2500/3700 Service Manual
Contents
1. 5 b For drive shafts larger than 1 in diameter 1 Hold the needle bearing assembly 18 thru 23 31 and 32 forward towards the drive end of the drive shaft 30 Remove snap ring 32 with snap ring pliers 2 Slip the snap ring retainer 31 two thrust bearing races 22 thrust bearing roller 23 0 ring 21 needle bearing 20 bearing and seal retainer 19 and double lip seal 18 off the gear end of the drive shaft 30 6 On both diameters of shafts remove seal 18 and 0 ring 21 from seal and bearing retainer 19 Be sure you have new replacement seal and 0 ring available for replacement 7 When installing needle bearing 20 press the old bearing out of the seal and bearing retainer 19 Have a new bearing on hand for reassembly GEAR HOUSING Remove square gasket seals 37 from grooves in gear housing 38 and discard Have replacement seals at hand for re assembly Check for depth of wear at this time using telescoping gage and micrometer with the depth tolerance as described on Page 3 Paragraph 2 PORT END COVER 1 Gently pry off the diverter plate 36 or thrust plate with a knife blade or thin blade screwdriver On other makes the pocket seals should be re moved and discarded PERMCO diverter plates require no pocket seals 2 To install new roller bearings 35 pull these bearings from the port end cover 41 bearing bores with a bearing puller After bearings have b2. 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 PUMP NOT EFFICIENT Worn pump parts reduce pump efficiency Air in system Repair or replace pump Bleed air from system check line connections for air leaks PROBLEM Internal leak in control valve or cylinder REMEDY Repair or replace contro valve Replace cylinder packing Check cylinder walls for scoring and replace if necessary Erratic pump performance a Drain system and refill a If pump runs slow on with lighter grade anti startup and speeds up foaming fluid after fluid is warm fluid fluid grade is too heavy b If pump slows down after fluid has heated up fluid is too light b Drain system and refill with heavier grade anti foaming fluid MOTOR DOESN T DEVELOP PROPER TORQUE OR SPEED when pump is used as a motor Relief valve incorrectly adjusted 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 Relief valve sticking open Check for control valve in Neutral or for open return line Flow of fluid to tank is unrestricted Insuff
3. left out between a bulkhead coupling and the bottom of the tank after cleaning tank Replace pipe PROBLEM Pump rotating in wrong direction Pump fails to prime itself a Air leak into suction line b Oil is too heavy c System not in Neutral 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 SYSTEM LACKS ANY PRESSURE WITH PUMP RUNNING 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 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 EXCESSIVE WEAR IN PUMP Abrasive contaminants in fluid Fluid too light for pump service Sustained pressure above pump maximum rating Drain and flush entire system Install new filter Fill system with fresh oil of proper grade or filter con taminated 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 foam
4. Permco diverter plate 36 over the gear hubs and into the gear housing face down counter bores up The plate should rest slightly below the housing surface Next place the port end cover assembly 41 on top of the gear housing guiding the hubs of the gears 39 and 40 into the I D of the roller bearings Gently tap the port end cover 41 down onto the housing with a rubber or rawhide mallet Be sure the square gasket is not cocked or pinched 13 RECOMMENDED TORQUE FOR PUMPS ASS Y AND MOTORS SERES Size REQURED TORQUE 2500 5 8 11 UNC 2A 4 200 Ft lbs THREAD 3700 1 2 13 UNC 2A 120 THREAD Ft Ibs NOTE ALL BOLTS OR TIE RODS MUST BE SAE CLASS 8 TENSILE STRENGTH 150 00 PSI MIN 14 6 Put flat washers 42 on the cap screws 43 and drop them