Service manual 3000 5000 7500 serie
Contents
1. Port end cover Inside diameter of ports Bearing carrier Inside diameter of ports Direction of flow thru internal passage or coring Gears Gear tooth width Gear O D measured over teeth If gears are integral describe drive end of drive gear as in Paragraph 3 above HOW TO ORDER PARTS ALWAYS GIVE US THE SERIES NUMBER please It instantly tells us what PERMCO Pump or Motor you want parts for You will find this Series Number on the nameplate IF YOU CANNOT SUPPLY THE SERIES NUMBER Please answer these questions Is the unit a pump or a hydraulic motor 1 2 If a pump which way does it rotate when you look at it from the shaft end Clockwise Or counter clockwise How many gear housing sections does the unit have Check Series Identification Table below to determine series STEPS IN IDENTIFICATION Shaft end cover Mounting flange Is it pad mounting or foot mounting How many bolts 2 4 6 8 If round flange measure pilot diameter center diameter and bolt hole diameters SERIES IDENTIFICATION CONTINENTAL INTEGRAL 5 ht amp Gear Set Shaft amp Gear x e el Continental Two Piece Drive Shaft amp Gear Set available on Series 3000 5000 and 7500 as specials consult factory 1 1200 10 10 9 16 6 os 6 1 2 2 4 PI 3 4 11 16 1 3 00 8 7 3100 Doweled coe 4 6 en 8 6 51002. 0574 23 5 8 11 Grade 8 Hex Nut W3 65 8 Check Valve Assembly L 0280 K 24 Bearing Carrier s 7 7 9 Continental Shaft 0024 25 Connecting Shaft YZ 0022 10 Spacer ZE 0558 26 Gear Set U 0996L 11 Snap Ring W86 137 28 Grade 8 Hex Head Cap Screw W1 14 Ring Seal VA 0558 1XS 15 Crowned Roller Bearing Q 0921 5000 SERIES PUMPS MOTORS 16 Teflon Coated Thrust Plate AZ 0947 Diverter Plate AZ 0947 DS 1 Snap Ring W023 283 Bi Rotational Diverter Plate AZ 0947 BRD 2 Outboard Bearing W58 47 17 Gasket Seal TA 2995 252 3 Double Lip Shaft Seal W62 26 17 18 Housing RZ 0577 4 Bearing Spacer UA 0558 1 19 Drive Shaft amp Gear Set 0024L 5 Seal Retainer ZB 0558 20 Port End Cover PEC XZ 0592 6 High Pressure Seal W62 49 8 21 5 8 Grade 8 Washers W033 2 7 Shaft End Cover SEC _0574 22 5 8 11 Grade 8 Threaded Rod ZD 0391 8 Check Valve Assembly L 0280 K 23 5 8 11 Grade 8 Hex Nut W3 65 9 Continental Shaft 0024 24 Bearing Carrier _0576 12 Pump Shaft Seal W62 26 17 25 Connecting Shaft ZA 0022 13 Motor Shaft Seal W62 49 8 26 Gear Set OZ 0995L 14 Ring Seal MA 0558 1XS 21 O Ring K 2995 164 15 Crowned Roller Bearing R 0921 28 Hex Head Cap Screw W1 7 gs Series With a sharp metal scribing tool grease pencil Magic Marker or paint make an indexing mark that runs straight across a surface of the port end cover 20 gear housing 18 and shaft end cover 7 This will enable you to reassemble
3. 5 3 Turn the shaft end cover into pilot down position to make diverter plate 16 accessible 4 Using a knife blade or thin blade screwdriver pry the diverter plate 16 very gently off the bearings of the shaft end cover 7 Bearings should remain in cover If they don t or can be removed by hand discard cover If working on another make of pump to be refitted with PERMCO diverter plates remove the pocket seals and throw away on PERMCO Pumps no pocket seals are required DISASSEMBLY 5 If you plan to replace the bearings use a bearing puller to pull the roller bearings 15 out of the shaft end cover If you do pull the bearings check the bores for out of round and elliptical shape If out of round is over 0 003 DO NOT RE USE 6 Examine ring seal 14 if worn replace Do this by pulling the drive gear bearing 7 Remove lip seal 3 if pump 6 if motor by inserting a curved tool between the seal and shaft end cover 7 Tap out seal and discard Disassembly of Type I C Continental Shaft End Cover The Type C unit has a separate shaft and gear set Disassembly will follow the same steps as described above Tap the drive shaft assembly out of the shaft end cover The shaft 9 must then be pressed out with the bearing 2 Bearing 2 will be removed from shaft 9 as follows For 3000 Series all C shafts 1 Remove snap ring 11 and spacer 10 from gear end of shaft
