Inspection And Repair - Isuzu 2000 Trooper Workshop Manual

15. Remove the bolt.
16. Remove the rear housing assembly and the pump
cartridge.
17. Remove the gasket.
18. Remove the O-ring.
19. Remove the O-ring.
20. Remove the front housing.
21. Remove the side plate.
22. Remove the rotor and vane.
23. Remove the cam.
24. Remove the pin.
25. Remove the rear housing.
26. Remove the pressure switch.

Inspection and Repair

Make all necessary adjustments, repairs, and part
replacements if wear, damage, or other problems are
discovered during inspection.
Rotor
Check that the groove in the vane is free from excessive
wear and that the vane slides smoothly. When part
replacement becomes necessary, the pump cartridge
should be replaced as a subassembly.
POWER ASSISTED SYSTEM
Vane
Sliding faces of the vane should be free from wear.
(Particularly the curved face at the tip that contact with the
cam should be free from wear and distortion). When part
replacement becomes necessary, the pump cartridge
should be replaced as a subassembly.
Cam
The inner face of the arm should have a uniform contact
pattern without a sign of step wear. When part
replacement becomes necessary, the pump cartridge
should be replaced as a subassembly.
Side Plate
The sliding faces of parts must be free from step wear
(more than 0.01 mm), which can be felt by the finger nail.
The parts with minor scores may be reused after lapping
the face.
Valve
The sliding face of the valve must be free from burrs and
damage. The parts with minor scores may be reused after
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smoothing with emery cloth (#800 or finer).
Shaft
Oil seal sliding faces must be free from a step wear which
can be felt by the finger nail. Needle bearing fitting face
must be free from damage and wear.
O-ring, Oil Seal, Retaining Ring
Be sure to discard used parts, and always use new parts
for installation. Prior to installation, lubricate all seals and
rings with power steering fluid.
Pressure Switch
Check the switch operation as follows:
With engine idling and A/C on, turn the steering wheel
fully to the left; compressor should interrupt and engine
idle speed will increase. Shut off A/C and again turn
2A–31
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