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2. w 1 ech N Jeck lech lt 1 ech 1 ech lech 69 ech lt 1 sch 1 sch j lt sch ech ech ech lt 1 ech 1 ech 1 ech 11 05 ALTERNATIVE PARTS 3 STANDARD ACCESSORIES DESCRIPTION SAFETY GLASSES CODE NO 885 549 REMARKS NT 65M2 885 676 OPTIONAL ACCESSORIES CODE NO 881 768 DESCRIPTION GRIP TAPE A REMARKS 880 407 ALTERNATIVE PARTS Printed in Japan 11 05 051115N Q Hitachi Koki Co Ltd
3. Accumulator Plunger 22 Exhaust valve Blow nozzle section Exhaust vent e T e s EBU Accumulator f i Control valve section Piston 12 Grip Rubber A 45 Cylinder 13 Cylinder Plate 16 Cylinder Ring 17 Air inlet WW Lu Driver blade Return air chamber Magazine Cover 71 1 Piston Bumper 18 y e Y Lock Lever 76 i SI Guide Plate A 75 Ww Magazine section Pushing Lever A 43 t Sa Fig 3 Construction 8 2 Operation Principle 1 Before nailing See Fig 4 and Fig 5 Head Valve Spring 8 chamber 1 When compressed air is fed to the main body it fills the accumulator portion Air passage S8 Control valve z section Head Valve A 10 2 At the same time the compressed air flows into the valve piston lower chamber of the control valve Accumulator section and forces the Valve Piston 63 upward Piston 12 Compressed air is then fed through the air supply Trigger C Ass y 36 vent and air passage to the head valve chamber Oylinder hole As a result the Head Valve Spring 8 is pushed Cylinder 13 down to seal Head Valve A 10 and the Cylinder 13 Return air chamber 2 When nailing See Fig 4 and Fig 5 1 When Pushing Lever A 43 and Trigger C Ass y 36 are operated together and the Plunger 67
4. NT 65M2 Hitachi Power Tools TECHNICAL DATA FINISH NAILER ANE NT 65M2 SERVICE MANUAL LIST No E032 Dec 2005 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT Throughout this TECHNICAL DATA AND SERVICE MANUAL symbol s is are used in the place of company name s and model name s of our competitor s The symbol s utilized here is are as follows Competitors Symbols Utilized Company Name Model Name P Porter Cable FN250B Q Bostitch SB 1664FN CONTENTS E Page 1 PRODUCT NAME 1 2 MARKETING OBJECTIVE 80 d cc enun Saad a da Ra 1 SB APPLICATIONS Danae aan aaa anala 1 4 SELLING POINTS ceia ca oa ema ai dansa maaadaaa aaa dea unuia astea iuni daia ai 1 e Tele ua lcg 2 EN Ree ELCHE 2 5 2 Selection taiate 2 5 3 Explanation of the Nailing Action uu uu as 3 e Nall Driving le 4 6 COMPARISONS WITH SIMILAR 5 7 PRECAUTIONS IN SALES PROMOTION 6 721 eelere 6 7 2 Warning BET EE 6 7 3 Related Laws and Regulations 7
5. Cover 3 can now be removed Hex Socket Hd Bolt M6 x 12 1 g Plate 2 Top Cover 3 p Hex Socket Hd Bolt W Sp Washer 5 x 25 4 Cylinder 13 Exhaust Cover 5 O ring 5 44 14 D O ring I D 59 6 15 Cylinder Plate 16 Head Bumper 7 Head Valve Spring 8 pring 20 8 9 d x e Cylinder Ring 17 Piston Bumper 18 Head Valve A 10 Sheet 19 O ring 1 0 31 7 11 Piston 12 Body Ass y 31 Fig 11 Disassembly and reassembly of the exhaust cover head valve A cylinder piston piston bumper etc 20 b Reassembly Groove of the Exhaust Cover 5 Disassembly procedures should be followed in the reverse order Note the following points O ring I D 20 8 9 Apply grease to the inside of the Cylinder 13 O ring I D 31 7 11 and the Cylinder O ring I D 59 6 15 FN SEEN d before reassembly ZEZ lt I 7 y Apply grease to the sliding surface of the Exhaust Cover 5 and Head Valve A 10 and charge about 0 5 g 018 oz of grease in the groove of the Exhaust Cover 5 Fig 12 Apply grease to the lip portions and of Head Valve A 10 Fig 12 Exhaust Cover 5 Head Valve A 10 Apply grease to the O ring 20 8 9 Mount the O
6. Q Lock Lever 76 Roll Pin D3 x 20 77 S gt Roll Pin D4 x 14 80 Pushing Lever Spring 39 Magazine section Nylock Hex Socket Flat Hd Bolt M4 x 6 95 Nylock Hex Socket Pushing Lever 40 ng X Flat Hd Bolt M4 x 10 96 Y Hex Socket Hd Bolt Ratchet Spring 41 W Sp Washer 5 x 12 82 Pushing Lever Guide 38 q0 Adjuster 42 Pushing Lever 43 Fig 18 Disassembly and reassembly of the driving section a Disassembly Continuously turn the Adjuster 42 in the direction in which the nail is raised when adjusting the driving depth refer to ADJUSTING THE NAILING DEPTH on page 21 in the Instruction Manual so that Pushing Lever A 43 can be removed Remove the Hex Socket Hd Bolt M5 x 20 51 with the hex bar wrench 4 mm and remove the two Hex Socket Hd Bolt W Sp Washer M5 x 25 72 with the hex bar wrench 5 mm Now the Blade Guide 74 Guide Plate A 75 Guide Plate B 73 Pushing Lever B 40 etc can be removed Remove the two Ratchet Springs 41 from the Adjuster 42 with the small flat blade screwdriver being very careful not to lose them Now the Adjuster 42 can be removed from Pushing Lever B 40 95 Pull out Roll Pin 04 x 14 80 with the roll pin puller 4 mm 157 dia so that Guide Plate 75 and Guide Plate B 73 can be disassembled Pull out the Roll Pin D3 x 20 77 wit