into the port end cover 41 holes Alternately tighten the cap screws 43 evenly to required torque with a torque wrench See chart 7 Test the assembled pump for free rotation by turning the drive shaft CAUTION Wrap several layers of cloth around the shaft ends before applying the wrench The shaft should rotate with very little effort and NO hard spots and NO rubbing noises A YOUR TYPE II OR TYPE IlI PUMP IS NOW READY TO GO BACK INTO SERVICE B YOUR TYPE PUMP STILL NEEDS THE FOLLOWING 8 Release the Type Pump from the vise turn it end for end so drive shaft 8 and 14 is facing up re clamp in vise 9 Use a face spanner wrench to
5. cover 41 2 On makes of pumps other than PERMCO re move and discard the pocket seals You do not need pocket seals when installing PERMCO diverter plates these patented diverter plates do not use pocket seals 3 Only if you are replacing the two shaft roller bearings 35 with new ones pull the bearings out of the port end cover 41 with a bearing puller TYPE Il PUMP 1 With a sharp metal scribe grease pencil magic marker or paint make an indexing mark that runs straight across a surface of the port end cover 41 gear housing 38 and shaft end cover 26 This will enable you to reassemble these parts into the same position when you put the pump back together 2 Remove the cap screws 43 and washers 42 from the port end cover 41 3 Separate the port end cover 41 from the gear housing 38 and the diverter plate 36 or thrust plate from the bearings of the port end cover The roller bearings 35 will remain intact with the port end cover In pumps with thrust plates the pocket seals will be easily removable Permco pumps with diverter plates do not require pocket seals 4 The drive gear 39 and the driven gear 40 will still be in the gear housing 38 Remove them BE CAREFUL to keep the drive gear 39 and driven gear 40 together it s recommended that you reassemble them as the original pair later since they have worked in together Now separate the gear housing 38 from the shaft end cove
6. the unit 6 Bearing carrier have f SM Inside diameter of ports Direction of flow thru 4 Check Series Identification Table below to internal passage or coring determine series 7 Gears STEPS IN IDENTIFICATION Gear tooth width Gear O D measured over teeth If gears are integral describe drive end of drive gear as in Paragraph 3 above 1 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 SERIES STUD HOLES STUD DIA CONTINENTAL INTEGRAL HOUSING HOUSING WIDTH No and Dia Two Piece Drive One Piece Drive Height GEAR WIDTH Shaft amp Gear Set Shaft amp Gear Set 3000 4 11 16 5 8 X 5 3 8 3 4 3100 Doweled 5000 4 11 16 5 8 X 3 4 5100 Doweled 7500 8 11 16 5 8 x 7 7 8 1 7600 Doweled Continental Two Piece Drive Shaft amp Gear Set available on Series 3000 5000 and 7500 as specials consult factory Copyright 2006 Permco Bulletin 06 2537A 18
7. tighten the retainer ring 1 snugly 10 Provide required preload on the pump bear ings and correct running clearance for the pump as follows a With the threaded retainer ring 1 snugged up scribe a match mark across the face of the retainer ring 1 and the face of the flange of the shaft end cover 9 b Using the face spanner wrench unscrew the retainer ring 1 so that the two ends of the match mark are 1 2 apart measuring from the outer end of the mark on the outside diameter of the retainer ring 1 This amount of relief will provide the desired 0 005 clearance to produce the required bearing preload and adjustment c After you have checked the distance between the two halves of the match mark to be 1 2 stake the outer edge of the retainer ring 1 into the groove or slot provided in the I D of the pilot of the shaft end cover 9 Use a blunt tool and hammer to force the metal of the retainer ring 1 into the pilot groove or slot of the shaft end cover Check to be sure the ring is firmly locked in place C YOUR TYPE PUMP IS NOW READY TO GO BACK INTO SERVICE START UP INSTRUCTIONS FOR PERMCO PUMPS FOLLOW THESE INSTRUCTIONS CAREFULLY If you don t you can instantly ruin your pump if the relief pressure setting is too high 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
