Prestolite Power Trim Pump
Contents
1. PRESTOLITE POWER TRIM PUMP INDEX Table of Contents Page Identification 5C 1 Specifications 5C 1 Valve Pressure Specifications 5C 1 Electrical Specifications 5C 1 Lubricants Sealers Adhesives 5C 1 Special Tools 5C 1 Description 5C 2 Thermal Circuit Breaker Operation 5C 2 Manual Release Valve Operation 5C 2 Maintaining Power Trim Pump Oil Level 5C 2 Air Bleeding Power Trim System 5C 3 Bleeding OUT UP Trim Circuit 5C 3 Bleeding IN DOWN Trim Circuit 5C 3 Testing Power Trim Pump 5C 4 Connecting Test Gauge 5C 4 Internal Restriction Test 5C 5 OUT UP Pressure Test 5C 5 IN DOWN Pressure Test 5C 5 Trim Cylinder Internal Leak Test 5C 5 Trim Cylinder Shock Piston Test 5C 7 Motor and Electrical Bench Tests 5C 7 Trim Pump Motor Test In Boat 5C 7 Trim Pump Motor Test Out of Boat 5C 8 Solenoid Test Pump in Boat 5C 9 Solenoid Test Pump Out of Boat 5C 10 110 Amp Fuse Test Pump in Boat 5C 11 110 Amp Fuse Test Pump Out of Boat 5C 12 20 Amp Fuse Test 5C 12 INDEX Page Trim Pump Removal2. 5C 13 Hydraulic Repair 5C 13 Manual Release Valve Replacement 5C 13 Disassembly 5C 13 Valve Body and Gear Assembly 5C 14 Motor Repair 5C 15 Disassembly 5C 15 Armature Tests 5C 17 Continuity Test 5C 17 Test For Shorts 5C 17 Cleaning Commutator 5C 17 Field Test 5C 17 Test For Open Circuit 5C 17 Test For Short In Field 5C 18 Thermal Switch Test 5C 18 Continuity Test 5C 18 Brush Lead Tests 5C 18 Brush Replacement 5C 19 Brush Replacement 5C 19 End Cap And Brush Assembly Replacement 5C 19 Reassembly 5C 20 Trim Pump Installation 5C 22 Wiring Diagram 5C 23 90 12934 2 1097 Identification Some MerCruiser Sterndrives will be equipped with a Prestolite Power Trim pump This pump was used interchangeably with the Oildyne pump for a period of time 90524 Prestolite Power Trim Pump 90 12934 2 1097 INDEX Specifications Valve Pressure Specifications es 2200 2600 PSI 2 400 600 PSI Electrical Specifications 115 Amps at Pump Amperage Draw 2200 2600 PSI
3. d 50521 IN DOWN Solenoid Positive Terminal GREEN WHITE Harness Wire Terminal Jumper Wire QOO 9 3 If motor does not run in one direction or another replace appropriate solenoid See Wiring Dia gram at end of this section for wire connection points 5C 10 PRESTOLITE POWER TRIM PUMP INDEX Solenoid Test Pump Out of Boat DO NOT perform this test near flammables or ex plosives as a spark may occur when making connections 1 Remove trim pump from boat Refer to Trim Pump Removal See Table of Contents Remove fluid from trim pump reservoir 3 OUT UP Solenoid a Connect 12 volt positive supply lead to BLUE WHITE harness wire terminal b Connect negative supply lead to solenoid ground terminal c Connect ohmmeter leads to large terminals on solenoid 50521 OUT UP Solenoid 12 Volt Positive Supply Lead Negative Supply Lead Ohmmeter Leads QOO 9 4 Zero Ohms Reading Full Continuity Sole noid is OK High Ohms Reading No Continuity Replace solenoid 90 12934 2 1097 5 IN DOWN Solenoid 2 Check for voltage at terminal 2 using volt me a Connect 12 volt positive supply lead to ter GREEN WHITE harness wire terminal Voltage Indicated Fuse OK Voltage Not Indicated Replace fuse b Connect negative supply lead to solenoid ground terminal c Connect ohmmeter leads to large terminals on solenoid
4. a Connecta 12 volt positive supply lead to BLUE WHITE motor lead terminal b Connect the negative supply lead to a good ground on pump c Motor should run 90523 a OUT UP Solenoid b 12 Volt POSITIVE Supply Lead c NEGATIVE Supply Lead 90 12934 2 1097 4 IN DOWN Operation a Connect a 12 volt positive supply lead to GREEN WHITE motor lead terminal b Connect the negative supply lead to a good ground on pump c Motor should run 90524 a IN DOWN Solenoid b 12 Volt POSITIVE Supply Lead c NEGATIVE Supply Lead NOTE If motor does not run refer to Motor Repair 90 12934 2 1097 INDEX Solenoid Test Pump in Boat DO NOT perform this test near flammables or ex plosives as a spark may occur when making connections CAUTION Remain clear of drive unit when performing pow er trim pump motor tests with pump in boat and hydraulic hose connected 1 UP OUT Solenoid a Connect jumper wire between positive so lenoid terminal and BLUE WHITE harness wire terminal b Motor should run ng lt eee efa gic ergs 50521 OUT UP Solenoid Positive Terminal BLUE WHITE Harness Wire Terminal Jumper Wire QOO 9 PRESTOLITE POWER TRIM PUMP 5C 9 2 IN DOWN Solenoid a Connect a jumper wire between positive solenoid terminal and GREEN WHITE har ness wire terminal b Motor should run