7. 385 mm x 355 mm x 120 mm 15 5 32 x 14 125 128 x 4 23 32 Standard accessories Safety glasses Code No 885549 Case Code No 885676 Nose cap mounted on tool Code No 881751 Optional accessories 1 oz oil feeder Code No 877153 4 Oz feeder Code No 872042 1 oz oil feeder Code No 876212 500 g 1 1 Ibs Code No 3179 Pneumatic tool lubricant Pneumatic tool lubricant Pneumatic tool lubricant Grease ATTOLUB No 2 wm 8 5 2 Nail Selection The Model NT 65M2 utilizes small head T shaped nails finish nails collated by adhesive Applicable nails shown below CAUTION Ensure that nails are as specified in Fig 1 Other nails will cause clogging of nails and subsequent damage to the nailer 16 gauge finish Minimum Maximum 2 8 mm 0 110 F3 amp E E 0 054 Fig 1 Dimensions of nails 5 3 Explanation of the Nailing Action To meet the requirements of ANSI SNT 101 2002 the Model NT 65 2 is equipped with nailing operation switching device at the valve portion as shown in the figures below Use SINGLE ACTUATION MECHANISM SINGLE SEQUENTIAL ACTUATION MECHANISM or CONTACT ACTUATION MECHANISM in accordance with the work to be performed Each nailing operation is as follows O SINGLE ACTUATION MECHANISM SINGLE SEQUENTIAL ACTUATION MECHANISM First press the pushing lever
8. is pushed upward the compressed air in the valve Pushing Lever A 43 piston lower chamber is discharged from the Nail bottom of the Plunger 67 As a result the portion Fig 4 compressed air in the accumulator pushes down the Valve Piston 63 blocking the air supply vent and opening the exhaust valve 2 When the exhaust valve opens the compressed To the head valve chamber air in the head valve chamber is discharged into Air supply vent the atmosphere through the air passage 3 When the air pressure on the bottom surface of Air passage Head Valve A 10 overcomes the strength of the Head Valve Spring 8 Head Valve A 10 is pushed upward At this time Head Valve A 10 Exhaust valve seals with the Exhaust Cover 5 blocking the passage to the exhaust vent 4 When Head Valve A 10 goes up the Valve piston Control valve section Valve piston compressed air in the accumulator flows rapidly into the Cylinder 13 forcing the Piston 12 Plunger 67 downward to strike the nail When the Piston 12 Fig 5 Control valve section passes the cylinder hole the compressed air flows 9 into the return air chamber is accumulated there 10 3 During return See Fig 6 and Fig 7 1 When either Pushing Lever A 43 or Trigger C Head Valve Spring 8 Ass y 36 is released the Plunger 67 goes down and the compressed air in th
9. m oll Pin Nail Rail 90 Pin f i e Ribbon Spring 7915 Nail Feeder 94 gp Hex Socket Hd Bolt W Sp Washer M5 x 12 82 i Hex Socket Magazine A 81 Bolt 16 100 e Retaining Ring E type for D3 Shaft 83 Hex Socket Hd Bolt W Sp Washer M4 x 14 101 Fig 20 Disassembly and reassembly of the magazine section a Disassembly Remove the Hex Socket Hd Bolt W Sp Washer 5 x 12 82 with the hex bar wrench M5 Remove the Nylock Hex Socket Flat Hd Bolt M4 x 6 95 and the two Nylock Hex Socket Flat Hd Bolts x 10 96 with the hex bar wrench Then the Nail Feeder 94 Magazine Cover 71 and Cover Plate 70 can be removed Ensure that the nail feeder is not pulled during the above operation Remove the retaining ring for D3 shaft with the blade of a screwdriver Then the ribbon spring can be removed Pull out the Roll pin D2 5 x 12 98 with the roll pin puller 3 mm 118 dia and remove the Hex Socket Hd Bolt x 16 100 with the hex bar wrench Then the Magazine Protector 99 Sleeve 88 and nail rail can be removed Remove the Hex Socket Hd Bolt W Sp Washer M4 x 14 101 with the hex bar wrench Then Magazine A 81 Magazine B 92 and Spacer 93 can be removed b Reassembly Disassembly procedures should be followed in the reverse order Note the following points
10. Cover Exhaust Cover Gasket Head Valve Spring O ring Head Valve A Pushing Lever B Pushing Lever Spring Adjuster Pushing Lever A Piston O ring Trigger C Ass y Pushing Lever Guide Valve Bushing B Valve Piston Plunger Spring Plunger A Valve Bushing A Feed Piston O ring O ring x 6 Adjustment Cylinder Body Valve Guide Plate B Guide Plate A Blade Guide Magazine A Magazine B Magazine Cover Nail Feeder Nail Rail Cylinder Cylinder Plate O ring x 2 Piston Bumper Bumper Sheet Cylinder Ring Body Ass y 29 LIST NO E032 Hitachi Power Tools PNEUMATIC TOOL PARTS LIST FINISH NAILER 2005 11 15 1 65 2 d 4 9 P gt 8 O Z lt 8 S gt ots K eS z Ge amp 2 OW Sep oz Oy 00000 O EE 5 NT 65M2 CODE NO DESCRIPTION REMARKS 949 657 SOCKET HD BOLT 6 12 10 PCS 880 515 PLATE 885 673 COVER 885 637 HEX SOCKET HD BOLT W SP WASHER M5X25 885 671 EXHAUST COVER 885 672 GASKET 882 914 HEAD BUMPER 882 913 HEAD VALVE SPRING 883 992 O RING I D 20 8 882 927 HEAD VALVE A 885 668 ID 31 7 885 667 885 663 CYLINDER 885 690 O RING 5 44 885 665 O RING ID 59 6 885 664 CYLINDER P
11. The Cylinder O ring 1 0 59 6 15 is abnormal broken or damaged The seal surface of the Body Ass y 31 is abnormal C portion The Piston Bumper 18 is abnormal d or 8 portion is damaged deformed or cracked e The Piston 12 is abnormal driver blade or sealed face is deformed The surface of the Body Ass y 31 is deformed D Air outlet valve bushing The Valve Packing 20 is damaged The O ring 1AP 3 24 of the Plunger 22 is abnormal worn broken or damaged Q The O ring S3 23 of the Plunger 22 is abnormal worn broken or damaged The screw of the Valve Bushing 26 is loose E Control valve 1 The O ring 1AP 10 64 of the Valve Piston 63 is abnormal worn broken or flawed G The lower O ring P 7 62 of the Valve Piston 63 is abnormal worn broken or flawed The O ring P 18 61 of Valve Bushing B 60 is abnormal broken or flawed x The internal surface 0 of the valve cavity of the Body Ass y 31 is abnormal The upper O ring P 7 62 of the Valve Piston 63 is abnormal worn broken or flawed The Feed Piston O ring LD 14 59 of Valve Bushing B 60 is abnormal broken or flawed The internal surface f of the valve cavity of the Body Ass y 31 is abnormal F Control valve 2 The O ring 1 8 66 of the Plunger 67 is abnormal worn broken or flawed Valve Bus