8. 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 hydrau lic 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 If the pump fails and you think metal particles have gotten in the circuit a Drain ALL oil from the whole system Flush the system with kerosene c Refill the system with fresh oil of correct grade These are correct oils Viscosity index at 100 F 37 C 90 or higher Viscosity SUS at 1000 F 37 C 150 to 300 32 65 CST Aniline point 165 or higher Anti foam and anti oxidant additives o 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 con sulting PERMCO INC or a Permco distributor 5 For extended operation at temperatures below 20 F 7 C always use a low pour poi
9. 14etc in shaft end cover 9 13 Thread the retainer ring 1 loosely into shaft end cover 9 but DO NOT tighten retainer ring 1 enough to preload bearing 5 6 this will be done later 14 Release shaft end cover 9 from vise turn cover end for end and clamp with flange end down 15 If you are reassembling a single rotation pump and if you removed the plug 10 installed on the high pressure side of the pump replace it leave the low pressure opening unplugged If your pump is a double rotation unit and if you re moved the two check assemblies 10 replace with new valves TO COMPLETE THE ASSEMBLY OF A TYPE I PUMP skip to Page 13 Port End Cover Assembly TYPE Il PUMP REASSEMBLING THE TYPE Il PUMP SHAFT END COVER 1 With the shaft end cover 26 gear end up install bronze shaft bushing 33 with flange down 2 Place conical spring 34 against bronze shaft bushing 33 with smaller end of spring over pilot shoulder of bushing 3 If you removed them replace the two roller bearings 35 in the bores of the shaft end cover 26 Take care that the top of the conical spring 34 does not cock or wedge between bearings 35 and bottom of bearing counter bore 4 Place shaft end cover 26 in a soft jaw vise flange end up 5 With lip of seal 18 facing up press seal into 11 recess in bearing and seal retainer 19 If you removed needle bearing 20 during disassembly press it into bea
10. 6 W015 7 Replace original key with identical key See Engineering 37 Catalog 38 0575 39 amp 40 S 0280 L 0280 K KZ 0961 W62 49 3 XZ 0558 1 W86 100 W023 206 W62 26 15 FZ 0961 W0921 K 2995 109 W051 D9 DA 0558 ZU 1909 Q 2995 8 J 2909 19 CA 0558 W093 02 Order This Part Number U 0961 Type IZ 0961 Type III QZ 0558 Type only W62 26 10 K 2995 33 Type K 2995 4 Type III W015 5 Replace original key with identical key 0023 0575 0280 L 0280 K LZ 0961 Type IZ 0961 Type III W62 49 1 ZF 1909 Z 0216 177 Q 0921 ZA 0558 41 42 43 amp 55 44 45 47 48 49 50 51 52 53 54 56 57 58 A IA lA mm om me Sm ms es es Ss of 3700 SERIES PUMPS QuantityTo Item Number Order On Exploded Qu 37 38 39 amp 40 41 42 43 amp 55 44 49 50 51 52 53 54 4 per section 56 1 47 Order This Part Number W093 02 ZG 1909 Z 0216 182 R 0921 X 0947 X 0947 TC X 0947 DS X 0947 BRD TA 2995 244 LZ 0577 JZ 0996L QZ 0592 W033 2 5 8 11 Grade 8 W004 19 ZQ 1909 FA 0558 XZ 0558 1 SZ 0408 ZQ 1909 J 0576 kkk SZ 0022 3 8 16 Rod W78 05 W3 65 GZ 0961 K 2995 47 W62 26 10 W62 49 1 Order This Part Number W 86 112 W 0947 W 0947 TC W 0947 DS W 0947 BRD TA 2995 249 KZ 0577 12 0996L MZ 0592 W033 1 1 2 13 Grade 8 W004 19 LZ 0408 ZV 1909 7 0576 n kkk RZ 0022 3 8 16 Rod W78 05 W3 40 GA 0558 Q