4. Drain and flush entire system Install new filter Fill system with fresh oil of proper grade or filter contaminated oil through a 10 micron filter before refilling Operate pump an hour Drain system again Install new filter element and fluid Drain and replace with anti foaming fluid of proper grade Check and reset relief valve pressure using pressure gauge Abrasive contaminants in fluid Fluid too light for pump service Sustained pressure above pump maximum rating TROUBLE SHOOTING REMEDY PROBLEM EXCESSIVE NOISE IN PUMP Replenish fluid to proper level with proper grade Drain system and refill with specified grade of fluid Clean or replace filter element Install larger suction line Clean line thoroughly Check pump maximum speed Slow down pump driver Or install larger pump Clean or replace breather on reservoir Drain system and refill with non foaming hydraulic fluid Replace with larger filter Realign flexible coupling between pump and driver Drip oil over suspected joint listen for change in sound of pump tighten joints Replace parts as necessary Drain system and refill to correct level with proper grade of anti foaming fluid Top off with proper grade of anti foaming fluid Install correct baffling Tighten all connections Insufficient Fluid Fluid is too heavy Oil filter is dirty Suction line too small Clogged suction line Pump over
5. Place the port end cover 20 over the gear hubs 19 and place in gear housing 18 face down The drive gear has longer bearing hubs to engage the ring seal Tap the port end cover 20 assembly gently down on the housing 18 with a soft mallet Be sure the square gasket 17 is not pinched or cocked 8 Put flat washers 21 over cap screws 22 or use Grade 8 threaded rod Place screws or threaded rod in holes in port end cover 20 Tighten evenly and alternately with a torque wrench to recommended torque shown in table DE FE for pumps and motors 53 E S 11 3000 5000 UNC 2A 3100 5100 Thread 5 8 11 7500 7600 UNC 2A Thread Note All bolts or tie rods must be SAE Class 8 with 150 000 PSI minimum tensile strength 9 Test the assembled pump for free rotation by turning drive shaft by hand using a wrench for leverage Caution Wrap several layers of cloth around shaft ends before applying wrench The shaft should turn with slight effort NO hard spots and NO rubbing noises If your pump or motor is a 3000 5000 or 7500 C series it is ready to put back in service But if it is a standard 7500 series unit and you did not install the bearing and snap ring earlier proceed to the following steps before putting it in service 10 Release the unit from the vise and turn end for end so that the shaft end is facing up Re clamp unit in vise 11 Install bearing 2 or bearing spacer 4 This is a slip fit over the s
6. Doweled 7600 Doweled Copyright 1982 PERMCO INC Bulletin 82 108 THIS IS THE PERMCO LINE REFUSE PUMPS BUSHING PUMPS YOUR PERMCO DISTRIBUTOR PUMPS DUMP PUMPS PERMCO INC P O BOX 2068 1500 FROST ROAD STREETSBORO OHIO 44241 0869 PHONE 330 626 2801 FAX 330 626 2805
7. Part Number On On Drawing Drawing 3000 SERIES PUMPS MOTORS 16 Thrust Plate TP X 0947 Teflon Coated Thrust Plate X 0947 TC 1 Snap Ring W023 206 Diverter Plate X 0947 DS 2 Outboard Bearing W58 39 Bi Rotational Diverter Plate X 0947 BRD 3 Double Lip Seal W62 26 16 17 Gasket Seal TA 2995 244 4 Bearing Carrier UA 0558 2 18 Housing LZ 0577 5 Seal Retainer ZD 0558 19 Drive Shaft amp Gear Set 0024L 6 High Pressure Seal W62 49 9 20 Port End Cover PEC YZ 0592 7 Shaft End Cover SEC 0574 21 5 8 Grade 8 Washers W033 2 8 Check Valve Assembly L 0280 K 22 5 8 11 Grade 8 Threaded Rod ZD 0391 9 Continental Shaft 0024 23 5 8 11 Grade 8 Hex Nut W3 65 10 Spacer SA 0558 24 Bearing Carrier ODO 11 Snap Ring W86 100 25 Connecting Shaft XZ 0022 12 Pump Shaft Seal W62 26 18 26 Gear Set LZ 0995L 13 Motor Shaft Seal W62 49 11 28 Grade 8 Hex Head Cap Screw W1 14 Ring Seal KA 0558 1XS 15 Crowned Roller Bearing X 0921 16 Thrust Plate TP ZZ 0947 7500 SERIES PUMPS MOTORS Teflon Coated Thrust Plate ZZ 0947 TC Diverter Plate ZZ 0947 DS 1 Snap Ring W85 315 17 Gasket Seal TA 2995 242 2 Outboard Bearing W58 48 18 Housing QZ 0577 3 Double Lip Seal W62 26 10 19 Drive Shaft amp Gear Set 0024L 4 Bearing Spacer UA 0558 20 Port End Cover WZ 0592 5 Seal Retainer QZ 0961 21 5 8 Grade 8 Washers W033 2 6 High Pressure Seal W62 49 1 22 5 8 11 Grade 8 Threaded Rod ZD 0391 7 5531 End Cover SEC