5. a S 90523 a Volt Meter Negative Lead b Volt Meter Positive Lead 50521 Fuse IN DOWN Solenoid 12 Volt Positive Supply Lead Negative Supply Lead Ohmmeter Leads QOO 9 6 Zero Ohms Reading Full Continuity Sole noid is OK High Ohms Reading No Continuity Replace solenoid oee Wiring Diagram at the end of this section for wir ing connection points 110 Amp Fuse Test Pump in Boat DO NOT perform this test near flammables or ex plosives as a spark may occur when making connections 1 Check for voltage at terminal 1 using a volt me a Volt Meter Negative Lead ter Voltage MUST BE indicated before proceed i eiveli Meise Pacive eed ing with next check 90 12934 2 1097 INDEX PRESTOLITE POWER TRIM PUMP 5C 11 110 Amp Fuse Test Pump Out of 20 Amp Fuse Test Boat 1 Connect ohmmeter leads between terminals on fuse 1 Remove fuse from fuse holder ZEro Ohms Reading Full Continuity Fuse OK HIGH OHMS READING No Continuity Replace fuse AUN n im 90521 a Fuse Holder 2 Connect ohmmeter one lead to each end of fuse Zero Ohms Reading Full Continuity Fuse a 110 Amp Fuse OK b Ohmmeter Leads HIGH OHMS READING No Continuity Replace fuse 22497 a 20 Amp Fuse b Ohmmeter Leads 5C 12 PRESTOLITE POWER TRIM PUMP INDEX 90 12934 2 1097 Trim Pump Removal 1 Disconnect trim
6. 1 Place drive unit in the full IN DOWN position 2 Remove Fill screw from pump Oil level should be up to bottom of the threads in Fill screw hole If necessary add Quicksilver Power Trim and Steering Fluid or SAE 10W 30 or 10W 40 motor oil through Fill screw hole NOTE In tropical areas single viscosity SAE 30 tor oil can be used 50524 a Fill Screw Vent Screw c Manual Release Valve 3 Raise and lower drive unit 6 to 10 times to purge any air from system then recheck oil level with drive unit fully IN DOWN and add oil if necessary 90 12934 2 1097 Air Bleeding Power Trim System The power Trim System will purge itself of a small amount of air by raising and lowering the drive unit several times However if a rebuilt trim cylinder is being installed which has not been filled with oil the following bleeding procedure should be used to remove the air from the system Bleeding OUT UP Trim Circuit 1 Fill pump reservoir to proper level as explained preceding Trim cylinder must be compressed 2 Disconnect OUT UP hose from front connection on trim cylinder If both cylinders were rebuilt dis connect hoses from both cylinders 3 Direct end of trim hose s into a container Run trim pump in the UP direction until a solid air free stream of fluid is expelled from hose s Re connect hose s and tighten securely 5 Refill trim pump to proper level g
7. 15173 17932 kPa Lubricants Sealers Adhesives ____ ___ i dg Trim and Steering 92 90100A12 2 4 C Marine Lubricant 92 825407A2 Liquid Neoprene 92 25711 2 Special Tools Description PatNo Test Gauge Kit 91 52915A6 Multi Meter 91 99750 Torque Wrench Ib ft 91 36210 Torque Wrench Ib in 91 66274 Obtain Locally PRESTOLITE POWER TRIM PUMP 5C 1 Description The Prestolite Power Trim Pump has internal valving that eliminates the need for an external reverse lock as was required in the past The pump generates a higher volume of fluid but at a lower pressure than previous Prestolite pumps This in conjunction with large 1 0 hydraulic hoses gimbal housing to pump and larger I D trim cylinders should allow the drive unit to kick up easier if an underwater object is struck CAUTION Due to differences in internal valving the new Prestolite trim pump cannot be used to replace an earlier Prestolite pump or vice versa Use of incorrect pump will affect trim operation and may cause damage to trim system The pump motor is protected from overheating by an internal circuit breaker on commutator end plate that interrupts the current flow through the field wind ings in the event of an overheating condition Electri cal current overload protection is provided to the pump by a 110 amp fuse Pump also is fitted with a 20 amp in line fuse which serves to protect the