11. SERIES P2500 P3700 GEAR PUMPS Read this manual carefully before you start to assemble disassemble or rebuild your Permco pump and also before you use Permco s patented diverter plates 4 E 2 PERMCO PUMP MAINTENANCE Table of contents Page Wear Checking parts for eacee a a a aa m eese ee esee en a ss n3 sse seme ese ires e e rent rh It treten 3 TArust ad FE 3 Diverter Plates Installing PERMCO 2 2 ccc ccc cee cee cee cee cee cee tee eee eee eerte Bearings Checking for Weal ccccc cece cece enee eee e ee cee eese hene hh ehe eee ense hene ssse te s rh senem ete tese sen nnns 3 Gear Housings checking for Weale srest ee eee ee eee E NEN en he mense sem etes ede cee rese se mete tenens 3 Covers Shaft end and port end Checking for wear ssssssssssssssssssssses ese eee esee 3 Types of PERMCO pumps Types I Il Ill III t IMtettttret 3 Exploded views PERMCO Pumps and parts ssssssssssssssssssssse Ime nme mem er ttr 4 5 6 Parts numbers PERMCO Pumps and Motor sssssssssssssssssssssses I emen ee he esse sesa rise ess sese sanas 7 Type I Pump disassembly neresna iet tare n Ono e E a ea T Wee ean RC QU ep MESS 8 reassembly U Uem 9 Type I l MIRIE t uueeR EET 9 LCECIIDMURH E a a A 11 Type Ill Pump GiISAS
12. SOMDIY aranc annone oiai hee oa ia E E OE R SES E 9 t assembly ceci ae a oa a a aaa ven a a a a a aa aa he Type IIl double outboard bearing pump sssssssssssssssss III II tme rtt 12 Torques for reassembling Table of ssssssssssssssssssssssssssesese sese ems esee seen Ihre I rennen nens 14 Start up Instr ctlors eere UR cd dees e danda de n danse Qutelpem E NT RITC QU petu a 15 Trouble Shooting List of symptoms and cures ssssssssssssssee e eme meme ene eese eme se eene 16 Parts How to order PERMCO replacement information Ne ded c c cece ccc e ee ec ea eeeeeeee eee eaeneeeeneeseaenes 19 EERMED 2 PERMCO INC 2002 If you intend to rebuild a pump that nas 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 maxi mum 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 port 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 sco
13. akes of pumps call your local Permco pump and parts distributor THREE TYPES OF PUMPS There are three types of Permco pumps as determined by the configuration of the shaft end covers Type l Type 11 and Type I Il There are slight differences in disassembly and re assembly procedures according to each shaft end cover Also Type II and Type Ill are normally longer from front to back than Type 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 com ponents and eventually into the entire hydraulic system In pump maintenance extreme cleanliness is most important eens SII 2500 SERIES TYPEI SHAFT TYPE Il SHAFT 1 dia or smaller 1 or smaller N TYPE It SHAFT Larger than 1 TYPEISHAFT Larger than 1 dia Exploded View of Pump or Motor ERM 3 00 SERIES DUAL TANDEM PUMP OR MOTOR ERMET Item Number On Exploded View 8 14 24 30 46 9 amp 26 10 11 12 15 16 17 18 19 20 21 22 25 27 28 29 31 32 Item Number On Exploded eu NOTE PARTS ORDERING NUMBERS Order This Part Number 2500 SERIES PUMPS Quantity Item Number To Order On Exploded eM V 0961 RZ 0558 W62 26 13 K 2995 2
14. bly install new bearings in the two bores in the port end cover 41 Fit should be at least a light press fit 2 Put the diverter plate 36 over the two roller bearings 35 Counter bored side of the diverter plate should be placed over the bearings with the high pressure crescent recesses on the inlet side and the gear relief recess on the high pressure side of the pump Double check this FINAL ASSEMBLY 1 Clamp the shaft end cover assembly 26 etc in a soft jaw vise gear end up 2 Pour a little hydraulic or STP oil over face of diverter plate 36 to lubricate gears on startup Gently stone the sides of each gear 39 and 40 to remove any burrs Dip whole gear into cleaning solvent to remove dirt and metallic dust particles Install the drive gear 39 in bore over spline of the shaft Next install the driven gear 40 Be sure both gears firmly contact plate 3 Lightly grease square gasket seals 37 carefully install them in the grooves in the two faces of the gear housing 38 Be sure they are properly seated 4 Carefully place the gear housing subassembly 38 etc over the gears on top of the shaft end cover 26 Making sure that the square gasket 37 is not being pinched or cocked gently tap the gear housing 38 down on the shaft end cover 26 with a plastic or rawhide mallet Pour a little hydraulic oil or STP over the gears while ro tating the drive shaft for startup lubrication 5 Place the