12. Use specified nails Remove the abnormal nails and load the magazine with normal nails Magazine Nail groove of the magazine is abnormal too wide too narrow deformed or damaged e Magazines A and B are abnormal deformed or damaged e Nail feeder is abnormal deformed or damaged Ribbon sping is abnormal deformed or damaged Magazine cover is abnormal deformed damaged or fatigued Check the nail feeding section for abnormal conditions burrs fatigued deformed or damaged Check if the nail feeder operates smoothly in the magazine e Check if nails one strip move smoothly in the magazine Repair or replace the defective part Remove the adhesive fragments and apply oil to the nail feeder ribbon spring and the nail rail Blade guide Nail inlet groove of the blade guide is abnormal deformed burrs or damaged e Adhesive fragments are in the nail inlet groove Check if nails one strip are fed smoothly into the nail injection port of the blade guide e Repair or replace the defective part e Remove the adhesive fragments 13 Problem Possible cause Inspection method Remedy Output section Air pressure is too low Piston O ring is worn or damaged e Piston bumper is abnormal dislocated deformed or damaged e Cylinder ring is abnormal dislocated deformed or
13. as shown in Fig 10 To grind with a grinder gradually grind the tip while cooling the ground area with water to prevent it from being excessively heated Excessive grinding will rapidly reduce the service life of the driver blade Driver blade Fig 10 16 9 3 Possible Causes and Correction of Air Leakage Air leakage repair locatoin Repair procedure 1 Check the points of the following parts marked by an asterisk for abnormal condition 2 Next check the seal parts marked with a double circle 9 for wear flaw and damage 3 Then check other places Air leakage point Possible cause When control valve OFF When control valve ON A Exhaust port Head Valve 10 and Cylinder 13 are abnormal sealing surface b is worn or deformed The O ring 1 0 20 8 9 is abnormal worn deformed or damaged Head Valve 10 is abnormal worn deformed or damaged Head Valve 10 is abnormal portion is worn deformed or broken The Exhaust Cover 5 is abnormal 8 portion is deformed or clogged with dust B Exhaust cover The Hex Socket Hd Bolt W Sp Washer M5 x 25 4 is loose Gasket 6 is damaged The seal surface of the Body Ass y 31 or the Exhaust Cover 5 is abnormal Air leakage point Possible cause When control valve OFF When control valve ON C Blade guide
14. damaged e Driver blade is abnormal deformed burrs damaged or fatigued e Cylinder s internal surface is abnormal deposits of dirt or worn e Head valve sliding surface is abnormal galled damaged or needs oil e Head valve spring is abnormal fatigued or damaged Pull the nail feeder backward and perform idle driving Check if the driver blade has returned e Check if nails can be driven at 5 kgf cm While operating the nailer without nails check if the driving operation is performed After operating the nailer without nails check if the driver blade is kept in the down position Adjust for 5 to 8 5 kgf cm 70 120 psi Replace the piston O ring Replace the piston bumper e Reassemble or replace Repair or replace Remove the dirt and apply oil or replace Replace the defective part Apply grease Control valve section Plunger valve piston valve bushing A or valve bushing B is abnormal galled or damaged e O ring is worn or oiling is needed e After making idle driving check if the driver blade is kept in the down position e Disassemble the control valve and check the O ring Replace the defective part Apply grease or replace 2 Nails are bent when being driven e For short nails the adjuster is raised too high e Nails are not fully fed into the injection port e Unspecified nails ar
15. follow warnings could result in DEATH or SERIOUS INJURY Operators and others in work area MUST wear safety glasses with side shields fingers AWAY from trigger when not driving fasteners to avoid accidental firing Choice of triggering method is important Check manual for triggering options NEVER point tool at yourself or others in work area DISCONNECT AIR before servicing unjamming or when not in use NEVER use oxygen or other bottled gasses Explosion may occur 00 NOT EXCEED 120psi 8 3bar C331826D 7 3 Related Laws and Regulations As nailers and staplers are designed to instantaneously drive nails and staples there is an ever present danger of misfiring and subsequent possible serious injury Accordingly close attention in handling is absolutely necessary at all times Carefully ensure that the customer is fully aware of the precautions listed in the Handling Instructions provided with each unit While there are no specific safety regulations there are related items in various general safety regulations with which the salespersons should be familiar in order to properly advise the customer Please check your national and or local regulations for applicable items Some applicable items are outlined below The U S A OSHA 1926 102 Eye and face protection 1926 302 Power operated hand tools ANSI SNT 101 2002 Portable Compressed Air Actuated Fastener Driving Tools Safety Requirement
