY Y BR O Replace a defective n Continuity Across Each Terminal switch assembly 3 Turn signal switch O Turn signal switch 4 Horn switch O Horn switch 6 PTO SWITCH Continuity across each terminal color B LW odin OFF ON Switched on when lever is
75. Replace missing or damaged safety signs Keep your tractor in proper condition and do not allow any unauthorized modifications to be carried out on the Tractor which may impair the function safety and affect Tractor life PROTECTION CHILDREN Keep children and others away from the Tractor while operating BEFORE YOU REVERSE Look behind Tractor for children Do not let children to ride on Tractor or any implement 1 6 HANDLE FUEL SAFELY AVOID FIRES Handle fuel with care it is highly flammable Do not refuel the Tractor while smoking or near open flame or sparks Always stop engine before refueling Tractors Always keep your tractor clean of accumulated grease and debris Always clean up spilled fuel STAY CLEAR OF ROTATING SHAFTS Entanglement in rotating shaft can cause serious injury or death Keep PTO shield in place at all times Wear close fitting clothing Stop the engine and be sure PTO drive is stopped before making adjustments connections or cleaning out PTO driven equipment ALWAYS USE SAFETY LIGHTS AND DEVICES Use of hazard warning lights and turn signals are recommended when towing equipment on public roads unless prohibited by state or local regulations Use slow moving vehicle SMV sign when driving on public road during both day amp night time unless prohibited by law PRACTICE SAFE MAINTENANCE Understand service procedure before doing work Keep the surrounding area of the Tractor cle
76. S 1 a t MY EN 1 Z O 0541 POP gy A x gt 3 Si 3 a P s Ei lt Ao 03 a 5 ag E 5 38 CHAPTER 6 FRONT AXLE CHAPTER 6 FRONT AXLE 4WD 6 1 SECTION 1 GENERAL DESCRIPTION 6 1 SECTION 2 SPECIFICATIONS 6 2 SECTION 3 DISASSEMBLY INSPECTION AND REASSEMBLY 6 3 1 Center pivot 6 3 1 1 Disassembly 6 4 1 2 Inspection 6 4 1 3 Reassembly 6 4 2 Front differential 6 6 2 1 Disassembly 6 7 2 2 Inspection 6 7 2 3 Reassembly 6 8 3 Final case 6 10 3 1 Disassembly 6 11 3 2 Inspection 6 12 3 3 Reassembly
77. ST Workshop manual FOR TRACTORS CODE NO Printed on April 2008 1st EDITION Edited by overseas service team
78. Should be free of scratches and wear marks IMPORTANT Piston face damage can be caused by towing unit dry start up or loss of charge pressure Piston Block Disassembly NOTE Disassembling the piston block assembly is not necessary unless the spring or pins are damaged A CAUTION The spring inside the piston block is pressed and should not be removed without compressing the spring first Use the following procedure to remove the spring safely The following parts will be needed to disassemble the piston block 2ea 3 8 IDX1 1 4 in OD flat washers lea 3 8X Sin N C cap screw lea 3 8 in N C nut lea 1 2 in Drive Socket with 1 1 8 in OD 12 Place one of the flat washers over the 3 8X5 in cap screw through spline end of piston block so that the washer rests on the three pins 13 place the socket and then the washer over the end of the cap screw 14 Screw the nut on and slightly compress the spring inside the piston block 15 Use retaining ring pliers to remove the internal retaining ring 16 Carefully back off tension on nut until spring is slack 1 7 Remove the nut Washer and cap screw Retaining Ring TN QN Q z 9 A Pins Washers retainer 18 Remove washers spring pins and pin retainer 19 Inspect the spring inside the piston block for damage Inspect pins for straightness 8 HYDROSTATIC MOTOR ASSEMBLY IMPORTANT Due to extremely t
79. TYM WORKSHOP MANUAL FOR TRACTORS T303HST T353HST BYUCKSAN GROUP TONG YANG MOOLSAN CO LTD www LYIN1 co kr 604 9 Namsan dong Changwon city Kyungnam Korea MTEL 82 55 279 4379 FAX 82 55 279 4447Mwww tym co kr HST TRACTOR T303HST T353HST WORKSHOP MANUAL Chapter 1 Introduction 01 Chapter 2 Disassembly and reassembly of major point 02 Chapter 3 Engine accessories 03 Chapter 4 HST system 04 Chapter 5 Transmission 05 Chapter 6 Front axle 4WD 06 Chapter 7 Rear axle and Brakes 07 Chapter 8 Power steering system 08 Chapter 9 Hydraulic system 09 Chapter 10 Electric accessories and instruments 10 Chapter 11 Service standard and other information 11 Chapter I Introduction INTRODUCTION 1 1 SAFETY INTRODUCTION 1 2 WARNING SIGNS IN THIS MANUAL 1 5 SAFETY SIGNS 1 6 SAFETY DECALS 1 11 UNIVERSAL SYMBOLS
80. WD change 25 29 kgf 55 64 lbs Usable limit of shifter disengaging load Main change amp Sub change 17 Kgf 38lbs AWD change 24Kgf 53lbs Wearing limit of each shifter 0 5 mm 0 02 in 3 Reassembly a lubricate the grooves in the shifters b Each shifter should be installed 1n the correct direction c When installing the shifter on the shifter stay Use the special tool as shown in Fig 5 59 Special tool Shifter Ere fan Fig 5 59 SECTION 4 TROUBLESHOOTING 1 WHEEL DRIVE SYSTEM Problems Causes Countermeasures Transmission makes Insufficient or improper lubricant Replenish or replace noise in neutral Excessive splines of change shaft spline hub etc Replace Worn or broken bearings Replace Slide couplings interfering with the gears due to worn Replace or deformed shifters Gears make a noise Improperly disengaged clutch Repair or replace when shifted Clutch pedal play Wear in width of gears splined hubs collars etc Replace Defective Change shift fork Replace Gears disengage by Broken shifter springs Replace themselves SER Wear in width of gears splined hubs collars etc Replace Gears do not engage or Improper disengaged shift lever Repair or replace di NH Gears are locked due to foreign matter between them Remove the foreign matter 5 36 2 PTO DRIVE SYSTEM problem PTO does not spin with PTO shifted to ON PTO spins but does not produce sufficient torque PTO does not stop wh
81. ach other and their backlash 1s within specified range contact 1s in middle of ring gear tooth and is approximately 75 of total tooth width bom Root contact Inadequate backlash Move differential case shims from left side to right side See Assembly and installation ih Moo pu Tip contact p Excessive backlash Move differential case and shims 7m IZ from right side to left side See Assembly and installation y Toe contact Too little engagement Remove some drive pinion support shims See Transmission REAR TRANSMISSION ASSEMBLY Setting cone center shims See TRANSMISSION REAR TRANSMISSION ASSEMBLY Setting cone center Heel contact Too much engagement Add some drive pinion support INSTALLATION OF A NEW PAIR OR RING GEAR AND DRIVE PINION 1 use a new pair of ring gear and drive pinion delivered from the manufacturer Never mix its components with those of other pairs Note Every ring gear dive pinion pairs is adjusted and inspected for tooth contact individually at factory 2 Adjust the backlash between the ring gear and drive pinion to be 0 1 0 2mm 0 004 0 008 in by shimming the drive pinion metal and right and left dif case metal and make sure that their tooth contact is proper 5 22 2 PTO shaft and related parts a Pushing the PTO counter gear end into the bearing until the stop on the gear is securely seated against the bearing The seal should be coated with an adhesive THREE BOND TB1
82. actor 16 Install SCV tube support bracket and tubes as an assembly Install two cap screws and two spacers to attach tube support bracket to frame 13 Install brake rods to brake bell cranks Retain with specified length 1 7 Raise RH rear of tractor and support on suitable stands Remove RH rear wheel and tire 4 22 18 Connect four work port tubes to SCV Tighten tube nuts to 40 57N m 30 43 Ib ft 19 Connect battery negative terminal 20 Install fenders 21 Install seat and seat platform 22 Install LH and RH closeout panels 23 Install operator s platform 24 Install floor mat 25 Refill hydraulic oil reservoir to proper level 26 Bleed air from hydraulic system See HYDRAULIC SYSTEM BLEED PROCEDURE 2 HYDRAULIC TRANSMISSION REMOVAL amp INSTALLATION Removal 1 Park tractor on level surface Stop engine and release hydraulic pressure by operating all controls To avoid injury from escaping hydraulic oil under pressure relief the pressure in the system by stopping the engine and operating all hydraulic components A CAUTION 2 Separate tractor engine and tunnel sections See TRACTOR SPLITTING FRONT 3 Remove two cap screws two spacers and two lock nuts and disconnect transmission forward and reverse control rods A CAUTION Hydraulic transmission weights approximately 34Kg 7511b attach a suitable lifting device to transmission before removing screws NOTE 1 screw is removed from
83. aking force 2 Brake noise 3 Brake overheating 4 Brake cannot be disengaged completely 5 Not uniform braking 6 Excessive pedal play Worn or damaged bearing Worn gear or wheel shaft Insufficient depressing of brake pedals Improper pedal free play Worn friction plates Insufficient brake oil Broken actuator spring Eccentric wear of actuator Insufficient oil Excessive pedal free play Improper operation Improper brake pedal free play Broken actuator spring Broken pedal spring Improper free play adjustment Worn actuator ball Improper adjustment of brake rod Worn actuator fork tightening bolt Worn brake shaft or brake arm 7 7 countermeasures Replace Replace Depress pedals positively Adjust Replace Replenish Replace Replace Replenish Adjust Operate brakes properly Adjust Replace Replace Adjust Replace Adjust Replace Replace Chapter 8 Power assisted steering system SECTION 1 GENERAL DESCRIPTION 8 1 SECTION 2 SPECIFICATIONS 8 2 2 1 Gear pump een 8 2 2 2 Steering valve 8 2 2 3 Oil tank 8 2 SECTION 3 FUNCTION 8 3 3 1 Technical D
84. all Use pincers if necessary STEP 7 Place the OSPM in the tool again Lift up steering unit and fixture in one piece and turn it 90 to horizontal Housing spool sleeve 2 Turn the spool set so that the pin in spool and sleeve is horizontal and push it out STEP 8 Bearing 7 Remove bearing from shaft end The outer washer may sometimes adhere to the housing If the washer does not come out with the shaft it will come out when shaft seal item 5 is being pressed out Ring 10 Remove retaining ring for the neutral position springs STEP 9 Cross pin 11 Press the pin out of the spool set Carefully press the spool out of the sleeve Springs 12 Press the neutral position springs out of the spool Dust seal 1 Remove the dust seal ring with a sharp screwdriver Shaft seal 5 Remove the shaft seal with a sharp screwdriver if necessary 4 Cleaning inspection replacement and lubrication Note a Clean all parts carefully b Carefully check all parts and replace imperfect parts if any c Always replace all sealing parts during a repair d Before assembly lubricate all parts with hydraulic oil and grease rubber parts with Vaseline S REASSEMBLY STEP 1 Housing 2 Place the OSPM housing horizontally in the holding tool with the hole for the output shaft facing the tool Note the locating pin in the tool must engage with in the OSPM housing STEP 2 Note
85. all disassembled parts should be kept aside in a clean place such as on clean paper or cloth and be handled carefully so as to prevent them from becoming dirty or damaged Check all disassembled parts for damage and wash undamaged or usable parts in clean diesel fuel or kerosene Inspect all parts referring to these point and repair or replace defective parts 1 DISASSEMBLY DRemove the key Fig 9 14 Drive shaft key Hold the pump in a vice with the mounting flange turned downward and remove the bolts Fig 9 15 Cover bolt 3 Remove front and rear pump Be sure not to be damaged the o ring or steel ball Front pump Rear pump Fig 9 16 Front and rear pump 4 Remove the rear pump gt Detach the cover gt Remove the o ring gt Remove the bushing drive gear gear and bushing Take care of removing the bushing which is marked and recorded gt Remove the bushing seal from the bushing Bushing seal Cover O ring 2 poe Fig 9 17 Front and rear pump D Remove the front pump same as rear pump disassembly O Remove the snap ring and extract oil seal from the flange Oil seal Snap ring Fig 9 18 Front and rear pump 3 REASSEMBLY 1 Install the rear pump gt Install the bushing seal to bushing gt Install the bushing drive gear gear and bushing to the housing gt Install the o ring to the cover gt Install the cover to the housing Bushing seal Cover O ring Bushing Housing
86. an and dry Do not attempt to service Tractor when it is in motion Keep body and clothing away from rotating shafts Always lower equipment to the ground Stop the engine Remove the key Allow Tractor to cool before any work repair 1s caused on it Securely support any Tractor elements that must be raised for service Work Keep all parts in good condition and properly installed Replace worn or broken parts Replace damage missing decals Remove any buildup of grease or oil from the Tractor Disconnect battery ground cable before making adjustments on electrical systems or welding on Tractor 1 7 TRACTOR RUNAWAY 1 The tractor can start even if the transmission is engaged position causing Tractor to runaway and serious injury to the people standing nearby the tractor For additional safety keep the pull to stop knob fuel shut off control in fully pulled out position Transmission in neutral position Foot brake engaged and PTO lever in disengaged position while attending to Safety Starter Switch or any other work on Tractor SAFETY STARTER SWITCH Clutch operated safety switch is provided on all Tractors which allow the starting system to become operational only when the Clutch pedal is fully pressed Do not By pass this safety starter switch or work on it Only Authorized Dealers are recommended to work on safety starter switch On some models Safety Starter switch is provided on transmission High low shifter lever and
87. arate parts piston return sparing brake disc and cover assembly plates 3 2 INSPECTION d While holding return spring 43 compressed with a special tool remove snap ring a Cover assembly Replace a cover assembly which has a damaged or worn sliding surface If there is any damage to the cover assembly and the piston seal ring these parts should also be replaced b Disc assembly If the thickness of a disc assembly exceeds the usable limit mentioned below or combined width of the disc assembly and driven plate is less than 23 8mm 0 937 in replace both the disc assembly and driven plate Inspection for disc thickness and serration wear Inspection Items Usable limit Disc thickness 2 2 0 1mm 1 9mm 0 087 in 0 075 in Surface flatness 0 2mm 0 008 in Fig 5 11 e If the combined thickness of the return plate and brake disc deviates from the specified value replace both parts Inspection Items Specified values Usable limit Combined 5 5 0 18 5mm thickness of 0 217 in 0 2 in return plate and brake disc Fig 5 10 c Driven plate Inspection for deformation and burning A seriously damaged or worn disc should be replaced Inspection Items Specified values Usable limit 0 2mm 0 008 in Surface flatness d Brake disc Inspection for deformation and burning A seriously damaged or worn disc should be replaced Inspection Items Specified values Usable limit Disc thick
88. are KT202417 25 Bolt 3 Bearing ball 6203 14 gear spur 23 16 26 Washer 4 Shaft MID PTO 15 Spacer 27 Boss 5 Bearing ball 6004HL1 16 C ring 28 Spring shifter 6 Washer 20X30X 1 8 17 Counter shaft 1 29 Ball steel 7 C ring9shaft 18 Gear spur 25 30 Arm comp 8 Gear spur 16 19 C ring 3 O ring 9 Washer 17X25 X3 20 Bearing ball 32 Arm comp shifter 10 C ring hole 21 Collar 17X24X6 33 Pin 11 Oil Seal 22 C ring 34 Bolt M8X20 12 Counter Shaft 2 MID PTO 23 Pin 5 29 5 2 MID PTO CASE SUB ASSY l case MID PTO 2 Bearing Ball 6203 3 Plug Fig 5 52 Note When pushing the R B B s 6203 into the CASE be careful only to push their outer races 5 3 Gear Spur 25 sub assy IGear spur 25T SA AN 2 snap ring hole WE 3 Bearing Ball 6203 A Note When pushing the R B B s 6203 into the gear be careful only to push their outer races Fig 5 53 5 4 MID PTO shaft sub Rearwards Fig 5 54 GM Note When pushing the R B B s 6004 into the shaft be careful only to push their outer races The snap ring C should be securely seated in the groove and the press processed side turned towards the rearward side 5 30 5 5 MID PTO shift metal SUB 1 Boss 2 Spring shift 3 Steel ball 4 Arm comp 5 O ring 6 Arm comp MID PTO shift 7 Spring pin Note 1 When installing arm comp 6 take care not to mix the longer dimension 2 When installing the O ring take care no
89. ata 8 4 SECTION 4 DISASSEMBLY INSPECTION AND REASSEMBLY 4 1 Major component 8 6 4 2 Special tools 8 7 4 3 Disassembly 8 7 4 4 Inspection 8 8 4 5 Reassembly 8 8 SECTION 5 TROUBLESHOOTING nn 8 12 Chapter 8 Power assisted steering system SECTION 1 GENERAL DESCRIPTION The hydraulics of this power assisted steering system are actuated by a specially designed steering valve system Non Load reaction valve blocks the L R cylinder ports in neutral condition and does not transmits the reaction load of the tire to the steering wheel in neutral Generally the system is used for the vehicles that treat heavy equipment or low speed traveling Hydraulic circuit consists of Independent system The oil from tank flows into gear pump of orbitrol via filter and the quantity of oil in the proportion to the rotations of steering wheel flows into stee
90. attery Excessive resistance 1n starter circuit Defective starter motor Tight engine 5 CHARGING SYSTEM Problems Battery is low in charge or discharge Alternator is charging at high rate Battery 1s overheating No output from alternator Causes Loose or worn alternator drive belt Defective battery It will not accept or hold charge Electrolyte level 1s low Excessive resistance due to loose charging system connections Defective alternator Defective battery Defective Alternator Alternator drive belt 1s broken Loose connection or broken cable in charge system Defective voltage regulator Defective alternator 10 18 Countermeasures Check battery and charge or renew Check and renew Check and renew Check clean and tighten connections Inspect repair or renew Inspect and try to push brake pedal Inspect adjust neutral Check and renew Check and renew Check battery and charge or renew Check circuit connections and repair or renew faulty wiring Refer to the engine manual Refer to the engine manual Countermeasures Check and adjust belt tension or renew Check condition of battery and renew Check clean and tighten circuit connections Check and repair or renew Check condition of battery and renew Check and repair or renew Renew and tension correctly Inspect system tighten connections and repair or renew faulty wiring Check and renew Check and repair or re