8. And Gear Assembly c Seal Not Seen 5C 16 PRESTOLITE POWER TRIM PUMP INDEX 90 12934 2 1097 Armature Tests CONTINUITY TEST 1 Check armature for continuity Set ohmmeter on Rx1 scale Connect leads as shown Continuity Indicated Armature is grounded re place armature Continuity Not Indicated Armature is OK a Ohmmeter Meter Lead Place On Armature Shaft c Meter Lead Place On All Commutator Bars One At A Time TEST FOR SHORTS 1 Check armature on a growler follow growler manufacturers instructions Indication of a short requires replacement CLEANING COMMUTATOR NOTE If commutator is worn it can be turned down on a lathe or an armature conditioner tool INDEX 90 12934 2 1097 1 Clean commutator with 00 garnet grit sandpa per DO NOT use emery paper 2 Check gaps between commutator bars for mate rial Remove material if present DSS Lp MS 90520 a Commutator b Gap Field Test TEST FOR OPEN CIRCUIT 1 Set ohmmeter to Rx1 scale and connect meter leads between field leads Zero Ohms Indicated Full Continuity Field OK Zero Ohms Not Indicated No Continuity Replace field assembly 50461 Ohmmeter b Meter Leads Connect Between Field Leads c Field Leads PRESTOLITE POWER TRIM PUMP 5C 17 TEST FOR SHORT IN FIELD 1 Set ohmmeter on Rx1 scale Connect ohmmeter between field brush lead and field
9. Test IMPORTANT The following test assumes that pump OUT UP pressure is within specifications as determined by performing Power Trim Pump Test 1 Reconnect trim cylinder hoses if removed in previous test as follows a Remove plugs and caps b Install UP hose to forward hole on hydraulic connector Tighten securely c Install DOWN hose to aft hole on hydraulic connector Tighten securely 22090 UP Hose DOWN Hose c Hydraulic Connector O PRESTOLITE POWER TRIM PUMP 5C 5 2 Connect gauge at most convenient location jun Jum Ss Sy pl T La TI m R d A 77 B Fr d o xDD Ze 74 E 26345 Gauge Connected at Pump a Hydraulic Test Gauge 91 52915A3 b Fitting 22 77366 c Fittings Supplied with Gauge d Black Hydraulic Hose From Gimbal Housing e Gray Hydraulic Hose From Gimbal Housing 22126 Gauge Connected to Hydraulic Connector a Test Gauge b Coupling Supplied with Gauge c Front Hydraulic Connector Port 5C 6 PRESTOLITE POWER TRIM PUMP INDEX 3 Open Valve A and B and run pump OUT UP and IN DOWN several times to purge 4 Run pump OUT UP until trim cylinders are fully extended then observe gauge while pumping Pressure should be 2200 2600 psi 15173 17932 kPa 5 Stop pumping OUT UP Pressure should not fall below 1900 psi 13104 kPa If readings are not
10. pump battery leads from battery negative lead first 2 Disconnect trim harness connector 3 pronged from trim pump 3 Remove hydraulic hoses from trim pump Cap end of hoses 4 Remove lag bolts and washers and lift pump and floor bracket from boat 50524 Positive Battery Lead Negative Battery Lead Harness Connector Black Hydraulic Hose UP Hose Gray Hydraulic Hose DOWN Hose 90 12934 2 1097 Hydraulic Repair Manual Release Valve Replacement NOTE Replacement of manual release valve can be completed without removing the trim pump from boat Before loosening the manual release valve make sure all people are clear of drive unit as drive unit will drop to full INJDOWN position when valve is loosened Slowly turn manual release valve counterclockwise to remove To install new valve turn valve clockwise until it seats 50461 a O ring b Rubber Seal Disassembly CAUTION Work area must be dirt and lint free The slightest amount of dirt in hydraulic system can cause pump malfunction 1 Disconnect trim motor wires amp Mr Nar On NP J om 50520 a BLUE WHITE Motor Wire b GREEN WHITE Motor Wire c BLACK Ground Wires PRESTOLITE POWER TRIM PUMP 5C 13 2 Remove mounting bolts and remove trim pump Valve Body and Gear Assembly from floor bracket 1 Place pump in a container to catch oil when val