15. een removed check bores for out of roundness and elliptical shape If more than 0 003 out of round do not use END OF DISASSEMBLY OF TYPES I AND Il PUMPS TYPE Ill PUMP For Type Ill disassembly is the same as Type larger than 1 1 8 diameter However there are two tapered roller bearings 5 and 6 on shaft 46 REASSEMBLING TYPE PUMP REASSEMBLING THE TYPE PUMP 1 Grip shaft end cover 9 gear end up Place bronze shaft bushing 33 in the bearing bore of the shaft end cover 9 with bushing flange down 2 Place conical spring 34 against bronze shaft bushing 33 with smaller end of spring over pilot shoulder of bushing 3 Replace the two roller bearings 35 in the bores of the shaft end cover 9 Take care that the top of the conical spring 34 does not cock and wedge between bearing 35 and bottom of bearing counter bore 4 Place shaft end cover in a soft jaw vise Turn cover end for end and clamp with flange end up FOR PUMP WITH DRIVE SHAFT SMALLER THAN 1 1 8 DIAMETER 5 Repack tapered roller bearing 6 with good lithium base high temperature bearing grease No 2 consistency 6 Carefully press the bearing 6 on the drive shaft 8 Be sure the larger diameter of the bearing 6 is seated against the shoulder of the drive shaft 8 7 Insert the assembled drive shaft 8 into shaft end cover 9 Be sure shaft bushing 33 is centered in the shaft cover bore 9 8 Place beari
16. hium base high temperature bearing grease Press the bearings with a spacer 47 between them onto the shaft 46 Be sure that the larger diameter end of the bearing 6 is seated against shaft shoulder Next install spacer 48 to insure proper running clearance Try using the 0 133 thick spacer 48a and snap ring 16 first If spacer does not fit use the 0 128 thick spacer 48b Double tapered roller bearing units do not have a conical spring 34 behind the bronze shaft bushing Double bearing units have a roll pin 44 pressed into the drive bearing bore of the shaft end cover as shown Next the bronze bushing 45 is install ed with the slot placed over the roll pin and this flange portion up Before inserting the assembled shaft into the shaft end cover make sure that the shaft bushing 45 is centered around the shaft Take care not to nick or damage bronze shaft bushing when inserting the shaft assembly Continue assembly procedure In the final assembly procedure the threaded retainer ring 1 should be tightened securely and staked DO NOT BACK OFF RETAINING RING BEFORE STAKING It is not necessary to back off the retainer ring since the use of the spacer 48 of the proper thickness assures correct running clearance With single bearing assemblies as before the retaining ring must be backed off 1 2 before staking PORT END COVER ASSEMBLY 1 If you removed the two roller bearings 35 during disassem
17. icient pump pressure or volume Use pressure and flow gauges to check pump out put and pressure Misalignment of pump driver Realign belt drive or cou pling recheck torque requirements of pump for maximum input 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 HOW TO ORDER PARTS ALWAYS GIVE US THE SERIES NUMBER please 2 Bearing arrangement It instantly tells us what PERMCO Pump or Motor With or without outboard bearings Double out you want parts for You will find this Series Number board bearings Bearing measurements Any on the nameplate drains or grease fittings 3 Drive shaft Diameter of shaft end Keyed or not Length of spline Number of spline teeth O D Total length of shaft IF YOU CANNOT SUPPLY THE SERIES NUMBER Please answer these questions 1 Is the unit a pump or a hydraulic motor A Wousina Housing md ipe which Wey toes It frotal when d Width of housing Inside diameter of ports look at it from the shaft end Clockwise Or amp Part end i Counter Clockwise DEN O Inside diameter of ports 3 How many gear housing sections does