91. aul such as running clearances and torque values have been provided in interline of Inspection and reassembly procedures of each group section This manual was compiled from latest information available at time of publication Manufacturer reserves the right to make changes at any time without notice Whenever the terms left and right are used They means as viewed by the operator when seated in the operator s seat 1 1 SAFETY INSTRUCTION ALWAYS PRACTICE SAFETY BY THINKING BEFORE ACTION AVOID FIRE HAZARDS Keep fire extinguishers easily available and in good operating condition All relevant personnel should know how to operate fire fighting equipment Keep a first aid kit in an easily accessible location Do not smoke while handling fuel or other highly flammable material Do not use an open pail for transporting fuel Use of an approved fuel container Dispose of all fuel soaked rags in covered containers where cigarettes cannot be dropped carelessly Do not smoke and avoid open flame when charging jumping or boosting batteries Batteries give off gas which is flammable and explosive Do not charge batteries in a closed area Provide proper ventilation to avoid explosion of accumulated gases Avoid acid burns Wear safety goggles when handling battery electrolyte It contains sulfuric acid which is a poison and can cause blindness Avoid it contacting eyes skin or clothing sulfuric acid will eat through clothing
92. bush should not damaged 3 Pay particular attention to the installed direction of thrust collar that 1s with the sharply edged face turned towards the bevel gear case 4 When the thrust collar has been replaced or the fore and aft play of the front axle exceeds the usable limit correct play by screwing in the adjust bolt on the top of the pivot metal F Note After correcting the pivot metal play tighten the lock nut of the adjusting bolt to a torque of 11 7 13 7KN cm 1200 1400 kgf cm 5 The reassembled front axle should rock smoothly while pivoting 6 When the tie rods are reinstalled the toe in should be adjusted At the same time the steering angles of the both wheels should also be adjusted 7 Be sure the dimension C and D is same size and Adjust E and F as same dimension A Forward Top view B Fig 6 8 Be sure to bend Joint Ball LH Bolt fine Joint Ball RH Ball joint Confirm that there are no foreign matters or oil etc Fig 6 9 2 FRONT DIFFERENTIAL Fig 6 10 Oil seal 3 Pinion bevel ST 4 Gear bevel 35T 5 Case front Diff 6 Pinion Diff 12 7 Thrust collar 8 Gear diff side 20 9 Washer thrust 10 Pin spring 11 Shaft diff pinion 12 Pin spring 13 Bearing Ball 6212 14 Snap ring 15 Snap ring hole 16 Shim A 17 Shim B 18 Bearing taper roller 19 collar 20 Nut M30 21 Bearing ball 6211 22 Shim 2 1 DISASSEMBLY 1 As concerns operation prior to removal of the fr
93. check for damage or debris in spring or seating areas Clean or replace parts as required 12 Remove the filter bypass valve and check for damage or debris in spring or seating areas Clean or replace parts as required 13 Inspect the motor side needle bearing Bearing should spin freely and needles should not fall out of bearing cage If replacement in necessary remove using a suitable blind hole puller 14 Remove three plugs from pump side and one plug from motor side of back plate and clean out oil passages using a suitable solvent and compressed air 4 25 v A AY t ds 5 i k NOTE If neutral adjustment cap screw 1s loosened neutral adjustment procedure must be performed see HYDRAULIC PEDAL AND NEUTRAL ADJUSTMENT 15 Inspect pivot and cam followers on neutral return lever for smooth operation Replace parts as needed Back plate Assembly 1 On motor side of the back plate install the filter bypass valve Tighten to 16 20N m 12 151b ft NOTE Cooler bypass valve spring and charge relief valve spring could accidentally be mixed up Charge relief valve spring is thicker 2 Install the cooler bypass valve Tighten to 28 33 N M 21 24 Ib ft IMPORTANT Old O rings gaskets and seals will leak Always install new O rings gaskets and seals during assembly 3 Install new O ring to plug Install plug Tighten to 13 16N m 115 142Ib in 4 On pump side of back plate install new O ring to the three plugs Instal
94. d wash spool clean If it is damaged seriously replace it as an assembly If damage is minor correct surface with oil stone and finish by lapping Even when spool is shifted to up position lift does not rise DStuck compensator plunger unloading valve 1 Clogged orifices or slanted orifices in pilot passage S Stuck poppet unloading valve 2 4 Bitten or stuck check valve plunger 14 Broken slow return check valve DStuck poppet Lap after repairing flaws with oil stone Clean them with compressed air or a sharp point Correct minor flaws with oil stone Lap after repairing flaws with oil stone Lap after disassembling cleaning and repairing flaws with oil stone 9 27 Problems Causes Countermeasures 2 Too low 1 Above causes can also be Repair according to above instructions rising speed of possible lift 2 Too small a spool stroke in Inspect readjust or replace link mechanism control valve if necessary 3 Broken compensator spring Replace spring unloading valve 1 in control valve 4 Stuck poppet Correct minor flaws with an oil stone unloading valve 2 3 Lift lowers even 1 Stuck poppet Lap after disassembling cleaning repairing when adjust knob flaws with oil stone adjust Hale 2Poor valve seat adjust Handle 2 Poor valve seat Replace valve While engine is 3 Poor O ring Replace stopped 4 Lift does not 1 Slow return check valve Turn knob to fast position lower knob is tu
95. e cylinders From the cylinder block coolant is directed through the cylinder head and into the thermostat housing With the thermostat open coolant passes through the housing and upper radiator hose into the top of the radiator where it is circulated to dissipate heat Thermostat Lower tank FIG 3 1 Cylinder head al Cylinder body Coolant flow when engine is hot Coolant flow when engine is cold FIG 3 2 3 2 Radiator The radiator consists of radiator cores a tank to Flow coolant side plates to install the radiator and a fan guide Fin tube type cores are used and the cores and tank is made of anti corrosive aluminum and aluminum alloy A COOLANT PASSAGE B AIR C FIN D TUBE 3 2 3 SPECIFICATIONS Description Radiator core type Core train number Radiator fin pitch Thermal radiator area Pressure valve opening pressure Coolant capacity Test pressure 4 REMOVAL OF THE RADIATOR 1 Release the clamp and remove the upper hose 2 Release the clamp and remove the lower hose 3 Release the hose clamp and remove the water drain hose Note Refer to the paragraph SEPARATION OF THE ENGINE AND THE FRONT AXLE BRACKET in chapter 2 for operation up to this step When removing the radiator take care not to damage the radiator cores and oil cooler 5 INSPECTION OF EACH PART 1 Inspection for radiator water leaks Water leaks are liable to occur
96. e face NOTE The relief valves are dual purpose valves Each valve contains two springs A weak spring check valve when other circuit 1s in use and a strong spring 6000psi relief valve Valves can not be adjusted and there 1s no serviceable parts inside If any malfunction is suspected replace the relief valve Valve face 56 Examine the relief valve faces and the seats in the back plate The faces of the check valve and the seats in the back plate should be free of burns and defects Charge pressure relief valve IMPORTANT Damage to pump may occur if charge pressure relief valve and cooler bypass valve springs are accidentally swapped Keep valves and springs separated or label them to prevent mix up 9 Remove the charge pressure relief valve and check for damage or debris in spring or seating areas Clean or replace parts as required IMPORTANT To avoid damage to needle bearings When removing or installing press only against side of bearing with lettering When removing bearings from the back plate be Extremely careful to not damage machined surfaces 10 Inspect pump side needle bearing Bearing should spin freely and needles should not fall out of bearing cage If replacement 1s necessary press bearing out from the motor side of the housing Cooler bypass valve _ a E ws 3 4 a 3 Needle bearing ae 11 On the motor side of the back plate remove the cooler bypass valve and
97. e right hand rear axle housing is employed to lock the differential gears and is activated by depressing the dif lock pedal resulting in the same rotary speeds of both wheels 1 ec ep MNT m I Ay lar By 2 m Ai a A EN 0 UA RI ea m el Ium 3 ES dl HS TUR day AE pi por Al al Z TUN ALIE LESS S roa zzi il a A AR a CT a umy auf Nl da YW B if al Mi M a t v ZZ EZA p it P PETERS AL QS ah lt a7 pra Ce ZA m 4 ll l B r Wn k 0 E a iaa m s jj EVA jf dM Ji i o pe T F IL T E a ae NOD je UE Mion hee Mt 0 Mil N SSS 4 Qe ES S S SJ WY Fig 7 1 7 1 SECTION 2 SPECIFICATIONS Final reduction gears Brake system Friction Plate Separator Plate Type Reduction ratio Type Outer diameter Thickness Lining material Number of plates Outer diameter Thickness Number of plates Metal brake assembly Installed thickness Total brake thickness 7 2 T303HST T353HST Helical gears 0 1852 10 54 Wet multi disc Mechanically operated 210 mm 4 7mm Paper 2 on each side 212 mm 2 5
98. ear ratio 1 T NM Strainer 400mech 35 micron 4 8 6 2 Hydrostatic system schematic External cylinder 1 out put cover Ei Safety va lve eH Gear ratio 1 a I Flow divider L l l Strainer i l 80mesh UE DIA o p E x I I I Fsp 3Kgffcm EE B i Pressure i Control Valve I i P1 3kgf crn2 i SS NEED 3 i em OSE P4 18K t crn2 cce uec eque wie uE On A I 1 I QN EAE IR 3 oat Eu o ecd Unloading valve AA ina W MEME Relief valve PTO Clutch E ill Slow return check valve 45 5kgf cm2i i Td l at 20 0LPM l ha mm i I re cy linder hh Se I 1 P l I J I i EO Q a 68 PT a T cm H H m i 0 jato 1 0 3LPM 1st pump 2nd pump l IL rated 2800rpm Scc rev 6 8cc rev y NIS E 1 Strainer 400mesh i l 25micron i SECTION 3 TROUBLESHOOTING Problem or symptom 5 IOJOJA Jo duund Aston NOYIIM SIAQUI JO OU Jl Check or Solution ISIDADI IO PIVMIOJ SutissoJd c a e 0G E 3 gt 2 5 O sE o e J Co 2 E UN ae epod asI9A9yY JO pIe MIOH USYM IAOJ JOU SIO 10121 2 O C em e em C E Q E gm CD C em E
99. ease or replace 4 Seizure or poor lubrication of axle end bush Grease or replace Vibrating or pulling steering wheel 1 Unbalanced wheels Adjust balance 2 Wheel deflation Repair or replace 3 Unequal diameter of both tires Adjust inflation or replace 4 Loose worn or damaged wheel axle bearing Repair or replace 5 Loose worn or damaged wheel steering wheel shaft Retighten or replace 6 Worn final case bush Replace 7 Loose final case front axle tightening bolt Retighten 8 Loose front wheel tire tightening nuts1 Retighten Q Steering wheel tends to turn to the right or left while traveling on straight paved road 1 Deflected wear of tire 2 Different tire diameters Replace Adjust inflation or replace 3 Damaged final case bearing Excessive or eccentric wear of tire I Improper tire inflation 2 Worn front wheel shaft bearing 3 Poorly adjusted toe in 4 Front wheel drive is always engaged Replace Adjust Replace Readjust correctly 2 6mm 0 08 0 24 in Engage FWD only when required UI KENNEN NN 1 Loose fasteners 2 Worn or damaged final case bearing 3 Worn bush 4 Wear or poor movement of tie rod end 5 Excessive backlash of differential and bevel gear Tighten correctly to specified torque Replace Replace Lubricate or replace Adjust O Different steering angles in both directions NEM DLengihs of RH and LH te rods are differen CHAPTER 7 Rear axle and brakes SECTION 1 GE
100. ected during This operation Air cleaner Radiator Power steering system Oil cooler Engine front part 1 Removal 1 Hold or support the engine with a crane or stands 2 Hold or support the front bracket or the axle bracket in a manner that the part other than the engine can be removed if required 3 Remove the damper and Engine hood 31 ML s e fF N r ia 1 FIG 2 7 Wiring harness 4 Disconnect the positive and negative battery cables FIG 2 8 Battery 5 Open the front grille 6 Detach the head light wiring 7 Remove the other wiring 8 Remove the inlet pipe from the air cleaner 9 Remove the air cleaner Note Here the air cleaner can be removed as an assembly 10 Remove the upper hose lower hose and drain hose from the radiator Note The radiator should be drained of the coolant ahead of time 11 Remove the fuel filter AA atl gt Fuel filter b e amp 2 PA Fig 2 9 Fuel filter 12 Remove the radiator and oil cooler from the axle bracket lie sere ate siete tae 7 48 2 6 Fig 2 10 Oil cooler 13 Remove the battery and battery bracket 14 Remove the two hoses for the power steering system 15 Remove the mounting bolts of the right hand pivot metal support ahead of time 16 At this stage the power steering unit can be removed by disconnecting both right hand and left hand tie rods and remov
101. ed clean and There should be no sharp edge to the surface of thrust washer d When assemble the spring pin Be sure the spring pin should be different direction 05 and 23 e When any of the bevel pinion ring gear TRB collar etc has been replaced inspect the bevel pinion assembly for thrust play in the front axle housing 0 1 0 3 0 004 0 011 in Specified thrust play mm in Snap ring Fig 6 16 3 DIF CASE AND BEVEL PINION Oe J Fig 6 17 1 Each friction surface should be coated with grease in advance 2 The bevel pinion and the ring gear make a distinct pair after a mesh adjustment performed at the factory Consequently when reassembling the pair be sure to pair parts with a same reference number 3 When installing the TRB s from the bevel pinion Be sure the calking of the lock nut and the bearings 4 Install the snap ring and the bevel pinion can then be installed together with the TRB s Fig 6 17 6 9 Thrust washer thrust washer 1 00 molibden grease 1 shim 2 shim 3 shim 4 Parallel pin Note Discard the removed straight pin and oil seal and install a new pin and Oil seal when reassembled because this pin and oil seal is apt to be damaged when removed 5 Install the bearings from the Axle housing And the ring gear and then the ring gear can be assembled from the Axle housing 6 Install the straight pin 4 which retains the axle housing 7 When any of
102. en PTO switch 1s shifted to OFF PTO follows too much when PTO switch 1s shifted to OFF Causes PTO shift lever is in neutral Defective PTO switch Clogged PTO valve Poor Pump Defective solenoid valve Worn clutch disc Broken or fatigues seal ring at clutch Loose joint or broken O ring of delivery valve Poor pump Clogged PTO valve Defective PTO valve solenoid Poor PTO valve contamination Broken clutch piston return spring Poor switch Improper oil Insufficient warming up Poor PTO clutch brake Weak or broken piston return spring Poor PTO valve contamination Deflected clutch plate Counter measures Shift lever positively to ON replace Wash clean Replace Replace Replace Replace Retighten or replace Replace Wash clean Replace Wash clean Replace Replace Replace Let tractor warm up sufficiently Replace Replace Wash clean Replace Fig 5 60 gt 35 d eo kl me o aS pd c t v m lt i c c INVHD VIG NIVAL HHAOd gt c 2 lt 3 _ lt 2E E 2 S e 09 a E B zo 6 T NO al za Cm Pla se Els JA oeil INO E dosis doc M L mper m PRECIO WI NMTT 0 80 0 Wo jsy g onbso TN z oma i L MM PIED T qo A ddy STZTAL 3AIS9Yp y Addy A SHEET T8 len Hm GET lE Ts iN EE a S Be e lE Al Eire 4 At DE
103. er l l l 6 Th cum brake Gan be disassembled by Standard thickness mm in 4 7 0 185 removing Nut Usable limit mm in 4 3 0 169 Note Be careful to keep the friction surfaces of the linings Note brake metals free from damage and foreign matter Also replace those whose grooves have been worn out completely even if only on one side 7 4 2 Metal brake 4 Wheel shaft Check the pressure plate and brake rod for Check the shaft for abnormalities like wear abnormality Replace defective parts Replace the damage etc and replace a defective one metal brake whose thickness exceeds the usable limit 5 Bearings Standard thickness mm in Usable limit mm in Note Slight scratches on the friction surface can be corrected with sandpaper 1000 3 Separator plate Measure the thickness and replace the plate whose thickness exceeds the usable limit or whose surfaces are damaged Fig 7 9 Standard thickness mm in Usable limit mm in Check them for abnormalities like hitching irregularity etc in rotation after being washed clean Replace defective ones 6 Oil seals Removed oil seal should be replaced with a new one when reassembled 1 3 REASSEMBLY Reassemble the parts in reverse order of disassembly follow these precautions 18 0 708 1 Make sure that oil grooves friction surfaces etc 17 5 0 688 of the brakes are free from matter such as dust iron powder etc to avoid brake lining da
104. er and thrust bearing on shaft Install the outside thrust washer and snap ring 6 Install the shaft into the housing Install the washer and the new shaft seal Secure them with the retaining ring Rotating Unit Assembly and Installation I If the piston block assembly was disassembled complete the following If not skip to step 10 Retaining Ring N Spring 96 C ps Pins Washers bw retainer 2 Install the three pins in oversize grooves in spline end of piston block with the heads facing inside of the block 3 Install the pin retainer 4 install the washers and spring 5 Using same tools used to compress spring during disassembly of block install washer spring second washer cap screw and nut in the piston block 6 Compress spring 7 Install retaining ring 8 Remove spring compression tools from the piston block Pivot Shoe face 9 place an appropriate size socket in the hole in the piston block to keep the pivot in place while installing the pistons 10 With the pistons in place in the spider lower the pistons into the piston block NOTE It is not necessary to put the pistons in the original position Any piston can be installed in any hole 11 Tilt the motor housing so that the open end is facing slightly downward 12 Slide the rotating unit up the shaft until it meshes with the splines on the shaft E E a Motor OT C2 Dowel pn E 13 1f removed install the spring p