11. within specifications in ternal trim cylinder leak is indicated Use the fol lowing procedure to locate faulty cylinder a If gauge is connected at pump reconnect gauge at gimbal housing hydraulic connec tor Repeat Step 2 then run pump in OUT UP direction until trim cylinder are fully ex tended b Close Valve B on test gauge and repeat Steps 3 and 4 If Readings Are Now Within Specifications Trim cylinder on the same side that test gauge is con nected is faulty If Readings Are Still Not Within Specifications Trim cylinder on the opposite side from where the test gauge is connected is faulty 90 12934 2 1097 Trim Cylinder Shock Piston Test If trim system checks out good but drive unit will not trim IN DOWN problem may be due to a leaky trim cylinder shock piston Use the following test to check for this condition Test gauge is not required 1 Run pump in OUT UP direction until trim cylin ders are fully extended 2 Prevent trim cylinder piston rods from retracting using a Suitable device Quicksilver Trailering Kit works well for this purpose a Trailering Clip 3 Disconnect UP trim hose from trim cylinders A C f gt NYAS R ENUAN ZEEE CONO E et YTS NE 7 VA 22089 UP Trim Hose b Front Connection 4 Run pump in IN DOWN direction If oil flows from UP port on trim cylinder shock piston is leaking and must be r
12. 2 PRESTOLITE POWER TRIM PUMP INDEX 90 12934 2 1097 276902 3 331S na v 3 3315 und GION3 IOS NMOG 3503 dV Oc Audllva8 LIOA cL JOHLNOO WIH L H3MOd iagram D iring W PRESTOLITE POWER TRIM PUMP 5C 23 INDEX 90 12934 2 1097 THIS PAGE IS INTENTIONALLY BLANK 5C 24 PRESTOLITE POWER TRIM PUMP INDEX 90 12934 2 1097
13. 77366 NOTE Extension hoses MUST BE used to obtain ac curate readings 26344 a Hydraulic Test Gauge 91 52915A6 b Gimbal Housing Hydraulic Connector 5C 4 PRESTOLITE POWER TRIM PUMP INDEX 22090 Gauge Connect to Hydraulic Connector Caps Plugs 4 Open Valve A and B and run pump UP and DOWN several times to purge air 90 12934 2 1097 Internal Restriction Test 1 Open valve A and B 2 Run pump OUT UP and IN DOWN while observ ing gauge 3 Replace adapter if pressure is in excess of 200 psi 1379 kPa OUT UP Pressure Test Leave Valve A open and close Valve 2 Run pump OUT UP while observing gauge Heading should be 2200 2600 psi 15173 17932 kPa If not replace valve body and gear assembly 3 Stop pumping OUT UP Pressure should not fall below 1900 psi 13104 kPa If it does check for and or replace following External oil leaks Valve Body and Gear Assembly IN DOWN Pressure Test 1 Close Valve A and open Valve B 2 Run pump IN DOWN while observing gauge Reading should be 400 600 psi 2759 4138 kPa If not replace valve body and gear assembly 3 Stop pumping IN DOWN Pressure should not fall below 350 psi 2410 kPa If it does check for and or replace the following External oil leaks Valve Body and Gear Assembly INDEX 90 12934 2 1097 Trim Cylinder Internal Leak
14. 97 5 Align motor shaft with gear assembly 7 Install solenoid plate and connector and harness es Solenoid Plate Nut Screws Solenoids Spacer Connector And Harness pooo o a Motor Shaft b Gear Assembly 6 Install valve body and gear assembly 8 Secure trim pump motor leads to solenoids S ey a Screws 8 b Valve and Gear Assembly New Seal Not Seen a Blue Lead Connect to OUT UP Solenoid b Green Lead Connect to IN DOWN Solenoid c OUT UP Solenoid d IN DOWN Solenoid 90 12934 2 1097 INDEX PRESTOLITE POWER TRIM PUMP 5C 21 9 Install trim pump on floor bracket Tighten Trim Pump Installation securely 1 Secure pump and mounting bracket to boat using lag bolts and washers 2 Reconnect trim hoses to pump Black hose to left connection gray hose to right connection DO NOT cross thread or overtighten hose fittings Torque to 70 150 Ib in 7 9 16 9 Nem 3 Reconnect trim harness connector to trim pump _ Reconnect battery leads to battery 5 Check fluid level and fill if necessary Refer to S eS Maintaining Power Trim Pump Oil Level in this SN section A I 50522 a Trim Pump b Floor Bracket c Screws and Lock Washers 50524 Positive Battery Lead Negative Battery Lead Harness Connector Black Hydraulic Hose UP Hose Gray Hydraulic Hose DOWN Hose o0oaQaqd o 9 5C 2