18. ing fluid of proper grade Check and reset relief valve pressure using pressure gauge 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 REMEDY Recheck pump rated speed Slow down driver to produce this speed Check pump driver cou pling or belt alignment Install adequate support for pump Bleed air from hydraulic system OVERHEATED FLUID 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 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 filter to prevent recurrence Use gauge and adjust relief valve setting to cor rect pressure Repair worn pump parts or replace pump
19. l the bearings check bores for out of roundness and elliptical shape If more than 0 003 out of round DO NOT USE If you need to remove only the conical spring 34 and shaft bushing 33 pull ONLY the shaft end drive bearing do not pull the shaft end driven bear ing NOTE Skip Step 7 If the pump drive shaft is 1 1 8 or smaller in diameter go directly to Step 8 If the shaft is larger than 1 1 8 in diameter 7 Remove snap ring 16 and spacer 15 from gear end of shaft 8 If the drive shaft is 1 1 8 or smaller in diameter press the tapered bearing 6 the cup 5 seal retainer 2 and lip seal 3 off the DRIVE end of the shaft If the shaft is larger than 1 1 8 in diameter press these four parts off the GEAR end of the shaft 9 Remove and discard the 0 ring from bore in shaft end cover 9 Have an identical new replace ment 0 ring ready for reassembly Remove and discard lip seal 3 from seal retainer 2 have re placement lip seal on hand for reassembly GEAR HOUSING 1 Remove square gasket seals 37 from gear housing 38 and discard Have identical replace ments on hand for reassembly Do Not re use 0 rings Check for depth of wear at this time using a telescoping gage and a micrometer with the depth tolerance as described on Page 3 Paragraph 2 PORT END COVER 1 With a knife blade or thin blade screwdriver gently pry the diverter plate 36 or thrust plate off the bearings of the port end
20. ng cup 5 over tapered roller bear ing 6 Carefully press or tap cup down to seat firmly against bottom of bearing bore 9 Press lip seal 3 into recess in seal retainer 2 with lip of seal facing up Put 0 ring into bearing bore on top of bearing cup 5 10 Install this seal retainer subassembly 1 2 3 4 over drive shaft being careful to seat it firmly against top side of bearing cup 5 NOTE If you are reassembling a unit used as a MOTOR with either diameter shaft press a motor shaft seal 12 into the seal retainer 11 using proper shaft seal tool FOR PUMP WITH DRIVE SHAFT 1 1 8 DIAMETER AND LARGER 5 Carefully press lip seal 3 into seal retainer 2 with lip of seal facing outward 6 Next press this seal retainer subassembly 2 3 onto drive shaft 14 Small end of subassem bly should face outer or drive end of shaft 14 7 Put O ring 4 into groove in seal retainer 2 8 Repack tapered bearing 6 with good lithium base high temperature bearing grease No 2 consistency 9 Carefully press bearing 6 on drive shaft 14 Be sure smaller diameter of bearing 6 is facing towards the seal retainer 2 Place bearing cup 5 over bearing 6 10 Push the spacer 15 over gear end of shaft 14 Put snap ring 16 in correct groove on shaft 14 11 Press seal retainer assembly 2 3 4 bearing 5 6 and spacer 15 tightly against snap ring 16 12 Insert assembled drive shaft
21. nt oil of top quality T FERMEI TROUBLE SHOOTING PROBLEM REMEDY EXCESSIVE NOISE IN PUMP Insufficient Fluid Fluid is too heavy Oil filter is dirty Suction line too small Clogged suction line Pump over 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 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 OIL LEVEL IN TANK CONTINUES TO DROP Oil level in tank continues to drop Indicates a broken pipe line or a pipe
