Isuzu Trooper (2000 year). Service manual — part 49

2A–26

POWER ASSISTED SYSTEM

6. Install sector shaft.

D

Tape the sector shaft serrations to protect the seal
ring from damage.

D

Align the center tooth of ball nut with that of the
sector shaft.

440RS004

7. Install O-ring.
8. Install top cover assembly and tighten the fixing bolts

to specified torque.

Torque: 47 N·m (35 lb ft)

9. Adjust the backlash between the worm gear and the

ball nut.

440RS011

D

With the worm gear rotating, set it to the straight
ahead position.

D

Set the worm shaft preload to below 10kg·cm with
the sector shaft adjusting screw.

D

Measure the worm shaft preload with the worm
gear turned 450

°

both to the right and to the left.

The worm gear preload in these positions should be
0.4–0.6 N·m (4–6 kg·cm) lower than in the straight
ahead position.

D

Lock the sector shaft adjusting screw with the lock
nut.

Lock nut torque: 41 N·m (30 lb ft)

10. Apply a thin coat of power steering fluid to oil seal lip of

each part, then use installer J–26508 to install oil seal.

440RS012

11. Install back up ring and position the chamfered face

(outer circumference) towards the oil seal.

12. Install retaining ring and position the chamfered face

(outer circumference) towards the oil seal.

13. Install dust cover.

POWER ASSISTED SYSTEM

2A–27

Main Data and Specifications

General Specifications

Steering unit

Type

Integral, ball screw

Gear ratio

16.3 : 1

Torque Specifications

E03RS003

2A–28

POWER ASSISTED SYSTEM

Power Steering Pump

Power Steering Pump and Associated Parts

436RW003

Legend

(1) Hose, Suction
(2) Hose, Flexible
(3) Bolt

(4) Belt
(5) Pulley
(6) Pump Assembly

Removal

1. Drain the engine coolant.
2. Place a drain pan below the pump.
3. Remove the air cleaner duct (1) and the radiator

upper hose (2).

436RW004

POWER ASSISTED SYSTEM

2A–29

4. Remove the drive belt.
5. Remove the pulley from the power steering pump.
6. Disconnect the suction hose.
7. Disconnect the flexible hose.
8. Remove the power steering pump fixing bolt.
9. Remove the pump assembly.

CAUTION: When removing the prmp assembly, be
careful not to damage the wiring harnessunder the
pump housing.

Installation

1. Install the adjust plate and tighten the mounting bolts

to the specified torque.

Torque: 56 N·m (41 lb ft)

2. Install the pump assembly. Connect the harness

under the pump housing.

3. Tighten the fixing bolt to the specified torque.

Torque: 46 N·m (34 lb ft)

4. Connect the flexible hose, then tighten the eye bolt to

specified torque.

Torque: 54 N·m (40 lb ft)

5. Connect the suction hose.
6. Install the pulley onto the power steering pump and

tighten the nut to the specified torque.

Torque: 78 N·m (58 lb ft)

7. Install the air cleaner duct and the radiator upper

hose.

8. Refill the engine coolant.
9. Fill and bleed the power steering system. Refer to

Bleeding the Power Steering System in this section.