105. er hoses should be clamped securely and must not interfere with the cooling fan The radiator cores must not interfere with the cooling fan 7 DAILY INSPECTION 1 Coolant level inspection and coolant replacement When the radiator is hot after operation be sure to wait until the coolant cools down sufficiently before removing the radiator cap If this is not done heated vapor might burst out and cause burns Use fresh water from a faucet as the coolant When the coolant is replenished or changed let the engine idle for a while for the coolant to circulate sufficiently in the cooling system and replenish if necessary after stopping the engine 2 Antifreeze When The weather is cold use an antifreeze to prevent the engine from freezing The freezing point differs according to the mixture ration of water and antifreeze Therefore prepare an antifreeze solution which will have a freezing point 5 C lower than the estimated lowest atmospheric temperature in your environment Precaution for filling antifreeze The radiator interior should be washed clean ahead of time As concerns of mixing ratio of an antifreeze follow its manufacture s instructions Antifreeze should be blended well with water before filling When the coolant level is lowered due to evaporation maintain the level by adding water not by using an antifreeze solution When the coolant level is lowered due to leaks maintain the level by adding an antifreeze sol
106. ering Control Unit 5 Hydrostatic Unit 4 3 ission 2 Hydrostatic transm 7 Charge pressure relief Valve 1 Input shaft From engine 8 Filter mount port 2 Control Lever 3 Back Plate 9 For amp Rev Relief valves 10 Hydrostatic pump 4 Hydrostatic motor 4 4 3 Transmission main pump case 5 O ring 6 Bearing 9 Cam plate 10 Cam washer 11 Rotating Assembly 15 Cover 16 Plug 17 O ring 1 Cap screws 6 2 Washers 6 3 Cover 4 Seal 7 Shims 8 Housing 12 Valve plate 13 Bearing 4 14 O ring 18 Bearing 19 Snap ring 20 Thrust Washer 21 Thrust Bearing 22 Thrust Washer 23 Snap ring 24 Seal Washer 25 Seal 26 Snap ring 27 Shaft 4 5 4 Transmission back plate and motor 5 back plate 6 Cap screw 7 Bearing 13 Plunger 14 poppet 11 Poppet 12 Spring 19 Filter head 20 O ring 1 Bearing 2 Gasket 3 Pin 4 Pin 8 plug and O ring 10 Spring 15 Spring 16 Shims 17 O ring 18 Plug 2 Relief valves Forward and reverse 22 Plugs 23 Valve plate 24 Rotating assembly 25 Cam washer 26 Motor housing 27 Cap screw 28 Bearing 29 Shaft 31 Thrust Washer 32 Thrust bearing 33 Seal washer 30 Snap ring 2 35 Snap ring 4 6 5 Hydrostatic control linkage 1 Holder comp 2 Bolt 3 Washer spring 4 Washer plain 5 Nut 6 Rod comp 7 Nut 8 Nut 9 Elbow LH 10 Elbow RH 11 Washer spring 12 Nut 13 Pin 14 Pin 15 Snap ring 16 Snap ring ien are
107. ersonnel Use wheel handling equipment adequate for weight involved when removing and installing wheels 1 3 WARNING SIGNS IN THIS MANUAL The following warning symbols in this manual draw additional attention to items of importance for the safe and correct operation of the tractor SIGN MEANING OF SIGN Serious hazard with a very high level of risk of either serious injury or death DANGER A Hazard or unsafe practice that can lead to severe injury or death WARNING Hazard or unsafe practice that can lead in injury or death CAUTION Instructions for the correct operation of the machine which if followed will ensure that it performs at it s best IMPORTANT 1 5 SAFETY SIGNS RECOGNIZE SAFETY INFORMATION This symbol Safety Alert Symbol means ATTENTION YOUR SAFETY IS INVOLVED The message that follows the symbol contains important information about safety Carefully read the message SIGNAL WORDS A signal word DANGER WARNING OR CAUTION is used DANGER with safety alert symbol DANGER identifies the most serious hazards Safety signs with signal Word DANGER OR A WARNING WA RNING are typically near specific hazards General precautions are listed on CAUTION safety signs CAUTION READ SAFETY INSTRUCTION Carefully read all safety instructions given in this manual for your safety Tempering with any of the safety devices can cause serious injuries or death Keep all safety signs in good condition
108. ery Starting system Starter Capacity Alternator Drive Train JL Hydraulic Mechanical Transmission 3 range gear with constant mesh MFWD 4WD Differential lock Brakes Wet disc brake mechanical Standard Bevel gears with diff Lock o Mee 007 1635 6437 Wheel base mm 1100 43 31 Distance between shafts Min Ground Clearance mm 323 12 727 R1 R1 27X10 50 15 8PR 12 5 20 R4 12PR 27X10 SOLL 15 6PR 41X14 00 20 RL Axle type Traveling speeds Km h Mile h Engine rpm 2 700 MEMO SECTION 3 GEAR TRAIN DIAGRAMS ononpes JEM 189 GTG IHQGO GO0TT COO FG c TT omp IES TLGETH WAND Old Jaaog JENAS 3uo14 uwononpes Jem 3101 OFAOO GT 119119 3010014 e IFS uidio07 s sdgg FIG 1 3 GEAR TRAIN DIAGRAM 1 20 SECTION 4 PRECAUTION FOR TRACTOR OPERATION 1 INSTRUMENTS Left turn Indicator lamp Right turn Indicator lamp Tachometer Fuel Gauge Hazard Warning Temp Gauge Signal S W PTO ON OFF S W Cruise Control S W Throttle Lever Turn Signal S W Key S W Horn S W PTO Control S W Head Lamp S W IP Tilt Pedal Note Oil pressure warning light and charge light on the monitor array will light when the main switch is turned from OFF to ON All lights on the panel go out automatically when the engine is started and its speed is increased to a specific level Do not panic if some lights on the monitor light array do not go out while the engi
109. erything acts in reverse Coil type receiver Main switch unit fuel gauge L Resister ty pe sensor unit B atte ery Gauge pointer Fig 10 4 Wire harness 1 2 Tacho hour meter and sensor Moving iron Sliding contact a Construction An electric tachometer 1s employed along with a Tachosensor The tach hour meter converts engine revolutions to electric signals which is sent to the tachometer The tachometer displays the engine revolutions visually The tachosensor generates 14 pulses per one engine revolution Fig 10 5 Fuel gauge sensor 10 5 b Inspection Fuel meter Connect the fuel gauge to form a circuit with the resisters as shown Fig 10 6 and check to see if the gauge pointer swings to each position F 1 2 and E by changing the resistance value If it does not change the gauge assembly li Fig 10 6 Fuel gauge sensor variable resistor Check each resistance value with a tester at each float position as shown in Fig 10 7 if the measured values are deviated from respective specified values replace the sensor assembly Allowable error 2 Note 1 Figures in parentheses are reference value 2 Inspect each position in order F to E 3 Read values in three minutes 1 4 Thermometer a Construction This 1s the same moving magnet type meters as the fuel gauge As the coolant temperature becomes higher the resistance in the thermo unit sensor become lower which results 1
110. fuse Inoperative flasher unit Inoperative turn signal switch Defective wiring or connections 10 15 Countermeasures Check battery and charge or renew Inspect clean and tighten connection Check and ensure connectors securely engaged Inspect and renew Check circuit before re connecting power Check lighting Circuit wiring and repair or renew Check and renew Check and renew voltage regulator Alternator Check and renew Inspect clean or renew Inspect and renew Check circuit before reconnecting power Inspect secure repair or renew wiring Inspect clean and tighten ground connection Check and renew voltage regulator Alternator Inspect and renew Check circuit before re connecting power Check and renew Check and renew Inspect circuit clean and tighten connection Repair or renew wiring if necessary Problems Individual turn signal light does not illuminate Turn signal pilot light is inoperative Stop lights does not illuminate Inoperative work light Burnt out bulb Causes Corroded or loose bulb contacts Poor ground connection or damage wiring Faulty bulb Defective flasher unit Faulty wiring or connections Inoperative stop light switch See Individual lights do not illuminate Work light switch is not turned on See Individual lights do not illuminate 2 INSTRUMENTATION Problems Inoperative or erratic meters Monitor light does not i
111. gear and ring gear with new ones provide the same shimming thickness as that provided before disassembly e Install the differential gears Only ull Fig 5 35 E VUE y A g Install the differential gear assembly Diff case metal 5 5 7 Kgf m tightening torque 39 8 69 ft Ibs Surface is black due to a special treatment besides case hardening Nut M8 5 20 Note When reassembling the used pinion and ring gear reinstall the same thickness of shims as was installed before disassembly in each shimming position h Backlash adjustment between the drive pinion and the ring pair Fig5 35 i As the drive pinion and the ring gear make a pair be sure not to mate them with other parts from differential tractors 11 Adjust the shimming to backlash of 0 1 0 2 mm 0 004 0 008 1n The standard shimming is 0 4mm 0 016 in on both sides 5 21 Note Strike the circumference of the ring gear both sides with a copper hammer by turning the ring gear manually and check to see that the backlash remains unchanged The backlash should be checked at four points 90 degrees apart to each other 111 inspection of the tooth bearing Apply an even coat of oil dissolved minimum on the drive pinion teeth and turn the drive pinion on the ring gear to check the tooth bearing by observing the bearing traces on the ring gear Correct Contact When drive pinion and ring gear are meshed correctly with e
112. ghtening bolts 15 Detach the MID PTO case assembly from the rear transmission N ML D CJ e N YY A d N amp NS Tw j A NN SN NES R SN ef x n CAN yy AD Uu 7 IPH OA v Q d 2110 A AS NS FIG 2 57 MID PTO case 2 Installation Reassemble the reverse order of disassemble 1 Tighten the MID PTO case on the rear transmission case to the specified torque Tightening torque 2 45 3 43 Kgf m 2 After reassembly make sure that the system functions properly 2 20 8 SEPARATION OF THE REAR TRANSMISSION AND CYLINDER CASE Parts which can be inspected during This operation Control valve Control linkage Piston and lift crank linkage PTO change gears Inspection and service of the rear transmission should be performed following the instructions in the paragraph 5 SEPARATION OF THE REAR TRANSMISSION AND SPACER TRANSMISSION Removal 1 Remove the operator s seat FIG 2 58 operator s seat 2 Remove the position lever 3 Remove the lever guide RH 4 When the tractor is equipped with an optional remote control valve remove the remote control lever and related parts from the bracket 5 Remove the back panel 6 Remove the tank cover 7 Remove the wiring for the rear combination lamps and trailer socket coupler 8 Drain the fuel of fuel tank 9 Remove the fuel tank and tank stay brac
113. gle of rear of the back plate The hydrostatic motor the cam plate This angle is controlled by the drives the input shaft for a three speed range gear operator through a mechanical linkage Moving the transmission which transfers power to the respective directional pedal will move the position wheels See Final Drive Section of the cam plate Moving the cam plate off center changes the distance the pistons travel inside the piston bore of rotating assembly The direction that the cam plate is rotated from center determines the direction of fluid Flow forward or reverse The number of degrees the cam plate is deflected determines how much fluid will be displaced speed The hydrostatic pump provides hydraulic fluid to the hydrostatic motor through the back plate Hydraulic fluid in the power train circulates in a closed loop Fluid leaves the hydrostatic motor and is returned to the hydrostatic pump not the reservoir Fluid that leaves this closed loop circuit such as case drain 1s replenished by fluid from the charge pump 4 12 SECTION 6 TESTS AND ADJUSTMENT 1 HYDROSTATIC PEDAL AND NEUTRAL ADJUSTMENT Reason To ensure that tractor does not move unless forward or reverse pedal is depressed Procedure 1 Operate the hydrostatic control pedals They should return by themselves to the neutral position If pedals do not operate properly check pedals and linkage for damage or wear 2 Start engine and run at low idle
114. h R RG RY RW G WG GBGW Fig 10 14 Harness socket 10 7 Lighting 4 STOP LIGHT SWITCH Fig 10 15 Stop light switch 1 Terminals gt Switching positions Capacity 15 A DCI2V Flasher Stroke to ON 2 0 8mm Color G WG GB Total stroke 5mm code Green White Green Green Black 5 RELAY UNIT B2 R L START RELAY GLOW RELAY Po po pe om 2 ef gt DELE ZERG e Ac mmo NL gt ec c in 1 Terminals a nn sr 2 Switching positions Fig 10 16 Relay unit 6 FUSE Horn switch Fuses are installed in the main fuse box and one for the headlights Three fusible links are Color code B LW installed to prevent the wiring from burning H due to a short circuit 1 Terminals gt Switching positions Fig 10 17 Fuse box 10 8 Each fuse 1s connected as follows Fig 10 18 L4 woning zw Ks MEE 7 comercio mee DER D Engine Stop 9 StopLamp Lamp lam m lI M spare ooo 12 spare vo oo twt 1 The circuit has 8 blade type fuses in its wiring circuit When a fuse has blown replace it with one of the same value Blown out Normal Fig 10 19 Note Using a large capacity fuse or wire burn out the wiring system Use fuse tongs to replace fuses 10 9 7 CONTROLLER Fig 10 20 Capacity DC12V Operating range DC10 16V Operating temperature 15 80 C 1 Function a Engine stop When below condition is performed Engine
115. hat the starting torque of the drive pinion meets the specified level Starting torque 8 11 Kgf m 0 08 0 11KN cm c After the starting torque has been adjusted to the specified level crimp the lock of the nut at one point as illustrated Crimping Drive pinion Fig 5 32 d Tighten the drive pinion metal support by providing 1t with the same shimming thickness that it had when it was disassembled When the drive pinion or the ring gear has been replaced the proper number of shims to be Ring gear tightening 9 0 11 Kgf m installed should be determined based upon the torque 39 8 69 ft Ibs following procedure Note Drive pinion metal 5 5 7 Kgf m tightening torque As shown in Fig5 34 there are two kinds of 39 8 69 ft Ibs differential side gears Although are case hardened the one installed on the side of the diff lock is treated further and colored black Take care not to mix them when assembling Apply multi purpose quality grease to the parts mentioned below e Tooth surfaces of dif pinions and dif side gears e Friction surfaces of dif pinion shafts and dif pinions f Backlash between dif pinion and dif side gear should be within as range of 0 1 to 0 2mm 0 004 0 008 1n and these parts should turn smoothly Shims SM X Bolt M10X25 t 0 2mm Le Dif case NE N Fig 5 33 S Op m S O Uy ES SS oF d Note When assembling without replacing the pinion
116. he inside of the element to blow dust outwards Never strike element to dust b Washing when dust is wet or oily Dissolve element cleanser or neutral detergent of good quality in water Keep the element immersed in the solution about 30 minutes and then wash it by shaking gently Then rinse it in fresh water Water pressure should be less than 2 8 Kgf cm Leave the washed element in a shaded well ventilated place to dry itself Never force dry heat or compressed air 2 An element which has been washed five times should be replaced with a new one 3 When the tractor 1s used in dusty situation Inspect the element everyday and clean if necessary Part names and Nominal Standard value Usable limits Service instructions inspection items dimensions for reassembly and remarks 2 CLUTCH DAMPER Spline No of 20 hub teeth Large 022 35 diameter Small 219 9 diameter 3 TRANSMISSION CHAPTER 5 1 FRONT AND SPACER TRANSMISSIONS TRANSMISSION OIL CAPACITY SHIFTER DISENGAGING LOAD 35 9 25 US gal Front wheel drive 4 6 kgf Measure at the shifter Individual gears 0 1 0 2 mm 0 5 mm back lash Independent Rear Disk thickness 2 6 10 1 mm clutch Driven plate flatness Brake disk thickness 3 0 0 1mm Brake disk flatness 2 REAR TRANSMISSION 1 DRIVE PINION amp RING GEAR 2 3 mm 0 2 mm 0 2 mm 2 5 mm 0 2 mm Starting torque 0 08 0 11 kg m Backlash ler o2m om Drive pinion and Adjustment of relative po
117. he side wall with other hand Never hit the element against a stone ora concrete wall because that might cause its side wall to peel off apply compressed air from inside of the element to blow dust off while turning the element by hand FIG 3 13 Element Note The compressed air to be applied should not have a pressure of more than 7kg cm 99 6psi Maintain sufficient distance between the air gun and the element 2 When accumulated dust is oily Use a solution of TC 101 element detergent or the quality household neutral detergent Leave the element in the solution for approximately 30 minutes and then wash it by dipping it in and out of the solution 3 9 After soaking rise it in fresh water Let it in a shaded and well ventilated place Forced drying by heat or compressed air is prohibited Note Water applied to rinse the element should not have a pressure of more than 2 8kgf cnt 39 8ps1 An element which has been washed 5 times must be replaced with a new one 5 ELEMENT INSTALLATION Install the element in the reverse order of disassembly but follow these instructions 1 Each tightening clamp must be secured and care must be taken not to miss the packing and washers 2 Before installing the element clean the rubber packing on the top of the element Note The clamp retaining the element should be tightened sufficiently so that 1t will not become loose during operation CHAPTER 4 HST system
118. he stopper bolt the poppet and spring can be taken out of the spool Pilot spool and related parts Remove the plugs from both sides and take out the spring and push rod The pilot spool set can be pushed out from the push rod side with a 010 mm 0 394 in rod When pushing put the rod on the sleeve not the spool Note The spool and sleeve cannot be separated from each other 4 Reassembly Inspection of the disassembled parts Place all the disassembled parts side by side on a clean surface Check o rings for damage and replace defective ones Inspect the friction surfaces of the spools poppets and casing for flaws like scratches Correct slight flaw with an oil stone and wash corrected parts in a cleanser Main spool and related parts When the head is disassembled it should be tighten and locked securely using adhesive Before retaining the spool with the snap ring E make sure that the spool slides smoothing within the casing Holding check valve and related parts Put the poppet into hole B as shown in the figure and make sure that the poppet slides smoothly Then put the spring in and tighten the plug on which the O ring must be installed to the specified torque unloading valve 1 and related parts Install the spool into hole C Fig 9 19 in the correct direction Put the spring in and tighten the plug to the specified torque Unloading valve 20 and related parts Install the spool and confirm that the retur
