Isuzu KB P190. Manual — part 120

4B-36 REAR AXLE

425R300010

Play in splines between the side gear and axle shafts.

mm(in)

Standard

Limit

φ220mm

0.08 - 0.38

(0.003 - 0.015)

0.5 (0.02)

φ194mm

0.08 - 0.36

(0.003 - 0.014)

0.5 (0.02)

425L100014

Differential cage

Check the ring gear the side gear fitting faces and the
cross pin hole for scores or roughness. Correct as
necessary. Slight scores or roughness may be
corrected with an oil stone or fine sand paper.

425R300006

Ring gear replacement:

1. The ring gear should always be replaced with the

drive pinion as a set.

2. Discard use bolts and install new ones.

3. Apply LOCTITE 271 on bolt from the end of

thread to the middle of straight portion.

4. Tighten the fixing bolts in a diagonal sequence as

illustrated.

Torque : 108 N

⋅m (11 kgf⋅m/80 lb⋅ft)

425RW033

REAR AXLE 4B-37

Reassembly

1. Install side gear with thrust washer in differential

cage.

2. Install the pinion gear by engaging it with the side

gears while turning both pinion gears

simultaneously in the same direction.

425RS048

3. Install cross pin.

• Be sure to install the cross pin so that it is in

alignment with the lock pin hole in the

differential cage.

425RS049

4. Check the amount of backlash.

Backlash between the side gear and the pinion

gear.

mm (in)

φ220mm 0.13-0.18

(0.005-0.007)

φ194mm 0.10-0.20

(0.004-0.008)

If the backlash is beyond the limits, adjust with a thrust
washer of selected thickness.

Thicknesses of thrust washers available.

Backlash mm

(in)

φ220

mm

0.80

(0.031)

0.90

(0.035)

1.00

(0.039)

1.10

(0.043)

1.20

(0.047)

1.30

(0.051)

φ194

mm

1.00

(0.039)

1.05

(0.041)

1.10

(0.043)

425RY00008

5. Install lock pin.

After lock pin installation, stake the case to

secure the lock pin.

6. Install ring gear.

Refer to “Ring gear replacement” on this section.

4B-38 REAR AXLE

LIMITED SLIP DIFFERENTIAL (LSD)

Disassembled View

425R300007

Legend

1.

Screw

2. Differential Cage B

3.

Thrust

Washer

4.

Spring

Plate

5.

Spring

Plate

6.

Friction

plate

7.

Friction

disc

8.

Friction

plate

9.

Friction

disc

10.

Pressure

Ring

11.

Side

Gear

12. Pinion and Pinion Shaft

13.

Side

Gear

14.

Pressure

Ring

15.

Friction

Disc

16.

Friction

Plate

17.

Friction

Disc

18.

Friction

Plate

19.

Spring

Plate

20.

Spring

Plate

21.

Thrust

Washer

22. Differential Cage A

REAR AXLE 4B-39

Disassembly

• Prepare a side gear holder : 5-8840-2682-0 as

shown in the left figure, clamp it with a stock vice,

and set a differential.

425R300008

1. Screw

• Apply a setting mark to the differential cage A

and differential cage B remove the bolt using

the press.

• Loosen four screws fixing differential cage A

to cage B equally and remove them.

425RS055

2. Remove differential cage A and B.

3. Remove thrust washer and two spring plates.

4. Remove friction plate and friction disc.

5. Remove friction plate and friction disc.

6. Remove pressure ring and side gear.

7. Remove pinion and pinion shaft.

8. Remove side gear and pressure ring.

9. Remove friction disc and friction plate.

10. Remove friction disc and friction plate.

11. Remove two spring plates and thrust washer.