15. eplaced 90 12934 2 1097 INDEX Motor and Electrical Bench Tests Trim Pump Motor Test In Boat DO NOT perform this test near flammables or ex plosives as a spark may occur when making connections Remaln clear of drive unit when performing pow er trim pump motor tests with pump in the boat and hydraulic hoses connected 1 OUT UP Operation a Connect a jumper wire between positive solenoid terminal and BLUE WHITE motor lead terminal b Motor should run TT LS nat ay re a X imi e Mrs ASA he etr a SA i UN Ur 63 a Jr oe Ma E 274 50523 OUT UP Solenoid POSITIVE Terminal BLUE WHITE Motor Lead Terminal Jumper Wire QOO 9 PRESTOLITE POWER TRIM PUMP 5C 7 2 IN DOWN Operation a Connect a jumper wire between positive solenoid terminal and GREEN WHITE motor lead terminal b Motor should run 50523 a IN DOWN Solenoid b POSITIVE Terminal c GREEN WHITE Motor Lead Terminal d Jumper Wire 3 If motor does not run refer to Motor Repair See Table of Contents Trim Pump Motor Test Out of Boat DO NOT perform this test near flammables or ex plosives as a spark may occur when making connections 1 Remove trim pump from boat Refer to Trim Pump Removal See Table of Contents 2 Remove fluid from trim pump reservoir 5C 8 PRESTOLITE POWER TRIM PUMP INDEX 3 OUT UP Operation
16. frame Zero Ohms Indicated full continuity Short indicated Replace field assembly Zero Ohms Not Indicated no continuity Field OK 50461 Meter Lead Place On Positive Brush Holder Lead Meter Lead Place On Frame Field Lead Thermal Switch Test QOO 9 CONTINUITY TEST 1 Test thermal circuit breaker for continuity using ohmmeter set on Rx1 scale Zero Ohms Indicated Full Continuity Thermal switch OK Zero Ohms Not Indicated No Continuity Replace thermal switch 26507 a Place Meter Lead At This Point b Place Meter Lead At Ground 5C 18 PRESTOLITE POWER TRIM PUMP INDEX Brush Lead Tests 1 Set ohmmeter on Rx1 scale Connect leads as shown Test positive brush lead for ground Continuity Indicated Grounded condition replace end plate assembly No continuity Brush lead OK 50460 Ohmmeter Meter Lead Place On Positive Brush Lead Meter Lead Place On End Cap oO O 9 2 Set ohmmeter on rx1 scale Connect leads as shown Test negative brush lead for an open condition Continuity Indicated Brush lead OK Continuity NOT Indicated Inspect lead for a poor connection 50460 Ohmmeter Meter Lead Place On Negative Brush Lead Meter Lead Place On End Cap Positive Brush Lead OO 9 90 12934 2 1097 Brush Replacement END CAP AND BRUSH ASSEMBLY Inspect brushes and replace if REPE EMEN i j 1 Cut off fie
17. ld to positive brush holder lead as close e Pitted to brush holder as possible Chipped 2 Using 70 30 tin lead alloy rosin core solder solder field lead to brush holder new e Brush is less than 1 4 in 6mm long e Leads are fraying BRUSH REPLACEMENT 1 Cut brush leads off as close to brush holders as possible 2 Using 70 30 tin lead alloy rosin core solder sol der new brushes to brush holders a Field Lead b Positive Brush Holder c End Cap a Brush Leads b Brush Holders 90 12934 2 1097 INDEX PRESTOLITE POWER TRIM PUMP 5C 19 Reassembly NOTE Brush holder tool can be made as shown 5 16 we 1 3 4 44 5mm 5 16 7 9mm e 1 2 12 7mm 3 76 2mm 26507 3 Spread brushes with brush holder tool and install end plate over armature Secure end cap with nuts and washers 1 Install armature and washers 1 25 4mm 3 8 9 5mm 26506 a Large Washer b Small Washer s Armature d Reservoir e Long Stud f Sleeve 1 g Small Stud h Connector And Harness Holder 2 Install field and frame assembly Align index mark on field and frame assembly with mark on reservoir a End Plate 4 Ensure seal is in place in reservoir oe T 50459 a Index Marks Align b Field And Frame Assembly c Reservoir a Seal 5C 20 PRESTOLITE POWER TRIM PUMP INDEX 90 12934 2 10