119. hen a bearing is fitted in by the outer race use an installer which 1s an specially designed to push only the outer race and vice versa 2 The installer must be designed to install the bearing on the shaft in a parallel position 3 When installing a bearing which appears the same on both sides install it so that the face which has the identification number faces in a direction for easy visual identification All the bearings which are to be installed 1n the transmission case should be placed so that their identification number faces outward 4 If a shaft or hole where a bearing is to be installed has a stopper the bearing should be pushed in completely until it is seated against the stopper 5 Installed bearings should turn smoothly 2 Oll seals 1 Oil seals installer should be designed so as not to deform the oil seals 2 1 2 During installation be careful not to damage the lips and assure that it is pushed in parallel to the shaft or hole 3 When oil seals are installed there should be no turnover of the lips nor dislocation of the springs 4 When a multi lip seal is installed the grooves between lips should be filed with grease not adhesive 3 O rings 1 O rings should be coated with grease before installing 2 Installed O rings should have no slack or twist 3 Installed O rings should maintain proper air tightness 4 Snap rings 1 Snap ring installers should be designed so as not to
120. hickness 2 5 0 09 mm 2 5 mm wear and damage 3 BRAKE ROD TURN BUCKLE Pedal play at the 30 40 mm top 6 POWER STEERING SYSTEM CHAPTER 1 GEAR PUMP Capacity 6 5 cc rev 15 3 min Theoretical value revolution N 2600 rpm P 150 kgf cm Oil temperature 50 5 C Direction of CCW at 500 3500 rpm revolution 7 HYDRAULIC SYSTEM CHAPTER 9 1 PISTON AND CYLINDER cylinder and bore 75m 0Ommgi 65m 11 4 Part names and Nominal Standard value Usable limits Service instructions inspection items dimensions for reassembly and remarks 2000 kgf cm 3 Cylinder case bush Lee 55 X60 X50 55 2 m Wear imit 02i Right side 60 X65 x50 60 2 mm Wear limit 0 2 mm 4 Flow divider 2 Dynamic lift T303HST T353HST Capacity of PTO 3 00 25 min Pressure 1 kgf cm clutch port Setting pressure of 15 kgf cm over Capacity 0 9 C min PTO clutch port 5 Flow divider assembly DC 12 V 1 2 A Solenoid Rated voltage Rated current Switch over frequency limit 2 times sec Clearance between change over valve and casing EE 0 025 mm Free length of change over valve spring 15 5 mm 150m Clearance between sequential valve spool and casing MI 0 021 mm EE Free length of pressure reducing valve spring 300m 290m Sequence valve spring free length 11 5 Part names and Nominal Standard value Usable limits Service instructions inspection items dimensions for reassembly and remarks 6 SL
121. ight tolerances and finish of internal surfaces it is very important to maintain absolute cleanliness during the assembly of the motor Coat all internal surfaces with clean 10W30 motor oil when assembly Main shaft Bearing Installation Note All needle bearings are pressed in with numbers facing out Needle Bearing 3 be numbers facing out al 4 35 1 If the bearings were removed from the back plate a new one can be pressed In INumbers up using the correct size bearing driver The back plate bearing should be pressed in until 2 30 2 mm 0 09in 0 010in is left above the bore Bearing Spring Numbered r pin 0 09in neh a iran gt tee ee 2 If spring pin that is used to position the valve plate was removed or damaged install a new one Allow the pin to protrude from the back plate approximately 4 4mm 0 17 in Cam plate and shaft Installation Numbered end 3 The housing bearing should be pressed on the numbered side from the outside of the housing inward Until the numbered end is recessed 2 0mm 0 3mm 0 078 0 015in in the housing bore 4 36 4 Apply some grease to the THIS SIDE DOWN side of the cam washer before installing into motor housing so it will stay in place while installing rotating assembly Thrust washer Thrust Bearing Thrust washer External snap ring washer Seal Internal Snap Ring 5 Install the inside snap ring thrust wash
122. illumination lights indicators and signal lights The meter is a device that enables the operator to be aware of the present operating conditions oil pressure gauge water temperature gauge thermometer fuel gauge etc are installed All the controls meters and indicators are arranged around the operator s seat for easy Maneuverability readability and convenience SECTION 2 SPECIFICATIONS MODEL T303HST T353HST PART NAME Specification w Quantity 1 lighting Head lights 50 40 2 Dem Front combination Turn signal lights 2l 2 lights Small lights 5 2 Rear combination Turn signal lights 21 2 lights Stop lights 2 Tail light 2 2 Monitoring Meter assembly Hour meter 1 system Fuel gauge Thermometer Pilot light 15 Lm p 3 Fuses Fuses A In main fuse box 15 4 with spare fuse 10 6 Fusible links 0 85 1 25 10 1 SECTION 3 BATTERY 1 INSPECTION 1 1 INSPECTION OF ELECTROLYTE LEVEL As the battery repeats charging and discharging during operation The water content in the electrolyte gradually evaporates and as a result the level should be inspected at the specific level replenish with distilled water proper Insufficient Excessive Fig 10 1 electrolyte level 1 2 INSPECTION OF ELECTROLYTE SPECIFIC GRAVITY The specific gravity of the electrolyte lowers as the battery discharges so the battery condition can be determined by measuring the specific gravity The specific gravity can be measured generally w
123. in The values apply only if the suction conditions on the steering unit T port are adequate P T PT PRESSURE RELIEF VALVE The pressure relief valve protects the pump 1207 aj and steering unit against excess pressure 1 F 1 and limits the system pressure while steering The pressure relief valve in the steering unit will limit the maximum pressure drop from P to T The pressure relief valve is set at 12 l min 3 17 US gal min flow 8 4 a ol RN NE TR ERR ERE D p 5 OR E MADE REST REA DENM UN abd eo E AHHH D 11 111 Dd 2 4 6 B 10 12 14 15 18 20 10 ll ll ll il a a US gal min 180 877 1n 0 1 Fi a 4 SHOCK VALVES The shock valves protect the steering unit against shocks from external forces on the steering cylinder The shock valves in the steering unit limit the max pressure drop from L to T and from R to T The shock valves are set at 1 l min 0 27 US gal min They are of the direct type and therefore have a very quick reaction The setting tolerance is 20 bar 290 psi CHECK VALVE The check valve protects the driver against kickbacks in the steering wheel It prevents the oil from flowing back into the pump line during steering under high pressure on the cylinder side The check valve is mounted in the P connection of the steering unit P T ON P E PB P T P T pal bar O O E PRESSURE DROP IN NEUTRAL 126 crt A E The pressure drop is measu
124. in in the back plate used to retain the valve plate Allow the pin to protrude from the back plate approximately 4 4mm 0 17 in 14 If removed install two dowel pins 15 Apply a small amount of grease to the steel side of valve plate to hold it in place for installation Place the valve plate in position on the back plate with steel side against back plate Cam plate slope marking IMPORTANT Install motor housing with cam plate slope marking as shown If installed incorrectly the tractor will go backwards when forward pedal in depressed 16 install the motor assembly onto the back plate assembly with the cam plate marking as shown Make sure that the valve plate and cam washer stay in position IMPORTANT Damage to pump may occur if retaining cap screws are not tightened evenly and in a criss crossing pattern to keep pump mounting flange and back plate parallel 17 install eight socket head cap screws to retain motor to back plate Tighten evenly in a criss crossing pattern so that pump mounting flange and back plate remain parallel Tighten to 10 14N m 87 1231b 1m CHAPTER 5 Transmission SECTION 1 GENERAL DESCRIPTION 5 1 1 Wheel driving system 5 1 2 PTO drive system 5 1 3 Power train diagrams 4 5 1 S
125. ing Engine Hare fast or coolant maximum temperature setting Hazard Transmission Fuel level warning oil pressure Engine Stop Neutral a D Turn signal control Transmission oil temperature Power take off engaged Engine oil Power pressure take off Disengaged Air filter Differential lock See P Battery charge operator s manual SECTION 1 TRACTOR TYPES AND PUNCHED IDENTIFICATION MARKS The tractor serial number is shown on the left hand side of the tractor as shown in the picture The engine number is stamped on the top of the engine block Engine type and number on the R H S of Engine body x c Pl T Manufacturer s tractor Sr No stamped on plate on the L H S of Axle bracket I MODEL NAME PLATE The plate indicates the model and type of the tractor D Model name 2 Production I D No The production I D reference number is as shown below 353NH B 01 00001 MODEL AGRICULTURAL TRACTOR T353NH TYPE 4 CYCLE DIESEL Production serial No ENGINE ps rpm 36 PS 2 700 rpm SERIAL NO 38 NH B0100001 Production month MANUFACTURER TONG YANG MOOLSAN CO LTD ADDRESS 4 826 14 YEOKSAM DONG KANGNAM KU Production year SEOUL KOREA O TEL 82 2 3014 2700 O Production Model 3 Engine model Identification and serial number Location 1 Model identification location a The model identification 1s embossed on the right side of the cylinder block near the fuel in
126. ing the unit mounting bolts Note When the pipes related to the hydraulic system are removed their openings should be covered with plastic caps or the like to keep out dust or other foreign matter 2 installation Reassemble in reverse order of removal 1 Install the axle bracket on the engine 2 Retighten the right hand pivot metal support mounting bolts 3 Connect the piping of the power steering system 4 Install the battery bracket and battery 5 Install the radiator and oil cooler on the front axle bracket 6 Connect the upper lower and drain radiator hoses 7 Install the air cleaner assembly and the inlet pipe of the air cleaner Fig 2 11 Oil cooler and HST unit 8 Connect the wiring of the head lights and other harness 9 Connect the ground strap and the battery cables 10 Install the engine hood 11 Install the side covers 12 Fill the radiator with coolant 3 SEPARATION OF THE ENGINE AND THE FRONT TRANSMISSION Parts which can be inspected during this operation Fly wheel HST unit 1 Removal 1 Drain the transmission of the oil In the case of the 4WD version remove the front wheel drive shaft 2 7 FIG 2 12 FIG 2 14 4 Disconnect the panel instrument set removing bolts 4 nos FIG 2 13 2 Support the engine on the bottom with a jack or stands 3 Hold the transmission with a garage jack or a crane so that the transmission side can be moved when needed
127. ith a suction type hydrometer which must be read properly as shown in Fig 10 2 Rubber ball Glass tube Hydrometer Correct hydrometer reading Suction tube Fig 10 2 electrolyte gravity 10 2 Note When the distilled water is added charge the battery to mix it well into the electrolyte before measuring the specific gravity a Temperature correction of the hydrometer reading The specific gravity of the battery electrolyte diluted sulfuric acid varies with the temperature of the electrolyte at a rate 0 0007 specific gravity point for each 1 C change in temperature Therefore when the specific gravity of the electrolyte in the battery is measured with a suction type hydrometer a temperature correction should be made using the following formula to permit the direct comparison of the measured valve with the standard specific gravity at 20 C S20 St 0 0007 t 20 S20 Specific gravity at standard temperature of 20 C t Temperature of the electrolyte at the time of measurement St Specific gravity of the electrolyte measured at t C 1 3 BATTERY CHARGING If the specified gravity of the battery electrolyte in lower than 1 220 at 20 C the battery should be recharged because leaving an undercharged battery without recharging it will lead to permanent battery damage The battery is subject to self discharge at a rate as shown in the table below Therefore it should be recharged from time to time when storing the
128. jection pump mount b The model identifications and dis placements of the engines in current pro duction are as listed below A Model identification location c A scheme of coding used for identify ing the engines in current production 15 as follows Example Coded designation S4L 2 61 A Stroke code No code 78 5 mm 3 09 in 2 92 mm 3 62 in i Ser 1 es C ode Number of cylinders code 4 stands for four cylinders Identification of Sagamihara Machinery Works 2 Serial Number Location The serial number is punched on the cylinder block near the fuel injection pump mount Serial number Serial number location SECTION 2 SPECIFICATIONS MODEL T303HST T353HST MITSUBISH SAL SAL2 Engine Maker Model Water cooled 4 cycle 4 cylinder diesel T303HST 21 9 2700rpm T353HST 26 5 2700rpm Type Out put Kw rpm Number of Cylinder 1500cn 1 758 cni T303HST 78 mm X 78 5mm T353HST 78 mm X 92mm T303SHT 21 3 0 5 OBS T353HST 24 3 0 5 1 3 4 2 Direct Displacement cm Bore and Stroke Firing order Injection pump Lubrication type Forced circulation Cooling system Water cooled Forced circulation Coolant capacity 7 1 85 US gal Air cleaner Muffler Fuel Dry Single Element Horizontal Diesel fuel 33L 8 7 US gal 12V80AH Starter motor with pre heater 2 0KW 12V 50A Fuel Tank capacity Electrical Batt
129. ket 10 Detach the delivery pipe from the cylinder case 12 Remove the slow return check valve along with the shaft 13 Remove the 3 point lift link and related parts from the lift arm 14 Remove the Cylinder case tightening bolts 15 Detach the cylinder case assembly from the rear transmission aa a y OF So la SAS or X E d A UY 2 M A F f pE A A ID q i Cy c d i 4 AD on 1 of ee N fa g 2 ams i y Mi S y j P SIP we C 9 t d FI Ca 2 59 cylinder case 2 Installation Reassemble the reverse order of disassemble 1 Tighten the cylinder case on the rear Tightening torque transmission case to the specified torque 5 4 6 87 Kgf m 39 8 50 61b fts 2 After reassembly make sure that the system 2 21 functions properly Chapter 3 ENGINE ACCESSORIES SECTION 1 RADIATOR 3 1 1 General description 3 1 2 Radiator mmm 3 2 3 Specifications 3 3 4 Removal of the radiator 3 3 5 Inspecti
130. l plugs Tighten to 135 149N m 100 110 Ib in 5 Install forward and reverse relief valves in ports marked at disassembly Tighten to 135 149N m 100 110lb ft 6 Install charge pressure relief valve Tighten to 37 41N m 27 301b ft 7 Install two dowel pins Bearing Numbered side up 8 If the bearings were removed from the back plate press new ones into position using a suitable bearing driver The numbers on the bearing should face the outside of the back plate press the bearing in until 2 30 2 mm 0 09in 0 010in of the race remains above the surface of the back plate 9 If removed install the spring pin that is used to position the valve plate Allow the pin to protrude from the back plate approximately 4 4mm 0 1 1n 4 HYDRAULIC PUMP DISASSEMBLY 4 Li a s A P F E f IMPORTANT The pump body is aluminum and can be easily damaged by steel tools Be careful to not damage machined surfaces Do not use screw driver or other sharp objects to pry pump body from back plate 1 If not already done remove four socket head cap screws securing the pump to the back plate Tap pump body with a plastic mallet to remove pump 4 26 2 Remove cap screw and nut Remove speed The following parts will be needed to disassemble control lever and neutral switch as an assembly the piston block 2ea 3 8 IDX1 1 4 in OD flat washers 1 E lea 3 8X 5in N C cap screw
131. le all controls to relieve any pressure that may be in the hydraulic system Hydraulic oil filter NOTE 4WD shaft removed for clarity 5 Underneath the tractor at the front of the tunnel locate the hydrostatic transmission Remove the plug in the charge pressure test port 6 Assembled test equipment as shown and install to test port 7 Start engine and run at high idle 2500 2700rpm 8 Check pressure reading gauge Specifications Charge Pressure 1723 206SKPa 250 300psi Results Charge pressure should reach 1723 2068KPa 250 300 psi cannot obtained the mesh inlet filter may be restricted the suction line may be restricted or leaking air or front hydraulic pump may be defective 4 15 4 HYDRAULIC SYSTEM BLEED PROCEDURE Reason To remove air trapped in the hydraulic system which will prevent proper operation Procedure IMPORTANT If contamination is found in hydraulic system filter or inside reservoir flush entire hydraulic system NOTE Fill the hydraulic oil filter with new oil before installing 1 Install a new hydraulic oil filter 2 Fill the transaxle with specified and recommended Transmission oil to the proper level in sight glass 3 Disconnect in plug to fuel shutoff solenoid 4 Turn the key to START and hold for 10 seconds Turn the key to OFF 5 Reconnect wires to fuel shutoff solenoid 6 Raise tractor front end and support on suitable stands 7 Start the engine and run at low idle
132. lectrical shorts and entanglement in moving parts WORK IN VENTILATED AREA Do not start the Tractor in an enclosed building unless the doors amp windows are open for proper ventilation as tractor fumes can cause sickness or death If it is necessary to run an engine in an enclosed area remove the exhaust fumes by connecting exhaust pipe extension 1 10 SAFETY DECALS The following safety decals ARE INSTALLED ON THE MACHINE If a decal become damaged illegible or is on the machine replace it The decal part number is listed in the parts lists Before starting and operating know the Q Do not permit anyone but the operator to l l l ride on the tractor operating and safety instructions in the 20 teda There is no safe place for rider operators Manual and on the tractor Lock brakes together use warning lights O Clear the area of bystanders and SMV emblem while driving on roads Locate and know operation of controls Lower equipment place gear shift levers Q Start engine only from Operator s seat in neutral stop engine remove the key with depressed clutch pedal and apply parking brake before leaving gt h transmission in the neutral PTO disengaged the tractor seat Air pressures are specified by the and hydraulic control in lower position manufacturer Q Slow down on turns rough ground and slopes to avoid upset FAILURE TO FOLLOW ANY OF THE INSTRUCTIONS ABOVE CAN CAUSE SERIOUS INJURY