8. paragraphs carefully If you have any questions about rebuilding Permco pumps or about using Permco parts to upgrade other makes of pumps call your local Permco pump and parts distributor TWO TYPES OF PUMPS There are two types of Permco pumps as determined by the configuration of the shaft end covers Type amp Type Il There are slight differences in disassembly and reassembly procedures according to each shaft end cover Also Type Il is normally shorter from front to back than Type This is because no outboard bearing is used Be sure you know which type you are working on CLEANLINESS IS HIGHLY IMPORTANT WARNING Before you start disassembling the pump clean up your work bench This will avoid the headaches and danger of getting dirt metal fragments and foreign objects into the fine finished cavities and threads of the pump and components and eventually into the entire hydraulic system In pump maintenance extreme cleanliness is most important EM If you intend to rebuild a pump that has thrust plates and you wish to replace the thrust plates with Permco diverter plates inspect the original port end cover shaft end cover gear housing and bearing carriers very carefully To obtain the maximum performance from diverter plates all of the above components must be in good condition with minimal amount of wear The following areas of wear are the most critical and often overlooked 1 Shaft end covers po
9. speeding Air vent on fluid reservoir clogged Air bubbles in fluid Filter too small Coupling misalignment Air leaks at pump intake on pump shaft packing or inlet pipe Worn or broken pump parts FOAMING FLUID Improper fluid Low fluid level Inadequate baffling in tank Air leaking into suction line between reservoir and pump OIL LEVEL IN TANK CONTINUES TO Indicates a broken pipe line or a pipe left out between a bulkhead coupling and the bottom ofthe tank after cleaning tank Replace pipe DROP Oil level in tank continues to drop REMEDY Repair or replace control valve Replace cylinder packing Check cylinder walls for scoring and replace if necessary a Drain system and refill with lighter grade anti foaming fluid b Drain system and refill with heavier grade anti foaming fluid PROBLEM Internal leak in control valve or cylinder Erratic pump performance a If pump runs slow on startup and speeds up after fluid is warm fluid fluid grade is too heavy b If pump slows down after fluid has heated up fluid is too light MOTOR DOESN T DEVELOP PROPER TORQUE OR SPEED when pump is used as a motor Use a pressure gauge and increase relief valve pressure setting to proper level Disassemble relief valve and remove dirt from under ball or piston Check condition of filter to prevent recurrence Check for control valve in Neutral or for open return line
10. these parts into the same position when you put the unit back together 2 Clamp the unit in a vise shaft end down 3 Remove the cap screws or threaded rod 22 and washers 21 at the rear of the unit that hold the port end cover 20 and the gear housing 18 together Remove the port end cover 20 and diverter plate 16 or thrust plate 16 The roller bearings 15 will remain with the port end cover 20 On those units with thrust plates the pocket seals will come out easily Permco pumps having diverter plates do not require pocket seals 4 Remove the pump drive gear the driven gear and the gear housing 18 from the shaft end cover 7 BE CAREFUL to keep the drive gear and