16. 07 11 INSPECTION AND CONFIRMATION AFTER REASSEMBLY Check that the Nail Feeder 94 slides smoothly Check that Plunger 67 moves smoothly Check that Adjuster 42 turns smoothly Check that there is no air leakage from each part Set Change Knob C 58 to contact actuation see 5 2 While driving nails with an air pressure of 5 kgf cm 71 psi check that there is no misfiring and bending of nails NOTE Before conducting the driving test turn the Adjuster 42 to the deepest position Set Change Knob C 58 to single actuation single sequential actuation see 5 2 Check that the Model NT 65 2 operates by pressing Pushing Lever 43 against a test piece first then pulling Trigger C Ass y 36 Check that the Piston 12 is still showing from the Blade Guide 74 tip outlet of nails after Pushing Lever A 43 is released from the test piece with Trigger C Ass y 36 pulled Recheck the tightening torque of each screw Check that Pushing Lever A 43 slides smoothly Check that the machine will not operate only by pulling Trigger C Ass y 36 Also check that the machine will not operate only by depressing Pushing Lever A 43 28 12 STANDARD REPAIR TIME UNIT SCHEDULES MODEL Variable Fixed 10 20 30 40 50 60 min General Assembly Work Flow Knob Plunger O ring x 3 Valve Bushing Top
17. 2 2 MARKETING OBJECTIVE The new Model NT 65M2 finish nailer is a minor changed version of the current Model NT 65M To expand the market share the Model NT 65 2 is shifted from OEM to manufacturing by ourselves In addition the appearance is changed to the one for a next generation model Model NR 90AD 3 APPLICATIONS Finish nailing of door casings and similar frame assemblies Fastening of drawer bottoms and similar assembly work in the construction of various cabinets and cases 4 SELLING POINTS New aggressive appearance Capable of cleaning chips and saw dust of course it drives nails thanks to the 360 adjustable exhaust ML blow nozzle Comfortable grip Lightweight only 1 7 kg 3 7 165 and good balance Tool less depth adjustment With single actuation contact actuation selector Easy to use clogged nail release mechanism 5 SPECIFICATIONS 5 1 Specifications Model NT 65M2 Driving system Reciprocating piston type Operating pressure 5 8 5 kgf cm gauge pressure 70 to 120 psi Product weight 1 7 kg 3 7 lbs Dimensions L x H x W 295 mm x 285 mm x 71 mm 11 5 8 x 11 7 32 x 2 51 64 Nail feed system Ribbon spring Loadable number of nails 100 nails Packing Corrugated cardboard box Packing dimensions L x H x W
18. 32 949 866 ROLL PIN D3X30 10 PCS 959 155 5 BALL D3 97 10 PCS 982 454 SPRING 885 658 CHANGE KNOB 877 763 FEED PISTON O RING 1 0 14 884 963 VALVE BUSHING 873 570 O RING P 18 676 531 O RING 7 884 964 VALVE PISTON 872 654 O RING 1AP 10 884 966 PLUNGER SPRING 878 888 O RING ID 1 8 884 965 PLUNGER 884 962 VALVE BUSHING 876 465 NYLON NUT 885 646 COVER PLATE 885 648 MAGAZINE COVER 885 637 HEX SOCKET HD BOLT W SP WASHER M5X25 885 635 GUIDE PLATE B 885 636 BLADE GUIDE 885 634 GUIDE PLATE A 884 323 LOCK LEVER 949 685 ROLL PIN D3X20 10 PCS 885 656 885 655 RIBBON SPRING 949 770 ROLL PIN D4X14 10 PCS 885 641 MAGAZINE A 885 652 HEX SOCKET HD BOLT W SP WASHER M5X12 872 971 RETAINING RING E TYPE FOR D3 SHAFT 877 371 NYLON NUT M5 885 659 HANDLE ARM 949 812 HEX SOCKET HD BOLT M4X10 10 PCS LABEL 885 649 SLEEVE 885 643 RAIL 885 660 ARM PLATE 885 642 MAGAZINE 885 644 SPACER 885 654 FEEDER 885 651 NYLOCK HEX SOCKET FLAT HD BOLT M4X6 885 650 NYLOCK HEX SOCKET FLAT HD BOLT 10 LABEL A 878 791 ROLL PIN D2 5X12 885 645 MAGAZINE PROTECTOR 949 754 SOCKET HD BOLT M4X16 10 PCS 885 653 HEX SOCKET HD BOLT W SP WASHER 4 14
19. 8 MECHANISM AND OPERATION PRINCIPLE u u 8 8 1 MECHANISM asista eta o at a oa ia o iai 8 8 2 Operation Principle e ste sa ce aaa a iat atace i al nea a 10 9 TROUBLESHOOTING GUIDE aaa anca ana aaa di i 13 9 1 Troubleshooting and Correction 13 9 2 Regrinding the Driver Blade rente t pex CRX Rut 16 9 3 Possible Causes and Countermeasures for Air Leakage 17 10 DISASSEMBLY AND REASSEMBLY I UI nnn uu anna 19 10 1 General Precautions in Disassembly and Reassembly 19 10 2 Disassembly and Reassembly of the Output Section nenea nana nana ana 20 10 3 Disassembly and Reassembly of the Control Valve Section 22 10 4 Disassembly and Reassembly of the Driving Section 25 10 5 Disassembly and Reassembly of the Cap and the Magazine Section 26 11 INSPECTION AND CONFIRMATION AFTER REASSEMBLY 28 12 STANDARD REPAIR TIME UNIT SCHEDULES 29 Assembly Diagram for NT 65M2 1 PRODUCT NAME Hitachi Finish Nailer Model NT 65M