133. lluminate PTO does not operate Loose or broken wiring Causes Defective meters Defective sensors Defective Voltage regulator Loose or broken wiring Faulty main switch Burnt out bulb Burnt out fuse Defective switch Loose or broken wiring Burnt out fuse Loose or broken wires or connections Defective PTO switch Defective PTO solenoid 10 16 Countermeasures Check and renew Inspect clean and renew Inspect clean and tighten connections or renew wiring Check and renew Check and renew Inspect clean and tighten connections or renew wiring Check and renew See Individual lights do not illuminate Ensure work light illuminates See Individual lights do not illuminate Countermeasures Inspect Circuit tighten connections or renew wiring Inspect and renew Check and renew Check and renew voltage regulator Alternator Inspect circuit tighten connections or renew wiring Check and renew Check and renew Check and renew Check and renew Check and renew Inspect and renew Check circuit Inspect circuit tighten connections or renew wiring Check and renew Check and renew Problems Causes Inoperative Burnt out fuse horn Loose or broken wires of connections Defective horn switch Defective horn Cruise does Burnt out fuse not operate Loose or broken wire Loose the magnetic assembly 3 GLOW SYSTEM Defective or corroded glow plug does not glow contacts
134. ly 26 Remove the forward and reverse arm Forward and reverse pedal FIG 2 48 MID PTO stopper FIG 2 45 Forward and reverse pedal 29 Remove the front wheel drive shaft 30 Remove the brake rods 31 Remove the 4WD shift metal Sed nar r1 L EIN 5 z TTE p F Y A i E E ES FIG 2 46 Oil damper 2 17 FIG 2 49 4WD shift metal 32 Remove all the spacer rear transmission case tightening bolts and nuts except the bottom bolt FIG 2 50 space transmission bolt 33 Install the rear wheels LH and RH and the remained bolts Then turn the rear wheels by hand to move the rear transmission case away from the spacer transmission case 2 Installation Reassemble in reverse order of disassembly Note The 4WD drive shaft should be installed on the rear transmission ahead of time 1 Join the rear and spacer transmission cases Note During the operation be careful not to damage needle bearings the cut away part in the gear should be turned downward without fail so as to clear the gear to be positioned underneath 2 Install the main change shifter link and each change metal 3 install the brake rods and front drive shaft 4 Install the hydraulic piping 5 Install the 4WD shift metal 6 Install the MID PTO stopper assembly 7 Install the forward and reverse arm 8
135. lyte 4 Refer to voltage table Voltage below table value Voltage equal to or above table value return to service Voltage table Estimated electrolyte temperature Minimum required voltage under 15 sec load Use 2 these values for 6 V batteries 21 C and above 16 C 10 C 4 C 1 C 7 C 12 C 18 C 10 4 SECTION 4 METERS AND SWITCHES 1 METERS The generated pulses are converted into voltage 1 1 Removal output through a converter Then the voltage is divided into three different phase coils through a a Disconnect the cable from the negative post IC circuit The tachometer pointer is swung by b Remove the philips screw which hold the the compound magnetic field generated by the meter panel and lift up the panel assembly a three point little b Inspection Tachometer The allowable error of a tachometer reading is specified as shown on the table below If the reading deviates from the specified value replace the meter assembly Engine speed rpm Allowable error rpm 1 3 Fuel gauge and Fuel gauge sensor a Construction c Then the meter panel can be detached by l When the fuel tank is full the float is at the top removing the wire harness couplings and has moved the variable resister to a position of least resistance This feeds maximum current into the meter circuit and the pointer swings fully to the F position Consequently when the fuel level in the tank is low ev
136. mage 2 When installing the brake unit on the wheel pinion friction plates and separator plates should be arranged in correct order and never forget to retain the unit with the snap ring 3 Cam brake tightening nuts should be tightened to the specified torque with a torque wrench Fig 7 10 Fig 7 10 4 Replace the oil seal Install the bearing snap ring and collar into the axle 2 530 09 housing and then press in the oil seal by applying 0 098 force only to the circumference as shown in the 2 2 0 087 figure Fig 7 11 7 5 Apply force only to the shaded parts Cam brake Take care not to deform these portions 1 Cam brake 2 O ring Fig 7 11 5 press the wheel shaft 6 Install the wheel gear and bearing on the wheel shaft and retain them 7 Apply adhesive THREE BOND 1215 to the contact surfaces of the brake metal and housing and then retain the plates by tightening the nuts to the specified torque 0 6 0 8 Kgf m 4 3 5 8ft Ibs Tightening torque Brake case 1 When installing the brake disc Disc plate and separator should be arranged in correct order 2 Apply an grease to the O ring and take care not to be damaged when installing to the brake cam 3 pay particular attention to the installation of the snap ring 4 The assembled wheel pinion should rotate smoothly Fig 7 12 7 6 SECTION 4 TROUBLESHOOTING Problem 1 Rear axle Noises 2 Brake system 1 Insufficient br
137. mission DFront transmission Engine tightening bolts and nuts M 12 7T 9 0 11 0 2 Front transmission Spacer transmission tightening bolts and nuts M 12 7T 9 0 11 0 3 Space transmission Rear transmission tightening bolts and nuts M 12 7T 9 0 11 0 Input metal support tightening bolts and nuts Drive pinion metal support tightening bolts M 12 7T 9 0 11 0 Drive pinion tightening nut M 10 7T 5 5 7 0 O Dif case metal support tightening bolts Dif case ring gear tightening nuts M 12 5 5 7 0 M 12 7T 9 0 11 0 11 10 SECTION 3 CONVERSION TABLES Millimeters to inches Inches to millimeters Ub ml in mn IN 2 0079 a a aan 20472 77 3 0815 20866 78 3 0709 23060 79 3 102 21654 80 3 1496 ESA 3 22047 81 3 1800 TEE 2244 82 3 2083 8 03150 ss 1292 22035 83 3 2677 EMETERIO 84 Cu Pao s fofo Te 2 3622 24409 87 3 4252 S Ea T 16 06099 4t 161me 66 25984 9 3 5827 17 0663 4 1 6535 _67_ 2 6378 92 3 620 MO E a Taer E 19 0740 4 17308 69 27165 94 3 7008 20 ozs74 45 1777 70 2 7559 95 ETSI IA oe te ee 22 ost 47 1 9504 72 28846 97 3 8160 23 0 9055 48 1 8898 73 2 8740 98 3 8583 25 0 9843 so 1 9685
138. moved by about 3 mm 0 12 in across R and LR 7 STOP LIGHT SWITCH Continuity across each terminal Switched on when actuator is pushed in by about 3 mm 0 12 in assembly 8 PARKING BRAKE SWITCH Continuity across each terminal Switched on when lever is pulled up by about 3 mm 0 12 1n Replace a defective switch assembly Replace a defective switch assembly Replace a defective switch assembly Replace a defective switch assembly Replace a defective switch assembly 9 HAZARD WARNING SWITCH Replace a defective So 2 Continuity across switch assembly each terminal ON OFF 11 9 SECTION 2 TIGHTENING AND STARTING TORQUE SPECIFIED FOR MAJOR PARTS 1 T303HST T353HST TIGHTENING PARTS BOLT AND NUT TIGHTENING TORQUE HARDNESS kgf m I Front axle housing 4WD type Axle bracket Engine tightening bolts M 16 7T 16 0 18 0 2 Front pivot metal support tightening bolts M 12 7T 9 0 11 0 S Rear pivot metal support tightening bolts M 14 7T 13 0 15 0 4 Front axle final case tightening bolts M 12 7T 9 0 11 0 Bearing cover tightening bolts M 18 7T 2 0 2 4 6 Wheel shaft cover tightening bolts M 110 7T 5 5 7 0 Front wheel tightening bolts M 16 7T 16 0 18 0 8 Bevel gear case tightening bolts MS 1 3 1 8 9 Dif metal support tightening bolts M8 1 3 1 8 10Ring gear dif metal support tightening bolts M8 1 3 1 8 Bevel pinion lock nut 2 Trans
139. n more current to the meter circuit and swinging the meter pointer to the high temperature side on the scale Of course as the coolant temperature become lower everything acts in reverse b Inspection Normally the thermometer resisters higher values as the coolant temperature rises after the engine is running If it does not check the wiring first If the wiring is normal Replace assembly 2 STARTER SWITCH 1 Removal a Remove the dash cover Upper b Remove the ring nut holding the starter switch using a conventional screw driver c Pull out the key switch as shown in Fig 10 8 2 Inspection a The main switch circuit switching positions and terminals are as shown in the figures Check the continuity across respective terminals referring to the switch circuit diagram Replace a defective switch as an assembly O OFF LON 2 START 3 GLOW 19 3017 50 BRAC GLOW 3 START 2 Fig 10 10 3 COMBINATION SWITCH 1 Removal 1 Remove the meter panel 2 Remove the light switch knob and turn signal switch lever Fig 10 12 3 Release the ring nut with a conventional screw drive and remove the combination switch 2 Inspection Each switch circuit 1s as shown so check each switch for a continuity across respective terminals with a tester Replace a defective switch as an assembly Horn WS Ss D H Turn Signal Switch Head Lamp Switch Fig 10 13 combination switc
140. n of charge pump and hydrostatic pump position 4 Control pedal in full Machine should move Check pedals and forward reverse forward position forward linkage for damage Check forward drive pressure relief valve 5 Control pedal in full Machine should move Check pedals and forward reverse reverse position backward linkage for damage Check reverse drive pressure relief valve 4 11 SECTION 5 THEORY OF OPERATION HYDROSTATIC SYSTEM Function Charge pump The charge pump is a gear type positive The hydrostatic system provides a means to transfer displacement pump mounted to the right front Power from the engine to the final final drive to the side of the engine wheels it also provides infinitely variable speed This pump provides pressurized fluid to the SCU control forward or reverse by foot pedal operation Steering Control Unit Return oil from the SCU is routed through the filter mounted to the front Principles of Operation of the back plate and then into the hydrostatic pump to provide replacement fluid to the The hydrostatic system is a closed loop fluid power hydrostatic pump system that consist of a charge pump on the left front side of the engine and an EATON piston pump motor assembly which is driven by a Hydrostatic Motor Flexible coupler Attached to the flywheel The hydrostatic motor is an EATON high torque axial piston motor The motor is located on the Fluid flow is controlled by by changing the an
141. n the right hand side of the transmission case and install a compression gauge to measure the pressure Keep the engine speed at 2600 rpm and shift the position control lever at the highest position 9 14 6 FILTER O ring G45 Suction filter Fig 9 30 Filter 1 GENERAL DESCRIPTION The tractor 1s equipped with two oil filters suction filter 1 and line filter 4 for better filtration 2 SPECIFICATIONS Suction filter Applicable oil DONAX TD or RPM THF 500 Rated flow rate min 35 Filtration density mesh 150 mesh Filtration area 450 cm Working oil temperature C 30 130 C 3 Line filter Applicable oil DONAX TD or RPM THF 500 Filtration density mesh 80 mesh 9 15 Line filter 4 REPLACEMENT Check the O rings for damage or deformation and replace defective ones When installing the filters be sure to install the O rings properly with grease applied SECTION 4 REMOTE HYDRAULIC CONTROL Maximum flow C min Maximum pressure bar Viscosity range Temperature range of the fluid Environmental temperature Max level of contamination of the fluid Internal leakage 1 Remote hydraulic control valve OPTIONAL a Ce Fig 9 32 Remote hydraulic pump 9 16 26 25 12 to 400 mm s 20 BC to 80 BC 40 BC to 60 BC 19116 ISO4406 3cm min at 100 bar 40 BC and 46 mm s 1 Remote Valve 2 Stay 3 Bolt 4 Bolt 5 Hose return 6 Adapter PF 90 7 Band 8 Adap
142. ncy litre cu in mm 21 5 Gear Pump at 2600rpm s E T NOTE Recommendable Transmission oil Manufacturer Product CALTEX Textran TDH Premium Texaco TDH oil Chevron Chevron 1000THF ESSO Torque Fluid 56 MOBIL Mobil fluid 423 SHELL Donax TD CASTROL CASTROL AGRI MULTITRANS TOTAL Transmission MP 9 2 SECTION 3 MAJOR COMPONENT OF THE HYDRAULIC SYSTEM 1 HYDRAULIC SYSTEM 2 O ring PG6 3 Ring back up 4 Piston 7 Rod 8 Pin spring 9 Iron wire 10 Cylinder head 11 O ring 12 Bolt 13 Washer spring 14 Lift crank 15 Plug 16 Bolt 17 Flow con valve 18 Dust seal 19 O ring P 20 0 ring P 2 Knob 22 screw 23 Washer spring 24 Nut 25 Shaft Slow return 26 Plug M22 27 O ring P 30 0 ring P 31 0 ring P 32 Main control valve 35 Oil pipe 9 3 2 FLOW DIVIDER GENERAL DESCRIPTION This valve is installed to bypass working fluid of a specified pressure from the main circuit into the PTO circuit through a fixed orifice It includes a changeover valve for engaging and disengage the PTO clutch by means of a solenoid and a sequential valve for PTO circuit s over the main circuit 1 Flow divider 2 PTO pressure control valve z xv vE 3 Transmission case Fig 9 3 1 Solenoid This solenoid is switched on or off by operating the PTO switch With this lever operation the solenoid shifts the changeover valve to the left or the right to bypass or block the flow to port B 2 PTO changeover valve
143. ne is at idle speed just after its starting They will go out automatically when the engine speed reaches as a specific level 1 21 MEMO 2 CONTROLS Left Turn Brake Right Turn Brake m 1 Instrument Panel TT C Hand Throttle Lever E Forward Speed Control Pedal Reverse Parking Brake Lever Master Brake Pedal A Tilt Lever Hydraulic Remote Control Valve Lever j Lowering Speed Control Knob Differential Lock Pedal Hank Brake Optional a Front Wheel Lever 4WD Sub Gear Lever Range Shift Lever LMid PTO Lever 1 Hydraulic Position A Control Lever A Y M i my Rear PTO Lever A 4 O ZO Low beam lamp pro monitor Lamp fuel AS wy x9 Ero Cruise Control Glow signal Oil pressure Parking brake Check lamp Lamp Charge lamp Lamp lamp lamp 1 23 i 4WD drive lamp High beam lamp 3 FILLING DIAGRAM amp CAPACITY TABLE Front Axle Oil Filler Gauge Transmission Filler _ Engine Oil Gauge Transmission Drain Engine Oil Filler T M Oil Gauge Speed Control Pedal Rod Engine Oil Drain Oil Filler Hole Greasing Points A Drains w Windows Front Axle Drain TABLE 1 7 Filling point Fillings E MODEL 1 RADIATOR 50 50 Ethylene Glycol Water L L C ASTM D4985 D6210 2 ENGINE API CF 4 grades Above 25 C 77 F
144. ness 3 0 1mm 2 5 mm 0 118 1n 0 098 in Surface flatness 0 2mm 0 008 1n Fig 5 12 f Also inspect other parts for wear and deformation and replace them if necessary Note Seal ring and the two seal rings should be replaced as a pair 3 3 REASSEMBLY HL eal m T dt Bearing Ball 6206 Snap ring Coupling Fig 5 13 Reassemble the parts in reverse order of disassembly following these instructions Note Each parts should be washed clean before c When installing the return spring use a reassembly special tool the snap ring should be securely Apply multi purpose quality grease to seated in the groove needle bearings in advance Each bolt and nut should be tightened to d When pushing the RBB s 6205 and 6005 the respective specified torque table into the gear be careful only to push their Every time a gear is installed its smooth outer races rotation should be checked Every snap ring should be seated securely in its groove a When installing seal rings apply fresh oil ahead of time and install them carefully so as not to damage them b Install the return plate with the press processed side turn towards the brake disc 4 Bearing ball 6205 5 Gear helical 35T 6 Bearing ball 6005 e Install washer in correct direction E ELGSSADEDSERDAOIOE f After reassembly check to see that gear 35T turns smoothly by locking the PTO clutch Fig 5 14 D Return plate Brake
145. new Problems Causes Intermittent Alternator drive belt is slipping or low Loose connection or broken cable in alternator charge system output Defective alternator Warning light Faulty external charging circuit dims connections Faulty rotor slip rings or brushes Defective monitor and warning unit Faulty rectifier or rectifying diodes Warning light Defective voltage regulator is normal but battery is discharged Faulty rectifier or rectifying diodes Faulty starter Warning light Loose or worn alternator drive belt is lit durin ee Defective diodes operation Faulty rotor slip rings or brushes Defective starter Defective rectifier or rectifying diodes Warning light Faulty external charging circuit flashes intermittentl y Alternator s internal connections 10 19 Countermeasures Check and adjust belt tension or renew Inspect system tighten connections and repair or renew faulty wiring Check and repair or renew Inspect system clean and tighten connections Inspect and repair or renew Check and renew Check and renew Check and renew Check and renew Check and renew Check and adjust tension or renew Check and renew Inspect repair or renew Check and renew Check and renew Inspect circuit clean and tighten connections Repair or renew faulty wiring Inspect and test circuitry Repair or renew CHAPTER 11 Service standards and other information SECTION 1 SERVICE STANDARDS
146. ns smoothly by the spring force after it 1s compressed by pushing the stopper bolt end and check that it slides smoothly Pilot spool and related parts Be careful not to damage the O ring during pilot spool installation After assembly make sure that the spool slides smoothly by pushing the push rod 9 26 SECTION 6 TROUBLESHOOTING Problems 1 Lift does not rise Causes 1 Insufficient engine speed 2 Insufficient transmission oil 3 Air taken in through suction 4 Clogged suction filter 5 Broken or poor hydraulic pump 6 Poor link mechanism 7 Excessive load on lift 8 Broken cylinder 9 Too low viscosity of transmission oil 10 Maladjusted relief valve 11 Excessive internal leaks 12 Broken flow divider Stuck sequential valve spool 13 Broken control valve Countermeasures Raise engine speed slightly Maintain oil level by replenishing with the same kind of oil Tighten securely or replace broken parts Clean Inspection pump and repair or replace if necessary Pay particular attention to shaft seal because a broken seal sometimes intakes air Inspect adjust repair or replace if necessary Refer to section 3 Decrease load Replace As it will cause oil leaks or internal wear replace with gear oil of SABSO Readjust Cracking refer to the specifications Inspect cylinder and valves Replace damaged seals and repair Check each part systematically Disassemble an
147. nsmission and rear axle housing 2 18 7 Separation of the rear transmission and MID PTO 2 20 8 Separation of the rear transmission and Cylinder case 2 21 Chapter 2 Disassembly and reassembly of major components SECTION 1 GENERAL PRECAUTIONS FOR SEPARATION AND REINSTALLATION 1 BEFORE OPERATION 1 Always be safety conscious in selecting clothes to wear and suitable tools to use 2 Before disassembly be sure that you familiarize yourself with the assembled condition for subsequence in reassembly 3 Keep parts and tools in proper order during operations 4 When servicing electrically charged parts be sure to disconnect the negative battery terminal 5 To prevent oil or water leaks use the liquid gasket as required 6 When lifting up only the front or rear part of the tractor be sure to wedge the grounded wheels 8 When the tractor 1s jacked up be sure to support the entire tractor with something like a stand Lifting it up with a jack only is dangerously unstable procedure 9 When replacing parts use authorized genuine TYM parts only TYM assumes no responsibility for accidents operating problems or damage caused by the use of imitation parts Also the use of unauthorized parts will result in relatively poor machine performance 2 PRECAUTIONS TO BE FOLLOWED WHEN INSTALLING STANDARDIZED PARTS 1 Roller or Ball bearings 1 W
