1998 ISUZU TROOPER power steering

2A – 34 POWER STEERING
REASSEMBLY
28. Rear Housing
27. Pin
26. Cam
25. Rotor and Vane
Install the rotor with its punch mark facing the front
housing.
Install the vane with curved face in contact with the
inner wall of the cam.
24. Pressure Plate
CAUTION:
When install pressure plate, be careful not to damage its
inner surface. Damaged pressure plate may cause poor
pump performance, pump seizure or oil leakage.
23. Front Housing
22. O-ring
Be sure to discard used parts, and always used new
parts for installation.
21. O-ring
Be sure to discard used parts, and always used new
parts for installation.
20. Gasket
Be sure to discard used parts, and always used new
parts for installation.
19. Rear Housing Assemble and Pump Cartridge
18. Bolt
Rear Housing Bolt Torque N·m (kg·m/lb·ft)
54 (5.5 / 40)
17. O-ring
Be sure to discard used parts, and always used new
parts for installation.

POWER STEERING 2A – 35
CAUTION:
When install pressure plate, be careful not to damage its
inner surface. Damaged pressure plate may cause poor
pump performance, pump seizure or oil leakage.
16. Retaining Ring
15. Shaft
14. Bearing
13. Shaft Assembly
12. Retaining Ring
11. Spring
10. Filter
9. Retaining Ring
8. Valve
7. O-ring
Be sure to discard used parts, and always used new
parts for installation.
6. Connector
Connector Torque N·m (kg·m/lb·ft)
54 (5.5 / 40)
5. O-ring
Be sure to discard used parts, and always used new
parts for installation.
4. O-ring
Be sure to discard used parts, and always used new
parts for installation.
3. O-ring
Be sure to discard used parts, and always used new
parts for installation.
2. Pipe, Suction
1. Bolt
Suction Pipe Bolt Torque N·m (kg·m/lb·ft)
21 (2.1 / 15)

2A – 36 POWER STEERING
POWER STEERING PUMP (4JX1 Engine Model)
17 1 18 227654
3 2
19
20 2115
14
16
8
10
12
11
13 9
23
Disassembly Steps
1. O-ring
2. Pipe, suction
3. O-ring
4. Connector
5. O-ring
6. Valve
7. Spring
8. Bolt
9. Rear housing assembly
10. O-ring
11. Pump cartridge
12. Cam13. Rotor and vane
14. Pressure plate
15. O-ring
16. O-ring
17. Gear
18. Retaining ring
19. Shaft assembly
20. Bearing
21. Shaft
22. Oil seal
23. Front housing
Reassembly Steps
23. Front housing
22. Oil seal
21. Shaft
20. Bearing
19. Shaft assembly
18. Retaining ring
17. Gear
16. O-ring
15. O-ring
14. Pressure plate
13. Rotor and vane
12. Cam11. Pump cartridge
10. O-ring
9. Rear housing assembly
8. Bolt
7. Spring
6. Valve
5. O-ring
4. Connector
3. O-ring
2. Pipe, suction
1. O-ring
412RW048

POWER STEERING 2A – 37
DISASSEMBLY
Preparation:
Clean oil pump with solvent (plug the discharge and
suction port to prevent the entry of solvent). Be careful not
to expose the oil seal of shaft assembly to solvent.
1. O-ring
2. Pipe, Suction
3. O-ring
4. Connector
5. O-ring
6. Valve
7. Spring
8. Bolt
9. Rear Housing Assembly
10. O-ring
11. Pump Cartridge
12. Cam
13. Rotor and Vane
14. Pressure Plate
15. O-ring
16. O-ring
17. Gear
18. Retaining Ring
19. Shaft Assembly
20. Bearing
21. Shaft
22. Oil seal
CAUTION:
When removing the oil seal, be careful not to damage the
housing.
23. Front Housing

2A – 38 POWER STEERING
REASSEMBLY
23. Front Housing
22. Oil Seal
Be sure to discard used parts, and always used new
parts for installation.
21. Shaft
20. Bearing
19. Shaft Assembly
18. Retaining Ring
17. Gear
16. O-ring
Be sure to discard used parts, and always used new
parts for installation.
15. O-ring
Be sure to discard used parts, and always used new
parts for installation.
14. Pressure Plate
CAUTION:
When install pressure plate, be careful not to damage its
inner surface. Damaged pressure plate may cause poor
pump performance, pump seizure or oil leakage.
13. Rotor and Vane
Install the vane with curved face in contact with the
inner wall of the cam.
12. Cam
11. Pump Cartridge
10. O-ring
Be sure to discard used parts, and always used new
parts for installation.
9. Rear Housing Assembly
8. Bolt
Rear Housing Bolt Torque N·m (kg·m/lb·ft)
24 (2.4 / 17)

POWER STEERING 2A – 39
7. Spring
6. Valve
5. O-ring
Be sure to discard used parts, and always used new
parts for installation.
4. Connector
Connector Torque N·m (kg·m/lb·ft)
59 (6.0 / 43)
3. O-ring
Be sure to discard used parts, and always used new
parts for installation.
2. Pipe, Suction
Suction Pipe Bolt Torque N·m (kg·m/lb·ft)
9.8 (1.0 / 7.1)
1. O-ring
Be sure to discard used parts, and always used new
parts for installation.