20. D3 x 25 53 and 03 x 32 54 with the roll pin puller 3 mm dia and take out the control valve in the following manner 1 Remove the Exhaust Cover 5 by following the procedure in 1 item 10 2 2 As shown in Fig 16 put in the 4 to 5 mm 0 157 to 0 197 dia bar from the upper side of the Body Ass y 31 and push the top of the Valve Piston 63 Now the parts forming the control valve can be taken out except Valve Bushing B 60 CAUTION Be careful not to damage the Valve Piston 63 Valve Bushing A 68 Valve Bushing B 60 etc Do not pul out the end of the Plunger 67 with the pliers 3 To take out Valve Bushing B 60 put a 1 5 to 3 mm 0 059 to 0 118 dia wire with its end hooked into the hole in the bushing and pull it out while being careful not to damage the internal surface of Valve Bushing B 60 as shown in Fig 16 b Reassembly Disassembly procedures should be followed in the reverse order Note the following points Be extremely careful to prevent the entry of foreign particles into the control valve section Thoroughly apply grease to the O Rings 1 8 66 of the Plunger 67 the O Rings P 7 62 and 1AP 10 64 of the Valve Piston 63 e First align the roll pin groove of Valve Bushing A 68 with that of Valve Bushing B 60 and reassemble the entire control valve unit as shown in Fig 17 Then install the control valve unit so that the roll pin groove
21. IM SNOSIHVdIWOO 9 7 PRECAUTIONS SALES PROMOTION In the interest of promoting the safest and most efficient use of the Model NT 65M2 Nailer by all of our customers itis very important that at the time of sale the salesperson carefully ensures that the buyer seriously recognizes the importance of the contents of the Handling Instructions and fully understands the meaning of the precautions listed on the Warning Label attached to each tool 7 1 Handling Instructions Although every effort is made in each step of design manufacture and inspection to provide protection against safety hazards the dangers inherent in the use of any pneumatic tool cannot be completely eliminated Accordingly general precautions and suggestions for use of pneumatic tools and specific precautions and suggestions for the use of the pneumatic nailer are listed in the Handling Instructions to enhance the safe efficient use of the tool by the customer Salespersons must be thoroughly familiar with the contents of the Handling Instructions to be able to offer appropriate guidance to the customers during sales promotion 7 2 Warning Label Each Model NT 65M2 unit is provided with a Warning Label illustrated below which lists basic safety precautions in its use Carefully ensure that customers fully understand and follow these precautions before using the tool DANGER rd 77 W Read and understand tool labels and manual Failure to
22. LATE 885 666 CYLINDER RING 885 669 PISTON BUMPER 885 670 BUMPER SHEET 884 338 PACKING 881 900 SPRING 884 333 PLUNGER 881 715 O RING S3 873 093 O RING 1AP 3 987 105 O RING 5 10 882 701 BUSHING 968 643 RETAINING RING E TYPE FOR D4 SHAFT 884 334 CAUTION PLATE 955 479 RETAINING RING E TYPE FOR D6 SHAFT 885 662 BODY ASS Y NAME PLATE NAME PLATE B 885 675 PROTECTOR 885 689 TRIGGER ARM 885 657 _ TRIGGER C ASS Y 881 951 ROLL PIN D2 5X16 885 640 PUSHING LEVER GUIDE 885 638 PUSHING LEVER SPRING 885 639 PUSHING LEVER B 881 765 SPRING 884 325 ADJUSTER 885 688 PUSHING LEVER A 881 751 NOSE CAP A GRIP RUBBER A 884 342 GASKET 885 674 A AIR PLUG NPT 1 4 949 821 SOCKET HD BOLT 5 16 10 PCS 885 661 WASHER 949 757 SOCKET HD BOLT M5X20 10 PCS 2 ALTERNATIVE PARTS 11 05 B INCLUD 45 INCLUD 35 37 SUPPLIED WITH ITEM NO 601 602 1 1 4 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 3 1 PARTS NT 65M2 CODE NO DESCRIPTION REMARKS HITACHI LABEL 949 539 ROLL PIN D3X25 10 PCS 884 975 ROLL PIN D3X
23. Plunger 67 returns lowers completely as shown in Fig 9 Thus the Piston 12 returns raises fully Accordingly continuous nailing can be accomplished by pushing only Pushing Lever B 40 up and down while holding Trigger C Ass y 36 depressed Plunger 67 Accumulator esee lees 1 e e w e Valve Piston 63 Plunger 67 Trigger C Ass y 36 Valve piston lower chamber Switching device Change Knob C 58 Upward position Fig 8 Single actuation mechanism Accumulator 5 ey ecc eoo ele eje Valve Piston 63 Trigger C Ass y 36 Valve portion lower chamber Pushing Lever B 40 Switching device Change Knob C 58 Downward position Fig 9 Contact actuation mechanism 42 3 9 TROUBLESHOOTING GUIDE 9 1 Troubleshooting and Correction Problem Possible cause Inspection method Remedy 1 Nails cannot be driven Nails Magazine is not loaded with specified genuine nails Magazine is loaded with abnormal nails bent nails large or small head nails abnormal collation etc Collating band is abnormally adhesive Check if the magazine is normally loaded with specified nails