148. nspect the outside of the pistons Replace if scored or worn 5 HYDROSTATIC PUMP INSPECTION 5 Inspect the shoes Replace if loosed on the ball end of the piston or if shoe face area is worn or damaged 6 Inspect the spider Replace if worn in the area where it contacts the pivot 7 Inspect the pivot Replace if worn or damaged 8 Examine the machined surfaces of the back plate Replace if scored or damaged 1 Inspect the bronze side of the valve plate for wear Replace the valve plate if 224 y l O Thrust washer any wear scoring or scratched exist Q Thrust Bearing Thrust washer External snap ring washer Seal 4 29 Internal Snap Ring 9 Inspect the shaft for damage on the bearing surfaces or in the splined areas 10 Inspect thrust bearing and washers for wear 11 Inspect the servo piston for scratched and wear 12 Replace seal Replace worn or damaged parts as required 6 HYDROSTATIC PUMP ASSEMBLY 1 Clean all parts in a suitable solvent and dry with lint free rag IMPORTANT Due to extremely tight tolerances and finish of internal surfaces it is very important to maintain absolute cleanliness during pump assembly Coat all internal surfaces with clean 10W30 motor oil when assembling Housing and shaft assembly Recessed in Bore 2 0mm 0 3mm 0 078 in 0 15in Numbers out 1 If the needle bearing was removed from the housing the new one can be pressed from the outside inward un
149. ntact surfaces between the final case A and front axle 2 The installed wheel shaft should turn smoothly 3 When installing unitized seals on the wheel shaft cover and the rotating part between the final cases A and B apply force only to the outer circumference of the seal as shown in Fig 6 26 to avoid deformation Take care not to deform these portions Fig 6 26 4 The oil seal should not be coated with grease between the surface of the oil seal in advance Then install them carefully assuring that their lips are not turned over 5 The reassembled final case B should turn smoothly until it makes contact the stopper 6 When the wheel tire 1s reinstalled turn it by hand to make sure that all the mechanism turns smoothly without making any noise 7 After adjustment of the toe in perform road tests There should be no abnormalities such as vibration abnormal noises defected steering wheel operation etc 6 13 Wheel shaft cover 1 Every snap ring 5 should be seated securely in its groove 2 Be sure the numbers of Bevel gear is correct teeth numbers are 41 Final drive case A 1 Each parts should be washed clean before reassembly 2 Apply multi purpose quality grease to bearings in advance 3 Every time a gear and bearings are installed its smooth rotation should be checked 4 Adjust Back lash between bevel gear 9 2 and bevel gear 16 3 with collar 4 Back lash mm in 0 1 0 2
150. o loosen it from the valve plate Keep the assembly level or tip output end down to keep the rotating assembly from sliding off of shaft Pull the motor housing shaft and rotating assembly away from back plate 2 Remove the four socket head cap screws securing the pump to the back late Remove pump 3 Remove cap screw and nut Remove holder and arm as an assembly 4 24 Forward Relief valve c Gasket UM Hydrostatic f pump 4 Remove gasket from pump assembly Back plate Disassembly C3 Motor valve plate Springpin 4 MU o I vt S ne lg gi E he O A e o a Dowel pin AM NOTE Pump and motor valve plates are very similar in appearance but are not interchangeable Note shape of valve plates when removing Valve plates are not fastened to back plate but may adhere slightly because of oil between the machined surfaces 5 Remove valve plates from the back plate 6 Remove two dowel pins NOTE Unless spring pin used to locate valve plate is damaged or loose do not remove If replacement is necessary Use care not to scratch the machined surfaces of the back plate 7 Mark the forward and reverse relief valves and their ports to ensure they go into the correct holes during assembly Remove the relief valves from the back plate Clean the relief valves in a suitable solvent and check for damaged springs or seats O ri Relief Valve ring Relief Valve spring A aan Valv
151. ole unit into vertical position The pin in the spool set must now point towards port P in the housing either at 6 o clock or 12 o clock STEP 5 Spring retaining ring 10 Center the springs in the spool sleeve set and guide the ring down over the sleeve 8 9 STEP 8 Ball 3 Place the emergency steering ball in port P Ball stop 4 Place the ball stop in port P Ball 37 Place the check valve ball if required in port P STEP 9 O ring 15 Fit the O ring in the housing Distributor plate 16 Place the distributor plate on the housing Turn it so that the holes line up STEP 10 Cardan shaft 13 Fit the cardan shaft into the inner spool and allow it to engage with the pin If so required use fork SJ 151G9000 1to retain the cardan shaft STEP 11 17 Gear wheel When fitting the gearwheel it must be oriented correctly so that it engages with the cardan shaft The cross pin 11 in the spool set must line up with the bottom of the teeth in the star see sketch STEP 12 O rings 18 Place the O rings in the grooves on each side of the gearwheel rim Gear ring 17 Place the gearwheel rim over the distributor plate so that all holes are in line with each other STEP 13 Spacer 14 Place the spacer over the cardan shaft End cover 19 Place the cover so that the hole marked P lines up with port P in the housing 6 o clock or 12 o clock STEP 14 S
152. on of each part 3 3 6 Radiator reassembly 3 5 7 Daily inspection 3 5 8 Trouble shooting 3 6 SECTION 2 AIR CLEANER SYSTEM 3 7 1 General description 3 7 2 Double elementary air cleaner 3 8 3 Inspection of each part 3 9 4 Cleaning of the air cleaner 3 9 5 Element installation 3 10 Chapter 3 Engine accessories SECTION 1 RADIATOR 1 General description The pressure cooling system includes mainly the radiator water pump multi blade fan and the thermostat During the warm up period the thermostat remains closed and coolant is directed through by pass to the suction side of the water pump Coolant then circulates through the cylinder block and water pump only to provide a uniform and fast warm up period Once the engine has reached operating temperature the thermostat opens and coolant is pumped from the bottom of the radiator via the lower hose into the cylinder block Here it circulates through the block and around th
153. onnect the clutch rod and brake rods under the floor 6 Disconnect the steering cylinder at the hydraulic pump FIG 2 25 Diff lock pedal 2 12 10 Remove the parking brake 11 Remove the main shift and transmission range shift levers The levers can be separated in the middle 12 Remove the control rods of the PTO shift and 4WD shift levers from the transmission 13 Remove the position control levers a ye FIG 2 28 Rubber mounting 17 Lift up the floor slightly with a hoist 18 Disconnect the linear shift control cable fuel hoses and gauge coupler between the fuel tank and floor 19 Disconnect the pipe relevant to the HST tank AS I my a FIG 2 27 position control lever 14 When the tractor is equipped with an optional remote control valve remove the remote control valve link 15 Drain the fuel system of fuel 16 Remove four rubber mounts FIG 2 30 20 Lift the floor gradually taking care not to allow the shaft of the slow return check valve and its hole in the floor to interfere with each other E I D FIG 2 31 Slow return check valve Note Lift up the floor gradually making sure that all relevant wiring Piping and links are disconnected r P ge i am Pb el 7 ec y g E earn PP shod es S CUN VE gt et gt LEJE PEL OPT LEIP A FIG 2 32 Brake pedal Rod comp B Division of the chassis 1 Drain the
154. ont axle refer to the paragraph covering disassembly of the center pivot 2 Remove both wheels 3 Remove the drain plug from the final case and drain oil from the final case 4 remove both final case assembly A and B from the front axle Fig 6 11 If E ere SN NS Lam VESTE SN Js Oil seal Fig 6 11 5 Remove the oil seal assuring parallelism of the ring gear and bearing Note The number of shims 1 installed and the the shimming thickness should be noted for later reference 6 Remove the bearings from the Axle housing And the ring gear and then the ring gear can be separated from the Axle housing 7 Remove the straight pin 4 which retains the axle housing Note Discard the removed straight pin and oil seal and install a new pin and Oil seal when reassembled because this pin and oil seal is apt to be damaged when removed 8 Remove the snap ring and the bevel pinion can then be removed together with the TRB s Fig 6 11 9 When separating the TRB s from the bevel pinion release the calking of the lock nut and remove the bearings Lock Nut Fig 6 13 Note The lock nut should be calked at a point completely apart from the threads may damage the threads of the bevel pinion 2 2 INSPECTION 1 visually check the bearing surfaces of the bevel pinion and ring gear teeth Note The bevel pinion and the ring gear should be replaced as a pair 2 seriously wo
155. ontrol unloading valve and holding check valve 4 2 SPECIFICATIONS Maximum operating pressure 300 Kgf cm 4267 psi Maximum flow 30 liters 1831 cu in min C port leaks 10 milliliters 0 61 cu in min Fluid temp 50 C pressure 100Kgf cm 1422 psi Lowering Position E A m DR i EE ot ELI eer THIN UR ooo iir s t A Raising Position Fig 9 38 4 3 DISASSEMBLY AND INSPECTION valve spool Sequence valve spring E a 4 4 OPERATION 1 Neutral position In the neutral position convensater spool 711 in open Unload Main spool 311 and check valve 511 531 1s closed and its pressure 1s enough to rest the force of lift arm P External pressure NE Pump Pressure A Cylinder Reservoir pressure 3 Tank Pressure Circuit diagram in the neutral position e LLLI E M Y A E As ae A AAA Sa onde imd 9 22 2 Lifting position As main spool is moved to lifting position pump pressure is increased and open the check valve 511 531 The lift arm moved to lifting position by flowing to cylinder and operate piston T P External pressure Pump Pressure Unload Reservoir pressure Tank Pressure Fig 9 44 9 2 2 Lowering position If main spool moved to lower positions pump is unloading and the lift arm moved to lower position by flowing to tank in the cylinder
156. otrude 3 If MID PTO lever is ON before MID PTO switch is ON position It is normal operation and if MID PTO 1s to be stopped MID PTO switch must be OFF position 4 The PTO switch must be OFF before PTO is engaged Normal process Engage MID PTO lever to ON gt MID PTO switch ON The speed of MID PTO is 2 000 rpm Use the mid PTO lever to engage Decrease engine speed to near idle Make sure that PTO switch is OFF If operator turns off PTO switch Rear PTO and Mid PTO are off at once Do not operate any implement at a high speed than is specified for it When making adjustments to the implement stop the engine to avoid serious injury When remove the Key Set the parking brake CAUTION 5 14 ISSION Case 3 Rear transm d i 1 r r r l 1 1 l 1 1 1 4 i d 1 I k E 1 I 1 1 l H i 4 I I 1 F E 1 1 1 1 a LI E N ncm S N 2 Ty e A e I Ml _ a os A V ed B Nri f SEN T EL a V E g Ii aa ON M ease ie Ten Mor pS Ao alh X I SNN L Vd zem LAT JARS ae m e a ULL 7222 m amm mud SO a LT HN IE M apres NU N SN y 7 i 22 IM XL YG E PAA i p AAAS 2 vi AN tS imum ea A A NE rarae rr an ae e a ae a a A A P A O Pr a rar aT m
157. parts through which there is any possibility of oil leaks such as stud bolts and tapped through parts 6 Each lock nut must be tightened securely 7 When tightening bolts and nuts refer to the tightening torque table 8 After installation each grease fitting should be filled with grease 1 When installing grease fittings of type B and C be sure to turn the fitting tips in a direction that will provide easy access for a grease gun 9 Other precautions 1 Be sure not to damage any finished surfaces or parts 2 Always refrain from forcing installation 3 Each lever knob should be installed coated with an adhesive SUPER THREE CEMENT TB1702 2 3 4 Each contact surface should be coated with an adhesive THREE BOND TB 1215 and tightened evenly with bolts Adhesive coated surfaces should be installed within 30 minutes after application of the adhesive The contact surfaces should be flawless and free from foreign matter and especially from grease before application of the adhesive 5 Precautions for applying adhesives The surface or the thread where and adhesive 1s to applied should be completely free of chips The surface or the thread where an adhesive is to be applied should be completely free of oil ness SECTION 2 OPERATION CHART FOR DISASSEMBLY AND REASSEMBLY BY MAJOR BLOCKS Axle Bracket Front Axle Ls Power steering eAir cleaner eRadiator eOil cooler Engine front parts
158. pecial screws 20 22 23 Fit screws with O rings Remove the retainer fork Tighten all five screws cross pattern with 30 3 Nm 3 daNm Note With open center units the screw with no oil flow connection must be fitted in port E If the OSPM must be mounted with a Pressure relief valve lift it out of the tool and place it on the four pins with the axle journals upwards STEP 15 Piston 30 Fit the piston Spring 31 Fit the spring STEP 16 Adjustment 30 Screw in the adjusting screw STEP 17 Test a Lift OSPM out of the tool and prepare it for testing The pressure relief valve can be set either on a test panel or in a system with pressure gauge read off b Insert plastic plug STEP 18 Dust seal 1 Guide the dust seal ring down over the shaft end press into place in the housing with assembly tool SJ 150L0396 01 Note The dust seal must be fitted after testing so that any leakage from the shaft seal can be detected 8 11 SECTION 5 TROUBLESHOOTING Problems and probable causes 1 Steering wheel is very heavy to turn 1 Poor assemble between steering column and unit 1 Spline of column and unit are assembled tightly 2 Spool of unit is seized by spline of column 3 Poor rotation of column 2 Insufficient pump pressure or fluid volume 1 Check pump delivery Unit volume 120 rpmX 1 15 2 Check oil tank fluid volume 3 Check pump pressure 3 Trouble internal steering
159. peed range shit and transmission range shift levers The lever can be separated in the middle 7 Disconnect the PTO change and 4WD change rods from the transmission e FIG 2 41 operator s seat 2 16 8 Remove the operator s seat 9 remove the position control lever 10 Remove the lever guide 11 When the tractor is equipped with an optional remote control valve remove the remote control valve and relevant parts from the bracket FIG 2 42 Remote control valve optional 12 remove the back panel 13 remove the fuel tank cover 14 Drain the fuel of fuel tank 15 Remove the fuel tank and tank stay 16 Remove the floor frame 17 Drive in a chock between the front axle housing and axle bracket FIG 2 43 Chock 18 Place a jack under the bottom of the spacer transmission case to support 19 Lift up the rear transmission and remove the right and left rear wheel 20 Remove two rubber mounts 27 Remove magnetic cruise 28 Remove MID PTO stopper assembly OWN li Eh Rubber mounting bolts 4 1 FIG 2 44 Pae rubber mounts 21 Lift up the rear end of the floor fender assembly by about 10 mm and place wood between the spacer transmission case and floor panel 22 Drain the transmission of oil 23 Remove the assembly of the remote control valve and piping 24 Remove the forward and reverse pedal 25 Remove the oil damper assemb
160. permanently deform the snap rings 2 Installed snap rings should be seated securely in the groove 3 Be careful not to overload the snap ring to the extent that it is permanently deformed 4 How to install the snap ring When installing a snap ring install it as shown in the figure with its round edge side turned toward the part to be retained This round edge is formed when the snap ring 1s pressed out Snap ring Snap ring Round edge side Fig 2 1 5 Spring roll pins 1 Spring pins should be driven in properly as tightly 2 Spring pins should be installed so that their seams should face the direction from which the load is applied Fig 2 2 3 The roll pins installed in the transmission or other parts where much force is applied should be retained with the wire 6 Cotter pins When installed cotter pins should be bent securely at the ends as shown in the figure Gee Fig 2 3 7 Bolts and nuts 1 Special bolts are installed at several locations so be sure not to interchange them other bolts 2 Bolts and nuts should be tightened to their specified torque wrench 3 When locking the bolts or nuts with wire or a lock washer Be sure to wind the wire paying sufficient attention to its winding direction and bend the lock washer for secure looking 4 When locking bolts and nuts with an adhesive apply the adhesive on the thread and tighten securely 5 Apply an adhesive THREE BOND TB1104 to
161. que Foot pounds to Kilogram meters EE i NO Mh ee ACIES e el al wl Sn Kg m Kg m kym Kg m kym kom Kg m Kg m kym kom 0 138 0 276 0 414 0 552 0 6900 0 828 066 1 104 1242 60 8280 8418 8 556 8 694 8 832 8970 9108 9246 9384 os 60 90 12 420 12558 12696 12 834 12972 13 110 13 248 13 386 13524 13662 90 13 800 13 938 Up 7380 nam 21 690 28 930 36170 43 400 50 630 57 870 65 100 72 300 93 990 101 230 108 470 115 700 122 930 130 170 137 400 10 20 E 20 216 900 238 590 260 300 282 000 289 200 296 430 303 670 310 890 318 130 332 600 339 830 354 300 361 500 368 730 383 190 390 430 397 670 404 900 412 130 419 370 426 600 506 100 513 330 535 030 563 970 571 200 aol 578 400 585 630 592 870 600 090 607 330 621 800 629 0301 6362701 643 500 80 7 NER ss 96O aso 39230 om aio Ge650 ssl ee269 10 98 100 107 910 117710 127 520 137 380 147 130 156 910 166 750 176 550 186360 10 80 784800 794 610 804410 814220 824 030 833 830 843 610 853 450 863 250 873 060 8O 90 882 900 892710 902510 912 320 922130 931 930 941 710 951 550 961350 971 160 ol Newtonmeters to Kilogrammeters fee ee a Oe O 0 AON O a OI ll O Ni Kg m Kg m Kgm Kg m Kgm Kg m Kgm Kg m Kgm kym 600 61200 62220 63240 64260 65 280 66 300 67 320 68340 69 360 7o3