the driven gear together you must reassemble them as the original pair since they have been worked in together 3000 5000 Series Pumps Types I and Il a of Shaft End Cover If unit is equipped with a shaft bearing 2 or spacer 4 set the partially disassembled unit shaft end cover 7 from which the gear housing was separated in a vise with the pilot end up If unit is a Type Il it cannot be fitted with a shaft bearing 2 or spacer 4 Skip Step 2 below and proceed to Step 3 2 Remove the snap ring 1 from the shaft end cover 7 If a bearing is present pull it out with a bearing puller this is not a press fit In units used as motors a bearing 2 or bearing spacer 4 should be removed Then remove the seal retainer
11. 9 2 Press the bearing 2 off the GEAR end of the shaft 9 For 5000 Series Press the bearing 2 off the DRIVE end of the shaft 9 7500 Series Pumps Disassembly of Shaft End Cover 1 Set the partially disassembled unit shaft end cover 7 from which the gear housing has been separated in the vise pilot end up 2 Remove the snap ring 1 from the shaft end cover 7 The bearing 2 or bearing spacer 4 can now be removed It is a slip fit A bearing puller can be used if necessary 3 Remove the seal retainer 5 Discard the O ring 27 4 Remove the seal by inserting a curved tool between seal and seal retainer 5 tapping it out and discarding 5 Turn shaft end cover 7 pilot end down in vise Diverter plate will now be accessible 6 With a knife blade or thin blade screwdriver very gently pry diverter plate 16 off the bearings of the shaft end cover 7 If working on another make of pump to be refitted with PERMCO diverter plates remove the pocket seals and throw away PERMCO pumps and diverter plates require no pocket seals 7 Use a bearing puller to pull the roller bearings 15 out of the shaft end cover 7 if you plan to replace bearings If you pull the bearings check bores for out of round condition and elliptical shape If more than 0 003 out of round do not use again 8 Examine the ring seal 14 Replace if worn by pulling the drive gear bearing Type C pump has a separate s
12. SERIES P3000 P5000 0 GEAR PUMPS CONTENTS Table of Content Page wear Checking pai Dr DA A E 3 Th DALA e nn ren ee E 3 Diverter Plates Installing RER ME u uuu uuu l een 3 Bearing CHECKING TOR WE AM a ee ee a 3 Gal HOUSING checking TOF WON uuu ee ee ee 3 Covers 53 and port end Checking for wear 3 IYDESOLPERMC ES Pumps TYPE Neuen 3 Exploded Views PERMCO Pumps and DAS u ee 4 6 Parts numbers PERMCO Pumps and 0 8 anne seen 7 Type LE UND Ge SS iy nee een 8 SO ib se ee ee ee a nee 12 1YDe H PUNO OS SODI esr O E ee I een 8 ASS a ee EEE 12 187010657 Tor TEASE NDING Table gu uu u uuu u ea ee 15 Trouble Shooting List of symptoms and cures 17 Motors PERMCO PUMPE Used AS bb a SRE 18 Parts How to order PERMCO replacement information needed 19 If you are rebuilding a Permco gear pump you must not install thrust plates of another make Tolerances and finishes on Permco parts are held closer than those of other manufacturers of pump parts For warranty repairs under any circumstances you must not substitute other makes of parts in a Permco pumps USE ONLY GENUINE PERMCO PARTS You can successfully use Permco diverter plates to rebuild other makes of pumps to obtain increased operating pressures and pump life However read the above
13. Use pressure and flow gauges to check pump out put and pressure Realign belt drive or cou pling recheck torque requirements of pump for maximum input Relief valve incorrectly adjusted Relief valve sticking open Flow of fluid to tank is unrestricted Insufficient pump pressure or volume Misalignment of pump driver MOTOR SUBJECTED TO OVERPRESSURE when pump is used as hydraulic motor If you have used a standard control valve to control a hydraulic motor serious and catastrophic harm can result When the standard control valve is returned to Neutral to start or stop the motor sudden excessive pressure develops This pressure