24. aft 30 with the blade of a screwdriver and pull out Change Knob C 58 being careful not to lose the Steel Ball D3 97 56 and Spring C b7 Then pull out the Roll Pin D3 x 32 54 with the roll pin puller 3 mm dia remove the Pushing Lever Guide 38 and Trigger C Ass y 36 can be removed Carefully disassemble so as not to lose these parts Retaining Ring E type for D6 Shaft 30 d 2 p dd Feed Piston O ring I D 14 59 v Pin D3 x 25 53 Valve Bushing B 60 Sj Roll Pin D3 x 32 54 O ring P 18 61 Steel Ball 7 62 SS 203 97 56 g t Spring C 57 Valve Piston 63 6 Knob 7 58 0 ring P 7 62 Roll Pin O ring 1 10 64 D3 x 30 55 Plunger Spring 65 Su Roll Pin D2 5 x 16 37 O ring 1 0 1 8 66 Plunger 67 O ring I D 1 8 66 Valve Bushing A 68 Trigger Arm C 35 Trigger Ass y 36 Pushing Lever 4i Guide 38 Fig 14 Disassembly and reassembly of the control valve section 22 When disassembling do not pull out this part by gripping it with the pliers Plunger 67 Be careful not to damage the internal surface Wire with 1 5 mm to 3 mm 0 059 to 0 118 dia Fig 16 23 Valve Bushing 68 Pull out the Roll Pins
25. against the wood next pull the trigger to drive the nail First pull the trigger next press the pushing lever against the wood to drive the nail After nailing once nailing will not be possible again until the trigger is released and pressed again O CONTACT ACTUATION MECHANISM First press the pushing lever against the wood next pull the trigger to drive the nail First pull the trigger next press the pushing lever against the wood to drive the nail If the trigger is held back a nail will be driven each time the pushing lever is pressed against the wood Nailing operation switching device Sr CI Switching device Change knob 2 10 Switching device NL d Change knob SINGLE ACTUATION MECHANISM Switching device upward position CONTACT ACTUATION MECHANISM Switching device downward position 5 4 Nail Driving Force Figure 2 shows the nailer output energy provided by the supply pressure and the required nailing energy for driving the nail flush with surface of a workpiece with variables of types of wood and nails Air pressure which exceeds the intersecting point between the nailer output energy and the required nailing energy for driving the nail allows the nail to be fully driven For example when driving a 65 mm 2 1 2 nail into a hard wood workpiece with the Model NT 65 2 a pressure of about 5 5 kgf cm 78 psi 5 4 bar allows the nailer to drive the nail flush w
26. ails clog the Unspecified nails used Check if the nails are Use specified nails mechanism specified ones Improper nail feed gt Check if they move See Magazine in item 1 smoothly after putting nails See Magazine in item 1 and check if the nail feeder operates smoothly Driver blade worn Check if the driver blade tip Replace the part is worn The driver blade has not Perform idle driving or See Output section in returned completely gt actually drive with nails and item 1 check if the driver blade has See Output section returned completely item 1 5 Single x O ring in plunger is worn Disassemble the control Replace the part actuation valve section and check the mechanism is O ring in valve piston is O ring of the plunger and Replace the part not possible worn the valve piston Abnormal plunger sliding surface of valve piston seized or deformed Abnormal plunger trigger arm C push lever B and or body worn or damaged The position of a switching device is mistaken Check each part for abnormalities worn deformed or damaged The position of a switching device is checked Replace the part Replace the abnormal parts switching device is set to the correct position 15 9 2 Regrinding the Driver Blade The tip of the driver blade should be ground
27. e accumulator flows into the valve piston lower chamber Head Valve A 10 2 As the air pressure in the valve piston lower chamber increases to overcome the air pressure Accumulator applied on the upper portion of the Valve Piston Cylinder hole 63 the Valve Piston 63 is forced upward Cylinder 13 When this occurs the exhaust valve is closed and Piston 12 the air supply vent is opened Return air 3 When the air supply vent opens the compressed chamber air in the accumulator portion passes through the air passage and flows into the head Piston valve chamber to push down Head Valve A 10 As a result Head Valve 10 and the Cylinder 13 are sealed and at the same time Head Valve A 10 and the Exhaust Cover 5 separate to open the exhaust vent 4 The compressed air above the Piston 12 is discharged into the atmosphere through the exhaust vent In this way the air pressure above Toe mambar the Piston 12 is reduced and the greater Accumulator pressure of the air accumulated in the return air chamber pushes the Piston 12 upward 5 If the air pressure below the Piston 12 is higher Exhaust valve than that of the atmosphere after the Piston 12 has fully returned the excess air pressure is discharged into the atmosphere through the Plunger 67 clearance between the Piston Bumper 18 and the Fig 7 Control valve section driver blade zx 4 S