162. r wear Hydrostatic Motor Inspection 1 Inspect the needle bearings in the back plate and the motor housing If the needles remain in the cage and spin freely there 1s no need to replace them 2 If the needle bearing in the motor housing needs to be replaced it can be pressed out with the appropriate size bearing driver If the bearing in the back plate must be replaced it must be pulled out with a slide hammer or blind hole puller IMPORTANT When removing bearing from back plate be extremely careful to not damage machined surfaces 3 Inspect the bronze side of the valve plate for ear Replace the valve plate 1f any wear scoring or scratches exist 4 Inspect the piston block surface that makes contact with the valve plate This surface should be smooth and free of deep scratches 5 Check the piston movement in the piston block bore If the pistons are sticky in the bores examine the bores for scoring or contamination Piston shoe b po Spider Piston block 6 Remove the pistons and spider assembly 7 Examine the outside of the pistons for finish condition They should not show wear or deep scratches 8 inspect the piston shoes for a snug fit on the ball end of the pistons Check the face of the shoes for a flat smooth surface 9 Examine the spider for wear in the pivot area 10 Examine the pivot to ensure smoothness and no signs of wear Wear Surface 4 34 11 Inspect the cam washer shoe surface It
163. radiator cores to see if they are clogged with fur or rust remove the radiator cap and check for transparency of the coolant and for rust or fur formation around the radiator throat inside the radiator If some rust or fur has formed or the coolant transparency is very poor the radiator should be cleaned a Cleaning the radiator inside Place the radiator upside down and supply pressurized water from a faucet to the lower tank draining through the upper tank as shown in the figure to wash out accumulated deposits Radiator cores Upper tank 3 4 Clean with a detergent When cleaning the radiator with a detergent follow the instructions given by its manufacturer Different detergents have different characteristics b Cleaning the radiator exterior Cleaning the net wire mesh After the tractor has been operated in dusty conditions check the net daily and clean it if necessary Cleaning the radiator cores Clean the radiator cores by applying water spray or compressed air so as to for a right angle with the radiator cores moving water application in parallel Note When cleaning the radiator cores with pressurized water be sure to apply it at a right angle to the cores Slanted application might deform their cooling fins 3 Visual inspection of the exterior parts When the radiator exterior 1s corroded cracked or badly damaged replace the radiator Also replace damaged or fatigued water hoses Retigh
164. re rarely scratched and should be smooth 2 If there are many scratches on the bore walls or on parts which are in contact with the gears which can be readily felt or when the latter parts are darkened the gear pump set should be replaced Outlet Gear side Fig 9 26 Bushing Problem and causes are as below a contaminated fluid b overload by relief valve damage c cavitation or airation d overheat of fluid e Low density of fluid 4 Some evidence of contact can be found around the intake port of a bushing once used The normal contact tracing is less than half the length of the bushing bore and less than 0 03mm 0 0012 in in width If width is more than 0 03 mm 0 0012 in Replace the bushing Less than 0 03mm 0 0012in Fig 9 27 Bushing 4 GEAR DWith clean working fluid surfaces are rarely scratched and should be smooth 2 If roughness can be felt by a finger nail they are darkened or the shaft diameter 1s less than 0 03 mm replace the shaft 3 Usable shaft diameter is as below Shaft diameter less than 0 03 Fig 9 28 gear shaft 5 Oil seal The oil seal prevents oil leaks by 1ts inner seal lip and dust from invading by its outer dust lip Therefore if an oil seal has damaged or deformed lips it should be replaced 6 MEASUREMENT OF THE PUMP The best way to measure for the pump is to use a special tester But if it s not available Use installed tractor Remove the plug in the delivery pipe o
165. red with the steering 100 unit in neutral position On the OSPM ON the mt Ll 1 1 1L pressure drop is measured from P to 1 The values 4 1 he an Lll are valid at an oil temperature of 50 C 122 F anc Lll a viscosity of 21 cSt 100 SUS mr uil lw li d EE C1 A OSPM 32 ON all PB B OSPM 50 100 ON 8 5 SECTION 4 Disassembly Inspection And Reassembly 1 Major component of steering valve orbitrol T t Torque S0Nm 22 J 1 Dust seal ring 2 Housing spool and sleeve 3 Ball 4 Ball stop 5 Shaft seal 7 Bearing 10 Ring 11 Cross pin 12 Set of springs 13 Cardan shaft 14 Spacer 15 0 ring 16 Distributor plate 17 Gear wheel set 18 O ring 19 End cover 20 0 ring 22 Special screw 23 Special screw 24 Name plate 30 Complete relief valve 8 6 2 SPECIAL TOOLS A Holding tool code no SJ150L9001 01 BT as B Assembly tool for shaft seal 617 5 code no code no SJISOL4011 01 CAM Ad AIM 312 10 C Assembly tool for shaft seal 919 2 code no SJ150L4012 01 DM 4150313 10 D Assembly tool for dust seal ring code no SJ150L0396 01 DANH CSS 4160 614 1D og eat ely Sie ae TEE E Pliers for piston in pressure relief valve code no SJ150 9000 25 DAMFOSS 415015 150 8 7 F Fork for fitting cardan shaft OMM SJ 151G9000 1 ODANI Cs Ale 1230 10 G Ordinary hand tools Socket spanner 5 8 in Ratchet spanner 1 2 Torq
166. ring Cylinder Via R port at right turn and via L port at left turn As follow figure shows components composition of power steering system on the vehicle with the Orbitrol 1 hydraulic oil cooler 2 Gear pump 3 Cooler return Line 4 Steering Control Unit 5 Hydrostatic Unit Fig 8 1 8 1 SECTION 2 SPECIFICATIONS 1 GEAR PUMP MODEL Delivery cc rev Maximum pressure kgf cm Rated operation speed rpm Rotation direction 2 Power steering valve Unit orbitrol MODEL Model number Displacement cc rev Rated flow min Maximum system pressure kgf cm Max back pressure kgf cm Max temperature C Input torque N m Inlet relief pressure setting kgf cm Recommended filtration 18504406 Weight kgf 3 OIL TANK MODEL TANK Fluid volume 4 Fluid 8 2 T303HST T353HST 6 5 180 500 3500 C C W as viewed from shaft T303HST T353HST OSPM 80 ON 80 7 20 180 20 90 0 8 1 5 110 115 22 20 17 21 T303HST T353HST TRANS MISSION D THF500 SECTION 3 FUNCTION OSPM is a hydrostatic steering unit which can be used with an add on steering column OTPM OTPM T or with the steering column integrated with the unit The steering unit consists of a rotary valve and a rotary meter Via a steering column the steering unit is connected to the steering wheel of the vehicle When the steering wheel is turned oil is directed from the steering system pump via the rotary valve and rotary me
167. rn or damaged parts should be replaced 6 7 2 3 REASSEMBLY Reassembly the parts in reverse order of disassembly following these instructions Each friction surface should be coated with grease in advance 2 The bevel pinion and the ring gear make a distinct pair after a mesh adjustment performed at the factory Consequently when reassembling the pair be sure to pair parts with a same reference number Tighten the lock nut to the specified starting torque of the single unit of the bevel pinion Fig 6 14 Note Asa general rule a disassembled lock nut should be replaced and a new one should be installed However when there is no alternative but to reuse the disassembled lock nut assure that it can lock securely Note Measure the starting torque a manner as shown in the figure 6 14 Specified starting torque 6 7 Kgf cm 0 43 0 51 ft Ibs When any of the bevel pinion ring gear TRB collar etc has been replaced inspect the bevel pinion assembly for thrust play in the front axle housing ZA aw Specified thrust play 0 1 0 3 mm in 0 004 0 011 in Note TRB and collar should be replaced as a pair 1 Bevel pinion 8 Lock Nut Fig 6 15 Calking point 2 FRONT DIFF CASE a When installing washer and thrust washer apply fresh Molybdenum grease ahead of time b Apply fresh Molybdenum grease to teeth of diff pinion and dif side gear c Each parts should be wash
168. rned to the lock position 2 Stuck poppet of slow Lap after disassembling cleaning repairing Return check valve flaws with oil stone 3 Seized lift shaft Apply grease and repair or replace bushings or shaft if necessary 4 Stuck main spool Lap lightly after disassembling cleaning and repairing flaws with oil stone or replace as an assembly 5 Too slow lift 1 Above mentioned causes Repair or adjust according to instructions lowering speed can also be possible mentioned above 2 Insufficiently lowered Lower lever sufficiently control lever 3 Excessively closed slow Open valve sufficiently return check valve 6 When hydraulic 1 Maladjusted lever stopper Readjust lever stopper guide position control lever is check valve raised relief valve besos 2 Poor link mechanism Inspect readjust repair or replace link dd mechanism if necessary 7 Fluid I Excessively high working Inspect and adjust overheating pressure 2 Too high or low viscosity Replace with fluid of adequate viscosity of working fluid 3 Insufficient fluid Maintain specified level by replenishing 9 28 Problems Causes Countermeasures 8 Pump noise 1 Partially clogged suction filter or Clean suction piping 2 Air inhaled through suction Inspect and retighten piping and intake pipe connections for pump 3 Loosened pump cover tightening Inspect and retighten bolts 4 Too rich oil viscosity Replace with fluid of adequate viscosity 5
169. sary before resuming lest See brake section 13 Slowly depress forward directional pedal and observe gauge Gauge should slowly rise to approximately 41368 KPa 1378KPa 6000psi 200psi and relief valve will open with an audible squealing noise 14 Repeat same procedure with reverse pedal Specifications Pump pressure should reach approximately 41368 KPa 1378KPa 6000psi 200psi in either direction and then relieve Results If pressure will not reach 41368 Kpa Maximum 6000psi in either direction check charge Pressure SEE CHARGE PUMP PRESSURE TEST on page 14 If charge pressure is good and hydrostatic pump pressure will not get up to relief pressure hydrostatic pump is worn or damaged If pressure reaches 41368KPa 6000psi in one direction and not the other one of the relief valves is defective or the seat is leaking 3 CHARGE PUMP PRESSURE TEST Reason To ensure that charge pump is operating at specified pressure to supply oil to hydrostatic pump Equipment JT03344 2 000 Kpa 300 psi Gauge JT03017 Hose with quick coupler JT03240 7 16 20M 37 X7 17 20 F 37 Elbow J103264 Quick coupler F7 16 20 F 37 Adaptor JT05480 Quick coupler MXM14 1 5 ORB Adapter Procedure Park tractor on a level surface and set park brake 2 Turn key switch to OFF position 3 Shift transmission to NEUTRAL IMPORTANT Make sure to relieve system pressure before loosening any system lines or hoses 4 Cyc
170. sitioning Available shims on drive pinion ring gear support between drive pinion and ring gear metal support shimming Shim A 0 1 mm Shim B 0 2 mm Available shims on dif case Shim A 0 1 mm Shim B 0 2 mm 11 2 Part names and Nominal Standard value Usable limits Service instructions inspection items dimensions for reassembly and remarks 2 DIFFERENTIAL Backlash between 0 1 0 2 mm Pinion thrust collar or dif pinion and dif gear side gear 4 FRONT AXLE CHAPTER 6 1 Front drive axle 4WD Tire inflation Front 2 2 kgf cm Rear 1 8 kgf cm Wheel alignment DToe in 2 6 mm Camber 3 1 3 Caster 1 1 Rocking angle 5 1 Steering angle 52 1 Front ws oom 9459 wear limit 01 am un bush 50 X 55 x 20 55 35 mm wear limit 0 2 mm Rear omnia 97w arg weartimit 0 1 m rane bush 75 X80 x30 75 2 mm wear limit 0 2 mm osm 0 0 2 mm 0 5 mm Adjust with adjusting bolt DIFFE Pinion 0 05 0 06 kgf m RENT gear Play in bush Thrust play Starting torque 0 1 0 3 mm 0 1 0 2 mm shim 0 1 0 2 mm shim 0 1 0 2 mm Thrust play Drive pinion ring gear backlash 11 3 Part names and Nominal Standard value Usable limits Service instructions inspection items dimensions for reassembly and remarks 5 REAR AXLE CHAPTER 7 1 DISK BRAKE FRICTION 4 7 0 1 mm PLATE THICKNESS WEAR AND CARBONIZER 2 SEPARATE PLATE T
171. snap ring gt wmm 3 Remove bearing cones from both ends of the control shaft Inspect bearing cones for smooth Remove the internal snap ring retaining the operation wear or damage Replace parts as seal needed NOTE Use care when pressing shaft out of housing to prevent shaft from falling to floor and being damaged 2 Press the shaft out of the housing from the back plate side until the seal releases from the bore Thrust washer 4 Replace seal in shaft end cover Thrust Bearing 5 Inspect bearing cups for wear or DEDE NB MEE damage Replace bearings as needed E snap ring as Seal atr Internal Snap Ring 3 Remove the seal and washer 4 Remove the retaining Ring from the shaft Remove thrust washers and thrust bearing Cam plate Control disassembly _ Plaim end cap 4 28 7 Remove shim thrust plate a A T m 1 y E E L A 3 8 Remove thrust plate 2 Inspect the piston block surface that makes contact with the valve plate This surface should needle bearing be smooth and free of deep scratches 3 Check the piston movement in the block bore If the pistons are sticky in the bore examine the bore for scoring or contamination Pivot Shoe face Spider 9 Inspect needle bearing in housing If the needles remain in the cage and spin freely there is no need to replace them If replacement is necessary bearing may be removed with a bearing driver 4 I
172. t and engine fly wheel 2 Move tractor sections together and retain with 5 screws Tighten bolts to 90 110N m 3 Remove screws retaining splitting stands to tractor sections Remove splitting stands NOTE Tractor shown split for clarity 7 Connect two hydrostatic charge pressure tubes to hydrostatic transmission Tighten to 40 57N m 30 43Ib ft Check opposite ends of both tubes to make sure they are tight 8 Install a new hydraulic oil filter OO rent c LE EE ES a 1 O we bh hs FES Sy y Sy SS 8 y gt AO NS TN NO WW Op LU rq 4 Install rod as an assembly Attach turn buckle 9 Install 4WD drive shaft and couplers Slide to hydrostatic control linkage and retain with nut 5 Connect switch connector 4 2 10 Install hydraulic supply tube to tractor 336mm 13 22 in Connect hydraulic supply tube to SCV Tighten tube nut to 55 79N m 40 59lb ft HA E Us AM m d UR HL 14 Connect lower brakes rods to rear brake levers Retain with turn buckle and nuts 11 Connect hydraulic pressure tube at lower Left side of Transmission NN Es asc A Net d LA F ET mw Ee Ja w Turn buckle Brake rod 15 Route wiring harness through cable clips Locate and connect all electrical connectors attaching wiring harness to switches and lights on rear half of tr
173. t to damage it or allow it to fall 3 After installation The Arm comp shift should slide with the designated grooves 6 Drive pinion Sub assembly 1817 16151131411 279 1 Metal pinion 2 Taper roller bearing 3 pinion drive 10 4 Taper roller bearing 5 Gear spur 23T 6 Nut M30X1 5 7 Washer 28X46X03 8 Needle bearing 9 gear spur 40T 10 Hub 28X51X59 11 Snap ring shaft 12 Gear spur 33T 13 gear helical 22T 14 needle bearing 15 Washer 20X34X03 16 Ball bearing 17 Washer 20X30X 1 8 18 Snap ring shaft 5 32 Note a Apply oil to the drive pinion and related parts ahead of time Then install them and tighten the assembly to the specified torque b Be sure that the starting torque of the drive pinion meets the specified level Starting torque is 8 11 Kgf m 0 08 0 1 I KN cm c After the starting torque has been adjusted to the specified level crimp the lock of the nut at one point as illustrated d Be sure that these parts should turn smoothly When the drive pinion or the ring gear has been replaced the proper number of shims to be installed should be determined based upon the following procedure Crimping Crimping Drive pinion 1 Gear range 13X20X29T 2 Ball bearing 6207 3 Needle bearing 4 Gear spur 30X35T 5 Washer 25X46X07 6 Ball bearing 6305 Note 1 Apply grease when installing Needle bearing 2 pay attention to the installed direction of gear spur 30 35 3 After installation be s
174. tal F If the measured value 2 Remove the right and left tie rods exceeds the usable limit replace the bush 3 Suspend the front axle bracket with a chain 4 Remove the front metal clamping bolts The rear front axle can then be separated from the axle Sudan vease ebed O75 bracket 5 Remove the front and rear pivot metals Usable limit 075 35 pivot metal F BOLT S M8X10 Fig 6 4 1 2 INSPECTION 1 FRONT AXLE SHAFT DIAMETER Measure the diameter at a roll bush contact point with a micro meter or vernier calipers If the measured value is less than usable limit replace the housing front axle or bush in Metal pivot F or Metal pivot R Fig 6 6 3 Worn or damaged oil seals O rings bearings etc should be replaced 1 3 REASSEMBLY Reassemble the parts in reverse order of disassembly following these instructions 1 Lips of the oil seals bush contact surfaces and O rings should be coated with grease in advance 2 When installing the roll bushes abide by the following precautions Use an installer and press in the bush on a press The bore surface should be coated with grease in advance The shim of the roll bush should reach position as shown Fig 6 7 In other words the seam should be in a position which is free from any load 6 4 Axle bracket Pivot metal F Axle housing Pivot metal R Fig 6 7 Note Slanted or forced installation of the bush should be avoided and the bore surface of the
175. ted in the groove in the spacer transmission case 2 Install the reverse shift metal support 3 Install the PTO clutch delivery piping 4 Install brake rods 5 Install the Oil damper Assy 6 Install the forward arm and Reverse arm comp 2 15 7 Install the front wheel drive shaft 8 Position the floor taking care not to allow wiring or other parts to be pinched under it 9 With the floor lifted up a little install the fuel hose and fuel gauge coupler on the fuel sub tank and connect the linear shift control cable 10 Fix the floor at the four rubber mounts 11 Install all levers knobs and Rods 12 Connect the power steering wheels 13 Connect the accelerator wires 14 Install wiring 15 Connect the negative battery cable 16 Install the side covers RH and LH 17 Fill the transmission case with oil T303 T353HST 354 mI FIG 2 39 forward and Reverse arm 5 SEPARATION OF THE SPACER TRANSMISSION AND REAR TRANSMISSION Parts which can be inspected during This operation Drive pinion gear Speed range gear Transmission range shift HST control linkage MID PTO Gears 1 Removal 1 remove side cover LH and RH 2 Disconnect the negative battery cable 3 Remove the slow return check valve knob FIG 2 40 slow return check valve knob 4 Remove the diff lock pedal 5 Remove the parking brake 6 Remove the s