can burst seals fracture drive shafts burst housings and rupture hoses REMEDY Recheck pump rated speed Slow down driver to produce this speed Check pump driver coupling or belt alignment Install adequate support for pump Bleed air from hydraulic system PROBLEM Sustained excessive speed at pressure above pump maximum rating Drive misalignment Tight belt weight of pump supported by its drive shaft Entrapped air in hydraulic system OVERHEATED FLUID Drain system and refill with lighter grade of anti foaming fluid Drain system and refill with heavier weight anti foaming fluid Drain and flush system refill with proper grade of anti foaming fluid replace filter element Disassemble relief valve and remove contaminant Check condition of filt
14. e pump inlet side Double check the placement of the diverter plate 16 for correct positioning 3 Pour a little hydraulic oil STP or a compatible fluid over face of diverter plate 16 to lubricate gears immediately on start up Gently stone the sides of each gear 19 and 26 to remove any burrs Dip entire gear into cleaning solvent to remove all dirt and metal dust Install drive gear first then the driven gear Be sure both gears are firmly in contact with diverter plate 4 Lightly grease square gasket seals 17 and carefully install them in the grooves in the two faces of the gear housing 18 Be sure they are fully seated 5 Carefully place the gear housing sub assembly over the gears on top of the shaft end cover 7 Make sure the square gasket 17 is not pinched or cocked then tap the gear housing 14 18 down on the shaft end cover 7 with a soft 15 mallet Pour a little fluid over the gears while rotating the drive shaft This will provide immediate lubrication when starting up pump If the unit is a single one skip Step 6 and go to Step 7 6 Position the assembled bearing carrier over the gear journals and gently tap it into place Be sure the high pressure crescents of the diverter plate 16 are positioned towards the pump low pressure side Install the connecting shaft 25 Repeat Steps 3 through 7 above until you attach the final gear housing 18 Then pick up at Step 7 below 7
15. e shaft end cover 7 with flat side down 2 Replace the two roller bearings 15 in the bores of the shaft end cover 7 Take care that the drive bearing 15 does not cock or wedge between the ring seal and bottom of bearing counter bore 3 Place shaft end cover 7 in a soft jaw vise Turn cover end for end and clamp with flange end up 4 Apply Loctite Adhesive Sealant No 271 to outside of seal 3 or 6 Press seal into seal retainer 5 metal side down Be careful not to damage seal Install O ring 27 on outside of seal retainer 5 5 Push this assembly into shaft end cover 7 with seal on inboard side You can install bearing or bearing spacer and snap ring now or atthe end of assembly Continental Shafts For Type pumps with C Type shafts follow the above steps 1 through 4 then proceed as follows 5 Push seal assembly into shaft end cover 7 with seal on inboard side 6 Press the outboard bearing 2 on the drive shaft 9 from the gear end 7 Push spacer 10 over the end of the shaft 9 Install snap ring 11 in the groove on shaft 9 8 Press the bearing 2 and spacer 10 tightly against the snap ring 11 9 Lubricate the drive shaft 9 and put this assembly into the shaft end cover 7 Be careful not to damage the seal 10 Install the snap ring 1 in the groove The shaft end cover reassembly is now complete 13 All Series Reassembly of Port End Covers 1 If you
