Isuzu N-Series. Manual - part 125

POWER STEERING 3B1-19

Side Cover and Sector Shaft Assembly

Disassembly

If the sector shaft is going to be fixed on the bench vice
during disassembly, be sure to protect the sector shaft
with cloth or other soft material.

1. Side Cover

Gradually turn the adjuster screw (1) clockwise,
and the side cover assembly will be lifted. Thus,
you can separate the side cover assembly (2) from
the sector shaft assembly (3).

2. O-ring
3. Back Up Ring

Legend

1. Side cover assembly

5. Sector shaft assembly

2. O-ring

6. Retainer

3. Back up ring

7. Adjuster screw

4. Y-gasket

N3A0453E

N3A0454E

3B1-20 POWER STEERING

4. Y-Gasket

Using needle, scriber or equivalent.

5. Sector Shaft Assembly

Unless otherwise a problem, it is not necessary to
disassembly.

6. Retainer

1) Raise the two lips of the retainer.

2) Using retaining bar.

7. Adjuster Screw

Inspection and Repair

Refer to “Power Steering Unit” in this section.

Reassembly

1. Adjuster Screw
2. Retainer

Discard used retainer and install a new one.
Install and fully tighten the retainer and back off
180 degrees.

Retighten to a torque of 39 N (4 kg /44 lb) and back
off 20 degrees. Check that the adjuster screw turns
smoothly.

Caulk the retainer in position.

3. Sector Shaft Assembly
4. Y-Gasket

Install the gasket so that its lip faces to the bearing.
If the lip is deformed, correct.
Apply grease to Y-gasket.

5. Back Up Ring

When the back up ring is installed, use installer for
alignment.

N3A0147E

N3A0148E

N3A0148E

N3A0147E

POWER STEERING 3B1-21

6. O-ring
7. Side Cover Assembly

Mate the screw hole at the center of the side cover
(1) with the adjuster screw (2) on the sector shaft
assembly (3), and fix the side cover assembly to
the sector shaft assembly by turning the adjuster
screw counterclockwise.

Legend

1. Installer
2. Side cover

N3A0455E

N3A0456E

3B1-22 POWER STEERING

Valve Housing Assembly

Disassembly

1. Piston Assembly

Hold the housing with the piston end facing down-
ward, and turn the stub shaft counterclockwise.
Then, the worn shaft can be removed from the pis-
ton.

Caution:
The steel ball put in the ball race for the piston and worm
shaft will drop inside of the piston. Be careful not to let
the piston fall down.

Legend

1. Piston assembly

4. O-ring

2. Ball, tube, tube grip, screw and washer

5. O-ring

3. Seal ring

6. Valve housing and worm shaft assembly

N3A0457E