18. m a 22089 a OUT UP Trim Hose b Front Connection on Trim Cylinder 90 12934 2 1097 INDEX Oo O 9 Bleeding IN DOWN Trim Circuit Ensure pump reservoir is filled to proper level Disconnect IN DOWN hose from rear connection on gimbal housing hydraulic connector If both cylinders were rebuilt disconnect hoses from both sides of hydraulic connector Plug holes in hydraulic connector using plug 22 38609 or suitable device Direct end of trim hose s into container Run trim pump in the UP direction until trim cylin ders are fully extended Remove plug s from gimbal housing hydraulic connector and momentarily run trim pump in the IN DOWN direction until a solid air free stream of fluid is expelled from rear hole s in hydraulic connector Reconnect trim hose s and tighten securely Lower drive unit to the full IN DOWN position and refill trim pump to proper level Run trim system IN DOWN and OUT UP several times and re check fluid level 22089 IN DOWN Trim Hose Hydraulic Connector Plug 22 38609 PRESTOLITE POWER TRIM PUMP 5C 3 Testing Power Trim Pump Connecting Test Gauge 1 Check trim pump oil level Fill if necessary Place drive unit in the full IN DOWN position Connect test gauge at the most convenient loca tion at pump or hydraulic connector A A ur B FI Gauge Connected at Pump a Hydraulic Test Gauge 91 52915A6 b Extension Hoses 91 52915A6 c Fittings 22
19. trim control and harness from an overload Thermal Circuit Breaker Operation If the IN DOWN or Trailer switch is kept depressed after drive unit reaches its end of travel a thermal circuit breaker will open to prevent pump motor from overheating and pump motor will stop Release switch es as soon as drive unit reaches end of travel to prevent this from happening If circuit breaker should open allow motor to cool down and circuit breaker will automatically reset Manual Release Valve Operation Before loosening manual release valve make sure all persons are clear of sterndrive unit In case of a Power Trim system malfunction the sterndrive unit can be raised and lowered manually by turning the manual release valve counterclockwise approximately 3 turns and moving drive unit to desired position by hand After drive unit has been placed in the desired position close valve COMPLETELY Power Trim system will not function properly unless valve is completely closed 5C 2 PRESTOLITE POWER TRIM PUMP INDEX Maintaining Power Trim Pump Oil Level CAUTION Vent screw MUST BE backed out two 2 full turns after bottoming out to vent pump reservoir FAILURE TO BACK SCREW OUT COULD RE SULT IN DAMAGE TO PUMP IMPORTANT Check oil level with sterndrive unit in the full down position IMPORTANT SAE 10W 30 or 10W 40 engine oil can be used in system if Quicksilver Power Trim and Steering Fluid is not available
20. ve body and gear assembly is removed 2 Remove valve body gear assembly and seal 50460 Screws 8 b Valve Body And Gear Assembly Trim Pump Floor Bracket Mounting Bolts 3 Remove solenoids if replacement is necessary b ffc ES d SESE OXON Tas AUI 90520 Seal A 50520 UP Solenoid b DOWN Solenoid c Mounting Bolts 2 On Each Solenoid 5C 14 PRESTOLITE POWER TRIM PUMP INDEX 90 12934 2 1097 3 Install new seal in reservoir o Install valve body and gear assembly a Screws 8 b Valve Body And Gear Assembly New Seal Not Seen Motor Repair Disassembly 1 Disconnect trim pump motor leads 50522 a Motor Shaft b Gear Assembly a Trim Pump Motor Leads b Solenoids 90 12934 2 1097 INDEX PRESTOLITE POWER TRIM PUMP 5C 15 2 Remove solenoid plate and connector and 4 Remove motor assembly NAT Z Ps SK AA lenis A OA uy N f eee gt aa BEN 50459 a Solenoid Plate b Nut Screws d Solenoids e Spacer f Connector and Harness 26506 3 Remove valve body and gear assembly a Nut And Washer 2 b End Plate Assembly c Field and Frame Assembly d Armature e Small Thrust Washer s f Large Thrust Washer g Spacer 1 h Studs 2 Reservoir a Screws 8 b Valve Body
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