28. e used e Driver blade is worn e Workpiece is very hard Check if the adjuster is raised too high See item 1 Check if the driver blade tip is abnormally worn e Drive a nail into soft wood workpiece and check if the nail is bent Turn the adjuster to the lower position to decerase the pressure See item 1 Replace the driver blade Do not use unspecified workpiece Problem Possible cause Inspection method Remedy 3 Head of a nail driven into a workpiece protrudes from the wood surface Adjuster is improperly adjusted Air pressure is too low Workpiece is very hard Driver blade is worn Piston O ring is abnormal worn or damaged e Cylinder s internal surface is abnormal worn or rough Turn the adjuster to the lowest position and drive a nail Drive a nail into soft wood workpiece and check if the head protrudes from the nose tip Operate the nailer without nails and check if the driver blade is projected from the nose cap Disassemble the output section and check the piston O ring and the inner outer surfaces of the cylinder for abnormal condition Check if the nails are lowest position and drive a nail Adjust for 5 to 8 5 kgf cm 70 120 psi Do not use unspecified workpieces Replace the driver blade Replace the defective part 4 N
29. h the roll pin puller 3 mm 118 dia so that the Lock Lever 76 and the Pushing Lever Guide 38 can be removed b Reassembly Disassembly procedures should be followed in ther reverse order and tighten the two Hex Socket Hd Bolts W Sp Washer M5 x 25 72 after making the Blade Guide 74 Guide Plate A 75 and Guide Plate B 73 flush with the Body Ass y 31 After assembly check that Pushing Lever A 43 Pushing Lever B 40 and the Adjuster 42 move smoothly 10 5 Disassembly and Reassembly of the Cap and the Magazine Section 1 Disassembly and reassembly of the cap See Fig 19 Tool required Hex bar wrench 4 mm Gap A 47 Hex Socket Hd Bolt M5 x 16 49 Gasket B 46 Body Ass y 81 Fig 19 Disassembly and reassembly of the cap a Disassembly e Remove the three Hex Socket Hd Bolts M5 x 16 49 with the hex bar wrench 4 mm so that Cap A 47 and Gasket B 46 can be removed b Reassembly Diassembly procedures should be followed in the reverse order 26 2 Diassembly and reassembly of the magazine section See Fig 20 Magazine Cover 71 Body N Nylon Nut M4 69 ylon Nut y Assy 31 Ma 69 Cover Plate Nylon Nut M4 1691 Sleeve Magazine B 92 Spacer 93 Nylock Hex Socket Flat Hd Bolt M4 x 6 Magazine Protector E 22 SC Ce fax Socket Flat gt 7 Bolt M4 x 10 96
30. hing A 68 is abnormal sliding surface of the Plunger 67 is deformed or flawed The upper O ring 1 8 66 of the Plunger 67 is abnormal worn broken or flawed The Valve Piston 63 is abnormal sliding surface of the Plunger 67 is deformed or flawed G Gap A Gasket B 46 is damaged The Hex Socket Hd Bolt M5 x 16 49 is loose The seal surface of the Body Ass y 31 is abnormal broken deformed or scratched 18 10 DISASSEMBLY REASSEMBLY The items particularly necessary for disassembly and reassembly are described below The Bold numbers in the descriptions below correspond to the item numbers in the Parts List and exploded assembly diagram CAUTION Before disassembly or reassembly be sure to disconnect the air hose from the nailer with your finger released from the trigger to exhaust all the compressed air and remove all nails 10 1 General Precautions in Disassembly and Reassembly Apply grease ATTOLUB No 2 Code No 317918 to the O rings and O rings sliding portions When installing the O rings be careful not to damage the O rings and prevent dirt entry Oil required Hitachi pneumatic tool lubricant 30 cc 1 oz oil feeder Code No 877153 120 cc 4 oz oil feeder Code No 874042 1 Itr 1 quart can Code No 876212 f the Gasket 6 is damaged replace it and check that no air is leaking Be especially careful to preve
31. ingle actuation mechanism contact actuation mechanism Fig 8 and Fig 9 Single contact actuation mechanism changeover is accomplished by turning the switching device Change Knob C 58 Single actuation mechanism Switching device upward position 1 Immediately after driving the first nail the control valve should be as shown in Fig 7 2 When only Pushing Lever B 40 is released and Trigger C Ass y 36 is held as shown in Fig 8 the plate of Trigger C Ass y 36 contacts Change Knob C 58 and the Plunger 67 returns lowers only halfway Because of this compressed air does not flow into the valve piston lower chamber and Valve Piston 63 remains in the lowered position Accordingly the Piston 12 remains in the lowered position as shown in Fig 6 3 When Trigger C Ass y 36 is released the Plunger 67 returns lowers completely as shown in Fig 5 Compressed air then flows into the valve piston lower chamber and the Valve Piston 63 is forced upward The Piston 12 then returns fully upward Therefore unless Trigger C Ass y 36 is released after each nailing operation the structural mechanism prevents the next nailing operation Contact actuation mechanism Switching device downward position 1 Immediately after the first nail is driven the control valve should be as shown in Fig 7 2 Even when only Pushing Lever B 40 is released and Trigger C Ass y 36 is held the
32. ith the surface A pressure beyond this value causes the nail head to be driven below the wood surface Figure 2 should be used as a reference only because those values vary depending on the type of wood moisture content and grain of wood H ft Ib HI ftib 60 P 1 x 1 60 NM 2m iuste n m dou edu Lg m DD NA E s Q I 50 Gd s 247 50 Ww 74 Ronda d oW c 1 NT 65M gt Hardwood i NTI65M2 S 1 n 5 40 306 lt 7 pes torso peas rore H D i t o e EC SE yg i t iP oj i S 5 30 gt Z ili 89 p pe sx c fuum 22 Jo M M EIN d E uses a 5 LO De 3 3 20 20 s dg nde Se tote 10 l 10 C que us o o T ERIT E Dn 9 o4 0 10 0 12 0 14 0 16 0 18 9 d 70 80 90 100 110 120 ps o 867 00 _ 120 AS 6 7 8 8 Sigin Nail dXL 5 6 7 8 bar emm 5 N Air pressure setting of NT 65 2 to drive nail flush gc e E L E E E E eo Ye e Fig 2 Required nailing energy and nailer output energy 69 L 99 61 ulZ L 2 v 69 L 9 uZ l 2 L DUT eo 91