16. er to prevent recurrence Use gauge and adjust relief valve setting to correct pressure Repair worn pump parts or replace pump Repair or replace relief valve Disassemble pump and back off over torqued component to tightness specified in this maintenance manual Replace with proper size hose and valves Re plumb system to eliminate restrictions Install larger reservoir or add fluid radiator Locate and repair leaks Fluid too heavy Fluid too light for high temperature pump location Dirty fluid Dirt or chip caught between plunger and seat of relief valve Incorrect setting on relief valve Worn pump permits oil to bypass internally Relief valve leaks or not operating Excessive friction caused by pump components over torqued Undersize hoses and valves in system Restrictions and excessive bends in lines Inadequate reservoir prevents adequate cooling of fluid Internal leaks not in pump PUMP NOT EFFICIENT Repair or replace pump Bleed air from system check line connections for air leaks Worn pump parts reduce pump efficiency Air in system Bearing arrangement With or without outboard bearings Double out board bearings Bearing measurements Any drains or grease fittings Drive shaft Diameter of shaft end Keyed or not Length of spline Number of spline teeth O D Total length of shaft Housing Width of housing Inside diameter of ports
17. gure L indicates very slight wear with some scratches because of contamination Figure M shows wear in the trapping area caused by contamination In bi rotational units where there are two trapping grooves a diagonal groove may develop connecting the two slots This is caused by contamination Figure N shows the effect of cavitation the rapid formation and collapse of vapor cavities within a fluid This effect is caused by high vacuum inlet conditions or by air entering the pump inlet 3000 5000 Series Pumps Reassembly of Shaft End Cover 1 Grip shaft end cover 7 gear end up Place ring seal 14 in bearing bore of shaft end cover 7 with the flat side down 2 Replace the two roller bearings 15 in the bores of the shaft end cover 7 Take care that the bearings do not cock or wedge between ring seal 14 and bottom of bearing counter bore 3 Place shaft end cover 7 in a soft jaw vise Turn cover 7 end for end and clamp with flange end up 4 Apply Loctite Adhesive Sealant No 271 to outside of seal 3 6 12 or 13 Press seal into shaft end cover 7 until seal is flush with counter bore If working on a Type pump which has no outboard bearing or a Type ll pump assembly of shaft end cover is now complete If working on Type unit having bearing or bearing spacer and integral gear shaft continue as follows 5 In motors only insert the seal retainer 5 into the shaft end cover 7 6 Guide
18. haft 9 and into shaft end cover 7 12 Install the snap ring 11 into groove Your standard 500 series unit is now ready to put back in service START UP INSTRUCTIONS FOR PERMCO PUMPS FOLLOW THESE INSTRUCTIONS CAREFULLY If you don t you can instantly ruin your pump if the relief 1 Before you operate the pump unscrew the main relief valve adjusting screw on the main hydraulic system OR remove adjusting shims or spacers 2 Run the pump about five minutes under ZERO PRESSURE with all control valves in neutral position If the test system has a throttling valve set it at 100 psi above user s expected operating pressure 3 If everything seems to function properly and no unusual noises are heard back off the throttling valve to zero Shut down the system 4 Adjust the relief valve pressure to the setting your hydraulic system requires LUBRICATION OF PERMCO PUMPS 1 The hydraulic oil used in the entire circuit provides the lubrication for all parts of the pump KEEP THIS OIL CLEAN AND FREE OF DIRT PERMCO recommends a 25 micron return filter and a 149 micron 100 mesh screen suction filter to fully protect the pump and system from excessive wear and damage from dirt 2 Ifthe pump fails and you think metal particles have gotten in the circuit a Drain ALL oil from the whole system b Flush the system with kerosene c Refill the system with fresh oil of correct grade These are correct oils Viscosity
