Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual — part 1719

POWER-ASSISTED STEERING SYSTEM

2A–25

Inspection and Repair

Make all necessary adjustments, repairs, and part
replacements if wear, damage, or other problems are
discovered during inspection.

Rotor

442RS002

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.

Vane

442RS003

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.

Relief Valve

The sliding face of the valve must be free from burrs
and damage. The parts with minor scores may be
reused after 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. Bushing fitting face
must be free from damage and wear.

O-ring, Oil Seal, Snap 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
steering fully to the left; engine idle will increase. If
system fails to function properly, disconnect connector
at the pressure switch and repeat system check while
testing continuity across disconnected SW connector.

Reassembly

1. Install oil seal to front housing. Be sure to discard

used oil seal, and always use new parts for
installation.

CAUTION: When installing the oil seal, be careful
not to damage the oil seal contacting surface of the
housing.

2. Install shaft assembly.

2A–26

POWER-ASSISTED STEERING SYSTEM

3. Install the vanes to roter with curved face in contact

with the inner wall of cam.

442RS005

4. Install rotor and vanes to cam.

5. Install pin to front housing.

6. Install two new O-rings to front housing. Be sure to

discard used O-ring.

7. Install side plate.

CAUTION: When installing side plate, be careful not
to damage its inner surface. Damaged side plate
may cause poor pump performance, pump seizure
or oil leakage.

8. Install pump cartridge assembly to front housing.

9. Install snap ring to shaft end.

10. Install rear housing with a new O-ring. Be sure to

discard used O-ring. Then install bolt and tighten it
to specified torque.

Torque: 24 N·m (17 lb ft)

11. Install suction pipe with a new O-ring. Be sure to

discard used O-ring. Then install bolt and tighten it
to specified torque.

Torque: 10 N·m (87 lb in)

12. Install relief valve and spring.

13. Install connector with a new O-ring. Be sure to

discard used O-ring. Tighten the connector to
specified torque.

Torque: 59 N·m (43 lb ft)

14. Install pressure switch assembly and tighten it to

specified torque.

Torque: 18 N·m (13 lb ft)

POWER-ASSISTED STEERING SYSTEM

2A–27

Main Data and Specifications

General Specifications

Torque Specifications

E02RX004

Oil pump

Type

Vane

Operating
fluid

ATF DEXRON®–III

2A–28

POWER-ASSISTED STEERING SYSTEM

Transfer Gear Assembly

Transfer Gear Assembly and Associated Parts

441R200001

E nd O FCallo ut

Removal

1. Apply a setting mark across the universal joint

(steering shaft side) and transfer gear assembly to
reassemble the parts in their original position.

2. Remove universal joint bolt (steering shaft side).

3. Apply a setting mark across the universal joint

assembly and the transfer gear assembly to
reassemble the parts in their original position.

4. Remove universal joint bolts (both of transfer gear

assembly side and power steering unit assembly
side).

5. Loosen fixing bolts and nut and remove transfer

gear assembly with shim.

Inspection and Repair

The transfer gear assembly cannot be disassembled. If
damage or abnormal condition are found, replace the
entire transfer gear assembly.

Installation

1. Install the transfer gear assembly to the universal

joint (steering shaft side) align the setting marks
made at removal.
Then tighten the universal joint bolt.

2. Install the universal joint assembly to the power

steering unit assembly align the setting marks made
at removal.
Then temporary tighten the universal joint bolt (both
of transfer gear assembly side and power steering
unit assembly side).

3. Install the transfer gear assembly with the shim to

frame.

Torque: 54 N·m (40 lb ft)

4. Tighten the universal joint bolts to the specified

torque.

Torque: 31 N·m (23 lb ft)

Legend

(1)

Transfer Gear Assembly

(2)

Bolt, Universal Joint (Steering Shaft Side)

(3)

Fixing Bolt Nut

(4)

Shim

(5)

Universal Joint Assembly

(6)

Bolt, Universal Joint (Steering Unit Side)