2A – 40 POWER STEERING
MEMO

This steering wheel and column repair section
covers the Supplemental Restraint System (SRS)
steering column. The following repair procedures
are specific to SRS Components. When servicing a
vehicle equipped with Supplemental Restraint
System, pay close attention to all WARNINGS and
CAUTIONS.
For detailed explanation about SRS, refer to Section
9J "SUPPLEMENTAL RESTRAINT SYSTEM (SRS)"
of manual.
The steering column has three important features in
addition to the steering function:
1. The column is energy absorbing, designed to
compress in a front-end collision to minimize
the possibility of injury to the driver of the
vehicle.
2. The ignition switch and lock are mounted
conveniently on the column.
3. With the column mounted lock, the ignition
and steering operation can be locked to
prevent theft of the vehicle.
The column may be disassembled and
reassembled. To insure the energy absorbing
action, it is important that the specified screws,
bolts and nuts be used only as designated and that
they are tightened to the specified torque.
When the column is removed from the vehicle, a
sharp blow on the end of steering shaft or shift
lever, leaning on the column assembly, or dropping
the assembly could shear or loosen the fasteners
that maintain column rigidity.
WARNING
THIS VEHICLE HAS A SUPPLEMENTAL RE-
STRAINT SYSTEM (SRS).REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW
IN ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN
YOU ARE PERFORMING SERVICE ON OR NEAR
THE SRS COMPONENTS OR THE SRS WIRING,
REFER TO THE SRS SERVICE INFORM ATION.
FAILURE TO FOLLOW WARNINGS COULD RE-
SULT IN POSSIBLE AIR BAG DEPLOYMENT,
PERSONAL INJURY, OR OTHERWISE UN-
NEEDED SRS SYSTEM REPAIRS.
SAFE HANDLING OF INFLATOR MODULES
REQUIRES FOLLOWING THE PROCEDURES
DESCRIBED BELOW FOR BOTH LIVE AND
DEPLOYED MODULES.
SAFETY PRECAUTIONS MUST BE FOLLOWEDWHEN HANDLING A DEPLOYED AIR BAG AS-
SEMBLY (AIR BAG). AFTER DEPLOYMENT,
THE AIR BAG ASSEMBLY (AIR BAG) SURFACE
MAY CONTAIN A SMALL AMOUNT OF SODIUM
HYDROXIDE, A BY-PRODUCT OF THE DEPLOY-
MENT REACTION, THAT IS IRRITATING TO THE
SKIN AND EYES.MOST OF THE POWDER ON
THE AIR BAG ASSEMBLY (AIR BAG) IS HARM-
LESS. AS A PRECAUTION, WEAR GLOVES
AND SAFETY GLASSES WHEN HANDLING A
DEPLOYED AIR BAG ASSEMBLY, AND WASH
YOUR HANDS WITH MILD SOAP AND WATER
AFTERWARDS.
WHEN CARRYING A LIVE AIR BAG ASSEMBLY,
MAKE SURE THE BAG AND TRIM COVER ARE
POINTED AWAY FROM YOU. NEVER CARRY
AN AIR BAG ASSEMBLY BY THE WIRES OR
CONNECTOR ON THE UNDERSIDE OF MODULE.
IN THE CASE OF AN ACCIDENTAL DEPLOY-
MENT, THE BAG WILL THEN DEPLOY WITH
MINIMAL CHANCE OF INJURY. WHEN PLACING
A LIVE AIR BAG ASSEMBLY ON A BENCH OR
OTHER SURFACE, ALWAYS FACE THE BAG AND
TRIM COVER UP, AWAY FROM THE SURFACE.
NEVER REST A STEERING COLUMN ASSEMBLY
ON THE STEERING WHEEL WITH THE AIR
BAG ASSEMBLY FACE DOWN AND COLUMN
VERTICAL.THIS IS NECESSARY SO THAT A
FREE SPACE IS PROVIDED TO ALLOW THE AIR
BAG ASSEMBLY TO EXPAND IN THE UNLIKELY
EVENT OF ACCIDENTAL DEPLOYMENT. OTHER-
WISE, PERSONAL INJURY COULD RESULT.
TO AVOID DEPLOYMENT WHEN TROUBLE
SHOOTING THE SRS SYSTEM, DO NOT USE
ELECTRICAL TEST EQUIPMENT, SUCH AS
BATTERY-POWERED OR A/C-POWERED VOLT-
METER, OHMMETER, ETC., OR ANY TYPE OF
ELECTRICAL EQUIPMENT OTHER THAN SPECI-
FIED IN THIS MANUAL. DO NOT USE A NON-
POWERED PROBE-TYPE TESTER.
INSTRUCTIONS IN THIS MANUAL MUST BE
FOLLOWED CAREFULLY, OTHERWISE PER-
SONAL INJURY MAY RESULT. 2A – 52 SUPPLEMENTAL RESTRAINT SYSTEM STEERING WHEEL & COLUMN
GENERAL DESCRIPTION