19. haft and gear set Disassembly of Type C Continental Shaft End Cover Follow the steps described above for the standard shaft end cover However on the Type C unit the shaft 9 will be pressed out of the cover 7 along with the bearing 2 Separate the shaft 9 from the bearing 2 as follows 1 Remove snap ring 11 and spacer 10 from gear end of shaft 9 2 Press bearing 2 off gear end of shaft 9 Disassembly of All Series Gear Housing Single Units and Multiple Units 1 Remove square gasket seals 17 from gear housing 18 and discard Have identical replacements at hand for reassembly DO NOT USE O RINGS Check for depth of wear in gear housing at this time use a telescoping gage and a micrometer If wear pattern on gear housing exceeds 0 003 discard housing and replace with a new one Figure A shows a Satisfactory housing with little wear Figure B shows a housing with excessive wear notice large cavities that indicate cavitation was present Examine the housing for cracks Figure C This is caused by overpressure or by possible over tightening of an NPT thread lf a new gear housing is required and a large port is present step drill the housing Figure D if PERMCO diverter plates are to be installed 2 Examine gears for wear scuffed or pitted journals scratched or scuffed tooth faces or deep nick on tooth edges If any of these defects are present install new drive and drive
20. index at 100 F 37 C 90 or higher Viscosity SUS at 100 F 37 C 150 to 300 32 65 CST Aniline point 165 or higher Anti foam and anti oxidant additives 3 Temperature of oil should never exceed 185 F 85 C 4 NEVER use low viscosity naphtha base oils aircraft hydraulic fluids or automotive brake fluids without consulting PERMCO INC or a Permco distributor 5 For extended operation at temperatures below 20 F 7 C always use a low pour point oil of top quality 16 REMEDY IMMEDIATELY STOP PUMP DRIVER to prevent damaging pump Then reverse direction of pump rotation Tighten up joints Drain system and replace fluid with proper grade of anti foaming fluid Open valve on pressure side of pump or install air bleed valve PROBLEM Pump rotating in wrong direction Pump fails to prime itself a Airleak into suction line b Oilis too heavy c System notin Neutral SYSTEM LACKS ANY PRESSURE WITH PUMP RUNNING Use pressure gauge and reset valve to specified pressure Check relief valve seat for score marks Reseat by grinding Or replace Replace spring reset relief valve Check for control valve in Neutral or for open return line Repair or replace leaking valve or cylinder Relief valve not set correctly Relief valve leaking Broken relief valve spring Flow of fluid to tank is unrestricted Internal leakage in control valve or power cylinder EXCESSIVE WEAR IN PUMP
21. n gears Figure E shows a satisfactory gear hub with no nicks Figures F and G show gear hubs that are breaking down from contamination over pressurization pressure shock or bearing failure On examination of gear faces some scratches may be found if they can be removed by stoning the set can be reused see Figures H and Also examine the ring seal surface Figure J for wear Figure K shows a rotating group that ran without oil For Multiple units 3 Remove the connecting shaft 25 4 Remove the bearing carrier 24 diverter plate 16 or thrust plate bearings 15 and ring seals 14 using procedure described previously for disassembly Port End Cover 1 Use a knife blade or thin blade screwdriver to gently pry the diverter plate 16 or the thrust plate off the bearings 15 of the port end cover 20 2 When working on pumps other than PERMCO Pumps remove and discard the pocket seals When installing PERMCO diverter plates you do not install replacement pocket seals PERMCO Diverter Plates do not require pocket seals 3 If you plan to replace the two shaft roller bearings 15 with new ones pull the bearings 15 out of the port end cover 20 with a bearing puller 4 Examine the ring seal 14 If worn replace by pulling the drive gear bearing 15 out leaving the driven gear bearing 15 in place Examine all diverter or thrust plates Some wear will always appear because of gear flexing Fi