22. p ring retainer 31 8b Push this entire bearing assembly 18 23 31 together on drive shaft 30 hold firmly against shaft shoulder on drive of shaft 30 9b Install the snap ring 32 to hold the bearing assembly 18 23 31 in place NOW RESUME ASSEMBLY OF PUMPS WITH EITHER DIAMETER DRIVE SHAFT 10 Insert complete drive shaft assembly 18 23 or 18 23 31 32 into shaft end cover 26 11 Install retaining ring either spiralox or snap ring 17 into groove in shaft end cover 12 Release shaft end cover 26 from vice turn cover end for end re clamp with gear end up At this point check to be sure plugs or check assem blies are firmly in place NOTE Double rotation pumps require TWO check assemblies 10 single rotation pumps DO NOT require check assemblies but DO require a plug in the high pressure side of the pump and NO plug in the low pressure open ing TYPE Ill PUMP REASSEMBLING THE TYPE Ill PUMP 1 Put the PERMCO diverter plate 36 in position over the two bearings 35 Counter bored side of the diverter plate should be placed over the bearings high pressure crescent recesses should be on the pump inlet side gear relief recess should be on the high pressure side Double check this for correct position REASSEMBLING THE TYPE Ill DOUBLE BEARING SHAFT END COVER Where double outboard bearing assemblies are to be installed Pack both tapered roller bearings 6 with a No 2 consistency lit
23. r 26 DISASSEMBLY SHAFT END COVER 1 Turn the shaft end cover 26 on end so that the drive end of the shaft 24 is pointing upward With a pointed tool or thin screwdriver blade snap out the retaining ring 17 WARNING USE EYE PROTECTION 2 Pull the entire drive shaft assembly out of the shaft end cover 26 If the drive shaft is smaller than 1 diameter you will have to remove the thrust washer 25 from the base of the bearing bore separately after pulling out the drive shaft assembly 18 thru 25 for a pump with a 1 diameter drive shaft and smaller 18 32 for a pump with a drive shaft larger than 1 diameter 3 Upend the shaft end cover 26 to expose the diverter plate 36 or thrust plate Gently pry the diverter plate 36 or thrust plate away from the shaft end cover 26 using a knife blade or thin blade Screwdriver On pumps other than Permco s remove and discard the pocket seals Permco pumps require no pocket seals 4 To remove roller bearings 35 pull them out of the shaft end cover 26 using a bearing puller After bearings have been removed check bores for out of roundness and elliptical shape If more than 0 003 out of round do not use 5 a For drive shafts 1 in diameter and smaller Slip the needle bearing assembly 18 thru 20 off the drive end of the shaft 24 The two thrust bearings races 22 and thrust bearing roller 23 can now be slipped off the drive end of the drive shaft 24
24. red 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 D 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 It is recommended that all seals be replaced on any rebuild job Putting Permco diverter plates into a pump and re using the old worn parts will not necessarily re store the pump to the high efficiency and perform ance 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 It 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 circum stances you must not substitute other makes of parts in a Permco pump USE ONLY GENUINE PERMCO PARTS You can successfully use Permco diverter plates to rebuild other makes of pumps to obtain in creased operating pressures and pump life How ever read the above paragraphs carefully If you have any questions about rebuilding Permco pumps or about using Permco parts to up grade other m