176. ten loose hose clamps securely if water 1s leaking through the hose clamps securely or replace them if necessary 4 Inspection of the radiator cap Check the radiator cap to see if it functions normally using a radiator cap tester as following 0 9 Kef cm 12 79 psi 0 04 0 05 Kgf cm 0 57 0 71psi Pressure valve Opening pressure Vacuum valve Opening pressure Function test The pressure type radiator cap has a pressure valve and a vacuum as shown in the figure Both valves are held against there seats by springs while the pressure in the cooling system remains within a specified range thus keeping the cooling system air tight When the pressure in the radiator rises higher than the specified valves it overcomes the force of the pressure valve spring and open the pressure valve to release excess pressure through the overflow pipe as shown in the figure 1 iT WT Pressure valve Vacuum valve FIG 3 8 00 000 When the coolant temperature falls enough to cause the vapor to condense in the cooling system and decrease the coolant volume the radiator pressure becomes negative When this occurs the vacuum valve opens to let outside air into the radiator as shown in the figure thus preventing the radiator from being deformed DOOQOOOO0Q FIG 3 9 6 RADIATOR REASSEMBLY Reassemble the radiator 1n the reverse order of disassembly Note The rubb
177. ter 9 16 UNF90 9 connector 10 O ring 11 O ring 12 Stay 13 Bolt 14 Pipe 15 Union 16 Pipe 17 Pipe 18 Lever 19 nut 20 Coupling 21 Lever 22 Bolt 23 Grip SECTION 5 HYDRAULIC SYSTEM I HYDRAULIC CYLINDER 1 Hydraulic system must be washed clean and care must be taken not to let any foreign substances 2 The O ring and back up ring should be coated with grease ahead of time Install with care so as not to damage them 3 Install the Piston from the cylinder head side 4 The lift arms should be assembled mutually by reference to their matching marks 5 When installing the control valve apply grease to the O rings and avoid their dislocation or binding during tightening the valve to the specified torque 130 180kgf cm 6 The safety valve should be installed levelly and make sure there is no oil leak through the filter seal Tightening torque is 700 800 kgf cm 7 The spool should move smoothly after assemble the control valve 8 The lift crank should be installed levelly and make sure there is no interference through the pipe YN Apply grease O ring Back up ring Apply adhesive 1901 pis Lift crank Fig 9 33 Hydraulic cylinder EE x E sg B position E Safety valve tightening torque 700 800Kgf cm A position 9 17 Bolt should be locked by wiring Apply grease DN 1 i A A J ul a La MM 7 i li cir B Apply oil i EL I AL pply t1 P
178. ter to the cylinder ports L or R depending on the direction of turn The rotary meter meters the oil flow to the steering cylinder in proportion to the angular rotation of the steering wheel If the oil supply from the steering system pump fails or is too small the steering unit 1s able to work as a manual steering pump OSPM ON Open center steering units have open connection between pump and tank in the neutral position 8 3 3 1 TECHNICAL DATA OSPM 20 l min 5 28 US gal min 30 C 22 F 60 C 140 F Permissible temperature assuming 120 C 248 F for 20 minutes non activated steering unit 30 C 27 F 90 C 194 F Max input flow Ambient temperature Surface treatment Oil temperature Oil viscosity Filtration Max degree of contamination ISO 4406 Steering torque Manual steering MANUAL STEERING PRESSURE Under normal operating where the steering pumps supplies an adequate oil flow at the required pressure the maximum torque on the steering wheel will not exceed 2 Nm 17 7 Ibf in If the oil flow from the steering system pump fails or is too small the steering unit functions automatically as a manual steering pump Manual steering can only be used for a limited control of the vehicle if a sudden drop of pump pressure occurs The Pm 50bar 725 psi shows the manual steering pressure Pm for all sizes of Sauer Danfos steering units type OSPM at a steering wheel torque of 80 Nm 708 Ibf
179. the following If not Skip to step 10 NOTE Control shaft turning force measurement is taken while shaft 1s turning Amount of force required to begin turning shaft is higher Retaining Ring N 9 Using a suitable torque wrench measure the Spring amount of force required to turn the control N shaft While the shaft 1s turning the amount of qi turning force should be 25 5lb in Increase or decrease the amount of shim on the shaft end of the cam plate until the force required is within the specification Pins Washers N Pin retainer gt mM Y 2 Install the three pins in oversize grooves in spline end of piston block with the heads facing inside of the block External snap ring Install the pin retainer A Thrust washer 4 Install the washers and spring O Thrust Bearing Thrust washer 5 Using same tools used to compress spring External snap ring during disassembly of block install washer el spring second washer cap screw and nut in the piston block Internal Snap Ring 6 Compress spring 7 install retaining ring 8 Remove spring compression tools from the 4 31 piston block Shoe face Pivot 9 Place an appropriate size socket in the hole in the piston block to keep the pivot in place while installing the pistons Slide the pivot down so that the flat side rests on the top of the three pins 10 With the pistons in place in the spider lower the pistons into the piston block NOTE It is not necessary to p
180. this cap 1s apt to be damaged when removed 5 Detach the snap ring C from the bevel gear 6 Extract the wheel shaft bearing together with the bevel gear using a bearing puller Fig 6 20 Fig 6 21 7 Remove the stop ring and the wheel shaft can be extracted 8 Remove the seal from the the wheel shaft cover 9 Remove the cap 11 from the bottom of the final case B and detach the snap ring hole Then the counter shaft 8 and RBB can be removed Note The removed cap 90 black plug should be discarded and replaced when reassembled 3 2 INSPECTION 1 Wheel shaft cover Inspect mechanical oil seal O rings Gears cases etc and replace them 1f worn or damaged Measure the diameter the part which makes contact with the wheel shaft with a micro meter or vernier calipers When the measured value less than the usable limit replace the wheel shaft cover Standard value Usable limit 2 Final Drive case B Measure the diameter the part which makes contact with the Final drive case A with a micro meter or vernier calipers When the measured value less than the usable limit replace the wheel shaft cover Standard value Usable limit 3 3 REASSEMBLY Reassemble the parts in reverse order of disassembly following these instructions 1 Apply an adhesive THREE BOND TB1215 to the following parts a Contact surfaces between the final case B and wheel shaft cover b Co
181. til the bearing race is recessed in the bore approximately 2 0mm 0 3mm 0 078 in 0 15in Be sure that the numbers on the bearing race are facing to the outside of the housing thrust plate 4 30 2 Apply a small amount of grease to back of thrust plate and install thrust plate into cam plate 3 Install shim 5 Install bearing cones to both ends of the control shaft V O ring IMPORTANT Old O rings gaskets and seals 1O install the external snap ring thrust washer will leak Always install new O rings and thrust bearing on the shaft install the gaskets and seals during assembly outside thrust washer and external snap ring 6 Install new O rings on shaft end cap and 11 Install the washer and a new seal onto the shaft plain end cap Plain end cap Shaft end cap Internal snap ring hu 12 Install the shaft assembly into the housing Using the appropriate size socket or a clean piece of pipe tap the shaft seal into the bore in the housing until the seal is below the retaining ring groove Secure shaft into housing with internal snap ring 7 Install plain and shaft end caps Retain with three cap screws 8 Rotate control shaft and feel for smooth operation Check for end play If there 1s end play remove shaft end cap and increase shim thickness until there 1s no end play Rotating assembly installation 1 If the piston block assembly was disassembled complete
182. to SC V 40 57 N m 30 43 lb ft Charge pressure Tubes to transmission Adapters 55 79 N m 40 59 Ib ft Cam plate bearing Caps Cap screw 37 42 N m 27 31 lb ft Tunnel Section to Differential housing Cap Screws 126 154 N m 95 115 Ib ft Tunnel Section to Clutch Housing Cap Screws 126 154 N m 95 115 lb ft 4 1 1 SPECIAL OR ESSENTIAL TOOLS Note Order tools according to information given in the U S SERVICE GARD Catalogue or in the European Microfiche Tool Catalogue MTC Parts number parts name JT07335 1 2 3 Splitting Standard and Brackets JT03344 2 000 Kpa 300 psi Gauge JT03362 68947KPa 10 000 psi Gauge JT03364 Hose with quick coupler JT03017 Hose with quick coupler JT03240 7 16 20M 37 X7 17 20 F 37 Elbow JT03264 Quick coupler F7 16 20 F 37 Adaptor JT05480 Quick coupler MXM14 1 5 ORB Adapter 2 0THER MATERIALS Number Name Use U S A Canadian Petroleum Grease John Deere Clean and cure primer pump and Motor Reassembly TY 16021 John Deere High Flex Form in place Gasket Hydrostatic Transmission to Tunnel Seal TY 15934 John Deere General Purpose Gasket Dressing Sealing Gasket and Hoses 4 2 SECTION 2 COMPONENT LOCATION 1 Hydraulic Hoses and lines 1 hydraulic oil cooler 2 Gear pump 3 Cooler return Line 4 Ste
183. ue wrench 0 70 Nm 0 7 da Nm Allen keys 5 amp 8 mm a flats Small screwdriver ground sharp Pincers 3 Disassembly Separate the orbitrol referring to Fig 8 2 of SECTION Disassembly Inspection And Reassembly 1 Major component of steering valve orbitrol STEP 1 Column If there 1s a steering column on OSPM place the unit in the holding tool on the four locating pins with steering column upwards Dismantle the steering column STEP 2 Pressure relief valve 30 31 If there is a pressure relief valve in OSPM remove the plastic plug from the adjusting screw and unscrew with the 5 mm a flats Allen key Remove the spring and use special pliers lift the valve cone out of the housing Lift OPSM clear of the holding tool turn it so that the output shaft points downwards and place it in the holding tool again Note the locating pin in the tool must engage with the OSPM housing STEP 3 Special Screws 22 23 Remove the screws with a 16 mm a flats 5 8 spanner End cover 19 Remove end cover sideways STEP 4 Gear wheel set 17 18 Hold a hand under the gearwheel set to keep the gearwheel from falling out Remove O rings STEP 5 Distributor plate 16 Remove distributor plate Cardan shaft 13 Remove cardan shaft STEP 6 O ring 15 Remove O ring from housing Balls and ball stop 3 4 37 Shake out check valve ball not in all units ball stop and emergency steering b
184. uld be written down or memorized for later reference 3 MEASUREMENT OF THE RELIEF PRESSURE 1 3 POINT TO TEST RELIEF PRESSURE DRemove the plug in the delivery pipe on the right hand side of the transmission case and install a compression gauge to measure the pressure Keep the engine speed at 2600 rpm and shift the position control lever at the highest position Control valve coupler 3 Remove the plug in the hyd pump flange and engage the pressure gauge and measure it Measurement the Pressure must be done 3 times and should be set within specified pressure Specified relief pressure 145 5 kgf cm S GEAR PUMP 1 GENERAL DESCRIPTION This pump induces fluid from one side and delivers it from the other side by rotating two gears meshed with each other The actual delivery 1s as mentioned below considering the consequences of fluid temperature and volume efficiency in accordance with revolution speed That is dual pump system 2 Gear pump 14 Fig 9 12 Gear pump Drive shaft 3 OPERATIONS This pump induces fluid from one side and delivers it from the other side by rotating two gears meshed with each other The actual delivery is as mentioned Fig 9 13 Considering the consequences of fluid Temperature and volume efficiency in accordance with revolution speed Fig 9 13 Gear pump 9 10 4 DISASSEMBLY NOTE DBefore disassembling the pump wash the outside clean In the course of disassembling operation
185. ure to slide smoothly Fig Sub change counter shaft and related parts 5 33 S Differential gears 1 eto Ros cu Fig 5 58 Bevel 10X51 2 Case Diff L 3 Gear bevel 20 5 Thrust collar pinion 6 pinion Diff 12 7 Shaft diff pinion 8 Case Diff R 9 plate lock 10 Bolt differential 11 Nut 12 Ball bearing 6011 Differential gears and related parts Note 1 When assembling without replacing the pinion gear and ring gear with new ones provide the same shimming thickness as that provided before disassembly 2 Backlash between dif pinion and dif side gear should be within as range of 0 1 to 0 2mm 0 004 0 008 in and these parts should turn smoothly 3 When reassembling the used pinion and ring gear reinstall the same thickness of shims as was installed before disassembly in each shimming position 4 Backlash adjustment between the drive pinion and the ring pair Fig5 8 1 As the drive pinion and the ring gear make a pair be sure not to mate them with other parts from differential tractors 5 Adjust the shimming to backlash of 0 1 0 2 mm 0 004 0 008 in The standard shimming is 0 4mm 0 016 in on both sides 5 34 6 PRECAUTIONS FOR DISASSEMBLY INSPECTION AND ASSEMBLY 1 Disassembly When drawing a shifter stay from its shifter be careful not to lose the steel ball It can jump out of the shifter 2 Inspection Shifter disengaging load Main change and sub change 18 22 Kgf 40 49lbs A
186. ut the pistons in the original position Any piston can be installed in any hole a Rotating assembly 11 Tilt the pump housing so that the open end is facing slightly downward 12 Slide the rotating assembly up the shaft until it meshes with the splines on the shaft Er OPE TET iol Valve plate Pa kae t 13 Apply a small amount of grease to the steel side of the valve plate to hold it in place during pump installation 14 Install pump valve plate on back plate 15 Place a new gasket on the pump 16 Install the pump assembly on to the back plate assembly Make sure valve plate and gasket stay in position Tighten the socket head cap screws to 37 42N m 27 311lb ft 7 HYDROSTATIC MOTOR DISASSEMBLY Cap erews E E Oye NON e O a _ Hydrostatic 7 r ms Y motor 2 y iz IMPORTANT The motor body is aluminum and can be easily damaged by steel tools Be careful to not damage machined surfaces Do not use screw driver or other sharp objects to pry motor body from back plate I If not already done remove motor from back plate Remove eight socket head cap screws securing the motor to the back plate Tap the motor housing with a plastic mallet to loosen it from the valve plate Keep the assembly level or tip output end down to keep the rotating assembly from sliding off of shaft Pull the motor housing shaft and rotating assembly away from back plate 4 32 es o a
187. ution of the same mixing ratio As antifreeze corrodes point take care not to spill it on painted parts The tractor is filled with a permanent type antifreeze Mobile Long Life Coolant when shipping mixing ratio 50 3 5 8 TROUBLE SHOOTING 1 Overheating 1 Low coolant level 2 Fatigued pressure valve spring 3 Loose or broken fan belt 4 Oily fan belt 5 Poor thermostat 6 Poor water pump or water leaks 7 Clogged water passages 8 Improper injection timing 9 Clogged air ways 10 Fuel gas enters water jacket due to broken cylinder gasket 2 Overcooling 1 Poor thermostat 2 Excessive low atmospheric temperature 3 Lose of coolant 1 Leaking radiator 2 Loosely clamped or broken water hose 3 Fatigued pressure valve spring 4 Leaking water pump 5 Water leakage through cylinder head gasket 6 Cracked cylinder head or body 4 Noisy cooling 1 Poor water pump bearing fan 2 Loose or bent fan 3 Unbalanced fan 4 Poor fan belt 3 6 TABLE 3 1 Countermeasures 1 Replenish coolant and inspect water leaks 2 Replace radiator cap 3 Adjust belt tension or replace 4 Replace 5 Replace 6 Repair or replace 7 Clean radiator and water passages 8 Adjust injection timing 9 Clean radiator exterior 10 Inspect cylinder head and replace cylinder gasket 1 Replace 2 Decrease radiator working area by radiator masking 1 Repair
188. y from drawbar Pulling from any other point can cause rear overturn Do not operate with unshielded PTO Disengage PTO and stop engine before servicing tractor or attaching and detaching implements When towing equipment use a Safety chain FAILURE TO FOLLOW ANY OF THE INSTRUCTIONS ABOVE CAN CAUSE SERIOUS INJURY TO THE OPERATOR OR OTHER PERSONS Location On rear frame Part No 1260 904 065 0A Start engine only from operators seat If safety start switch is bypassed engine can start with transmission in gear Q Do not connect or short across terminal on starter solenoid Attach booster cables as shown on battery decal and operator s manual Starting in gear causing runaway can result in serious injury Location OndashoversideLH SEmYeNw O Part no 1260 904 062 0A _ i S A Always fasten Your seat belt 1200 010 0190 orh LOCK bUNLOCK f LOCK BUTTEN Push dre position joystick lever Is neutral whenever the implement is not operation KN Stay clear of raised Boom and bucket UNIVERSAL SYMBOLS Some of the universal symbols have been shown below with an indication of their meaning Engine speed Pressured d Corrosive rev minX100 open slowly substance Hours Continuous Tortoise recorded A variable gt Slow or minimum Sett
189. ydraulic pressure tube at lower Left side of Transmission 22 Disconnect hydraulic supply tube at SCV or manifold block Remove tube t 23 Remove 4WD drive shaft and couplers by removing snap ring and sliding couplers onto shaft until clear of stub shaft 2 Remove magnetic cruise at front transmission 4 19 24 Remove hydraulic filter 336mm 13 22 in YY e AD Hydraulic oil filter 25 Disconnect two hydraulic charge pressure tubes from hydrostatic transmission SAN SAT P QA 7 VO IRIAN SSA ed V i iA 26 Loosen hose clamp and disconnect suction tube from manifold 29 Remove 5 screws connecting tunnel to flywheel housing Note length and location of screws when removing IMPORTANT Check for and disconnect any additional accessory wires or hydraulic tubes connecting rear half to front half before splitting tractor 30 Release park brake and place gear shift in NEUTRAL 31 Gently pry around edges of flanges to separate tractor halves 32 Roll tractor halves apart NOTE Tractor shown split for clarity 27 Disconnect rod from hydrostatic control linkage 4 20 Assemble Tractor Sections NOTE Splines on all drive shafts and couplers 6 Connect suction tube to manifold Tighten hose must be aligned before tractor sections clamp are bolted together 1 Align splines on hydrostatic transmission drive shaf

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