33. nt the entry of foreign particles into the control valve section Use the conventional grip tape for repair of Grip Rubber A 45 because Grip Rubber A 45 cannot be mounted without the specifically designed jig Tightening torque for each part Bolt and screw Tightening torque N m kgf cm Hex Socket Hd Bolt M6 x 12 1 9 8 0 8 100 8 7 2 0 6 Hex Socket Hd Bolt M5 4 49 51 72 82 8 3 0 5 85 5 6 1 0 4 Hex Socket Hd Bolt 86 100 101 4 4 0 3 45 3 32 50 2 Hex Socket Flat Hd Bolt 95 96 1 9 0 3 20 8 1 5 0 2 19 10 2 Disassembly and Reassembly of the Output Section 1 Disassembly and reassembly of the Exhaust Cover 5 Head Valve 10 Cylinder 13 Piston 12 Piston Bumper 18 etc See Fig 11 Tool required Hex bar wrenches 5 mm and 4 mm a Disassembly Remove the four Hex Socket Hd Bolts W Sp Washer 5 x 25 4 with a hex bar wrench 4 mm and remove the Exhaust Cover 5 Then the components of the output section such as the Cylinder 13 Piston 12 Piston Bumper 18 with the Bumper Sheet 19 assembled etc be removed Remove the Hex Socket Hd Bolt M6 x 12 1 with a hex bar wrench 5 mm The Plate 2 and the Top
34. ring 20 8 9 to Head Valve A 10 Fig 12 then mount it to the Exhaust Cover 5 2 Disassembly and reassembly of the Valve Bushing 26 Plunger 22 etc See Fig 13 Tools required Socket wrench 14 mm Flat blade screwdriver a Disassembly Remove the Valve Bushing 26 with a socket wrench 14 mm The Valve Packing 20 and the Spring 21 can now be removed Remove the Knob 28 and the Retaining Ring E type for 04 Shaft 27 then the Plunger 22 can be removed from the Valve Bushing 26 b Reassembly Disassembly procedures should be followed in the reverse order Note the following points Apply grease to the O ring 1AP 3 24 O ring S3 23 and the O ring S 10 25 Mount the Retaining Ring E type for D4 Shaft 27 to the Plunger 22 then press the Knob 28 against the Retaining Ring E type for D4 Shaft 27 to mount it Knob 28 O ring S 10 25 Retaining Ring E type O ring 53 23 RN for D4 Shaft 27 O ring 1AP 3 Bushing 26 gt Exhaust Cover 5 Plunger 22 Spring 21 Valve Packing 20 Fig 13 Disassembly and reassembly of the valve bushing plunger etc 10 3 Disassembly and Reassembly of the Control Valve Section See Fig 14 Tools required Flat blade screwdriver Roll pin puller 3 mm 0 118 dia a Disassembly Remove the Retaining Ring E type for D6 Sh
35. s for 8 MECHANISM AND OPERATION PRINCIPLE 8 1 Mechanism As illustrated in Fig 3 the Model NT 65M2 be generally divided into four sections output section control valve section driving section and magazine section 1 Output section 1 The body and the exhaust cover are made of aluminum and their thickness is reduced for weight saving 2 The internal structure of the exhaust cover is common to the Model NT 65MA2 3 The air duster section is common to the Model NT 65MA2 2 Control section Common to the Model NR 90AD 3 Driving section Most of parts have been newly designed 1 The adjuster is common to the model NT 65MA2 2 Pushing lever is the same as the Model NT 65MA2 4 Magazine section Most of parts have been newly designed 1 The top loading magazine is the same as the Model NT 65M 2 The nail feeding structure is similar to the Model NT 65M Blow nozzle section Control valve section Valve Piston 63 O ring S 10 25 ring 1AP 3 24 Valve Bushing B 60 Plunger Spring 65 Va Packing 20 O ring S 3 23 Output section Driving section Valve Bushing A 68 Plunger 67 Trigger C Ass y 36 Switching device Change Knob C 58 Pushing Lever Guide 38 Spring 21 Pushing Lever B 40
36. s in the control valve unit will be aligned with the roll pin holes in the Body Ass y 31 First insert the roll pin puller 8 mm dia into the roll pin holes Then upon confirming that the puller passes through the hole drive in the Roll Pins D3 x 25 53 and D3 x 32 54 If an attempt is made to drive the roll pin with force when the roll pin grooves in Valve Bushings A 68 and B 60 are not aligned with the roll pin holes in the Body Ass y 31 it will damage the periphery of Valve Bushings A 68 and B 60 and prevent disassembly or reassembly Roll pin groove in Valve Bushing A Align Roll pin groove in Valve Bushing B 60 Body Ass y 31 Roll pin holes Roll Pin D3 x 25 53 Roll Pin D3 x 32 54 J lt Roll pin groove Fig 17 After assembly make sure that the Plunger 67 moves smoothly 24 10 4 Disassembly and Reassembly of the Driving Section See Fig 18 Tools required Hex bar wrenches 4 mm and 5 mm Roll pin pullers mm 118 dia and 4 mm 157 dia Flat blade screwdriver with small tip Nylon Nut M5 84 Handle Arm 85 N Hex Socket Hd Sg Bolt M4 x 10 86 6 Body Ass y 81 Washer 50 Qp Hex Socket Hd Bolt Blade Guide 74 5 x 20 51 Guide Plate B 73 age Arm Plate 91 Hex Socket Hd Bolt W Sp Washer 5 x 25 72 y Guide Plate 75

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