22. removed the two roller bearings 15 or the ring seal 14 during disassembly install new bearings 15 and ring seal 14 in the port end cover 20 Place the ring flat side down in the drive gear bearing bore and make a medium press fit 2 Place the diverter plate 16 over the two roller bearings 15 The counter bored side of the diverter plate 16 should be placed over the bearings 15 with the high pressure crescent recesses toward the pump inlet side Double check the placement of the diverter plate 16 for correct positioning Reassembly of Bearing Carrier 1 If you removed the four roller bearings 15 or ring seals 14 during disassembly install new bearings 15 and ring seals 14 in the bearing carrier 24 Place the ring seals 14 flat side down in the drive gear bearing bore and press bearing with a medium press fit 2 Place the diverter plate 16 over the two roller bearings 15 The counter bored side of the diverter plate 16 should be placed over the bearings 15 with the high pressure crescent recesses on the pump inlet side Double check the placement of the diverter plate 16 for correct positioning Final Reassembly 1 Clamp the shaft end cover 7 assembly in a soft jaw vise gear end up 2 Place the diverter plate 16 over the two roller bearings 15 The counter bored side of the diverter plate 16 should be placed over the bearings 15 with the high pressure crescent recesses on th
23. rt end covers and bearing carriers Check bearing bores for out of roundness or elliptical shape If more than 0 003 out of round do not use 2 Gear housings If the wear pattern on the inlet side is in excess of 0 003 depth do not use 3 Gears Inspect very carefully If you have scored scuffed or pitted journals scratched or scuffed tooth faces deep nicks on tooth edges do not use install new drive and driven gear 4 Bearings A loose fit between gear hub and bearing ID may not mean a bad bearing The misalignment it can cause is detrimental to good pump performance We recommend installing a complete set of new bearings at each rebuild 5 Seals lt is recommended that all seals be replaced on any rebuild job Putting Permco diverter plates into a pump and reusing the old worn parts will not necessarily restore the pump to the high efficiency and performance of a new Permco pump Merely installing new Permco diverter plates cannot restore the pump to its original performance Permco s high efficiency performance and life expectancy are based on using all new PERMCO parts 3000 5000 SERIES TYPEI gt TYPE II Pumps Only TYPEIc 3000 TYPEIc 5000 PUMP OR MOTOR ER TANDEM Lu A gt TYPEI Il or gt a DUAL TANDEM A DI 7500 SERIES Item No Description Part Number Item No Description
24. the bearing 2 or bearing spacer 4 into the shaft end cover 7 This is NOT a press fit 7 Install snap ring 1 into the groove Reassembly of shaft end cover 7 is now complete 3000 5000 Continental Shafts For Type pumps with C type shafts follow the above Steps 1 through 5 Then proceed as follows For 3000 Series All C Shafts 6 Press the outboard bearing 2 on the drive shaft 9 from the gear end 7 Push the spacer 10 over the end of the shaft 9 Install the snap ring 11 in the groove on the shaft 9 8 Press the bearing 2 and spacer 10 tightly against the snap ring 11 9 Lubricate the drive shaft 9 and put this assembly into the shaft end cover 7 Be careful not to damage seal 12 or 13 10 Install the snap ring 1 into the groove of shaft end cover Assembly of shaft end cover is now completed 12 REASSEMBLY For 5000 Series C shafts Follow Steps 1 through 5 from previous page then proceed as follows 6 Press the outboard bearing 2 onto the drive shaft 9 from the drive shaft end 7 Lubricate the drive shaft 9 and put this assembly into the shaft end cover 7 Be careful not to damage seal 12 or 13 8 Install snap ring 1 into the shaft end cover groove Assembly of shaft end cover is now completed 7500 Series Reassembly of Shaft End Cover 1 Grip shaft end cover 7 gear end up Place ring seal 14 in the bearing bore of th
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