25. ring and seal retainer 19 Put 0 ring 21 over small diameter of bearing and seal retainer 19 6 For double bearing units see Page 12 NOTE If you are reassembling a unit used as a MOTOR with either diameter shaft smaller or larger than 1 diameter install the special motor seal retainer 27 which combines an 0 ring 28 and a back up ring 29 in the I D of the seal retainer 27 Place 0 ring in retainer first and then install back up ring A FOR PUMP WITH DRIVE SHAFT 1 IN DIAMETER AND SMALLER 6a Put thrust washer 25 in bottom of bearing bore of shaft end cover 26 with grooves facing up 7a Put one of the two thrust bearing races 22 over drive end of drive shaft 24 so race rests against shaft shoulder Put thrust bearing roller 23 on drive shaft 24 followed by second thrust bearing race 22 Slide needle bearing 20 and 0 ring 21 on drive shaft 24 with 0 ring against outer thrust bearing race 22 NOW SKIP TO STEP 10 B FOR PUMP WITH DRIVE SHAFT LARGER THAN 1 IN DIAMETER 6b Install the complete seal retainer subassembly 18 21 Step 5 above over the drive shaft 30 seal should bear on shoulder of drive end of drive shaft 30 7b Put one of the two thrust bearing races 22 on the drive shaft 30 next to the 0 ring 21 Next slip thrust bearing roller 23 on drive shaft 30 Slide the second thrust bearing race 22 on follow with sna
26. th thrust plates the pocket seals will come out easily Permco pumps with diverter plates do not require pocket seals 5 Remove the pump drive gear 39 the driven gear 40 and the gear housing 38 from the shaft end cover 9 BE CAREFUL to keep the drive gear and driven gear together you must reassemble them as the original pair later since they have worked in together DISASSEMBLY SHAFT END COVER 9 1 Set the partially disassembled pump shaft end cover 9 from which the gear housing was separated in the vise with the pilot up The drive end of the shaft will be pointing straight up 2 Now finish unscrewing threaded retainer ring 1 loosened at the start and remove from shaft 8 or 14 3 Pull entire drive shaft assembly 2 thru 8 out of shaft end cover 9 Carefully note direction of bearing taper so bearing can be reassembled correctly 4 Turn the shaft end cover 9 pilot down the end of which the drive shaft assembly 2 thru 8 was removed Diverter plate 36 will now be accessible 5 With a knife blade or thin blade screwdriver VERY gently pry the diverter plate 36 off the bearings of the shaft end cover 9 If working on another make of pump to be refitted with PERMCO diverter plates remove and throw away the pocket seals PERMCO pumps require no pocket seals 6 With a bearing puller pull the shaft bearings 35 out of the shaft end cover 9 if you plan to replace the bearings If you pul
27. uantity To Order 4 per section 2 per section 2 per section 2 per section 2 per section 2 per section 1 per section 1 set section 1 4 4 1 1 1 1 1 2 1 1 1 1 4 1 1 1 1 Quantity To Order 1 2 per section 2 per section 2 per section 2 per section 2 per section 1 per section 1 set section 1 8 8 2 1 1 1 1 1 1 8 1 THIS PORTION OF THE PART NUMBER SHOULD BE IDENTICAL TO ORIGINAL PART NUMBER OBTAIN BY REFERRING TO UNIT CODE NUMBER CONTACT DISTRIBUTION OR PERMCO SALES DFPT 7 DISASSEMBLING TYPE I PUMP 1 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 41 gear housing 38 and shaft end cover 9 This will enable you to reassemble these parts into the same position when you put the pump back together 2 With a face spanner wrench loosen and un screw the threaded retainer ring 1 on the shaft end of the pump a couple of turns to relieve the preload on the tapered roller bearing 6 DO NOT REMOVE the retainer ring 1 entirely 3 Install the unit in a vise shaft end down 4 Remove the cap screws 43 and washers 42 at the rear of the pump that hold the port end cover 41 and the gear housing 38 together Re move the port end cover 41 and diverter plate 36 or the thrust plate The roller bearings 35 will remain intact with the port end cover 41 In pumps wi
Download Pdf Manuals
Related Search