Isuzu KB P190. Manual — part 1150

7B-36 MSG MODEL

13. Rev.-5th Synchronizer Assembly

1) Apply the engine oil to the clutch hub spline.

2) Install the synchronizer assembly to the mainshaft.

The sleeve heavy chamfer

1

and the insert short side

2

must be facing to the rear side of the transmission.

14. Mainshaft Lock Nut and Washer

1) Install a new lock nut and washer to the mainshaft.

Never reinstall the used lock nut and washer.

2) Use a lock nut wrench to tighten the lock nut to the

specified torque.

Lock Nut Wrench : 5-8840-0353-0 (J-36629)

Lock Nut Torque

N

⋅m(kgf⋅m/lb⋅ft)

127 (11 / 94)

22. Counter Reverse Gear Nut and Washer
Tighten the counter gear lock nut to the specified torque.
Reverse Gear Nut Torque

N

⋅m(kgf⋅m/lb⋅ft)

108 (11 / 80)

18. Thrust Washer and Lock Ball

23. Thrust Washer Thrust Ring

24. Thrust Ring Snap ring

1) Install the thrust washer with lock ball together with the

thrust ring to the mainshaft.

2) Use a pair of snap ring pliers to install the snap ring.

3) Use a thickness gauge to measure the clearance between

the 5th gear and the thrust washer.

5th Gear and Thrust Washer Clearance

mm(in)

Standard

0.1 - 0.3 (0.004 - 0.012)

If required, replace the existing thrust washer with a new

thrust washer to bring the clearance to specification.

MSG MODEL 7B-37

There are six thrust washer sizes available.

Thrust Washer Availability

mm(in)

7.8 (0.307)

7.9 (0.311)

8.0 (0.315)

8.1 (0.319)

8.2 (0.323)

8.3 (0.327)

4) Position the thrust ring snap ring gap

1

and the thrust ring

gap

2

so that they are separated at a 90° angle.

7B-38 MSG MODEL

DETENT AND SHIFT ARM ASSEMBLY

Reassembly Steps

1. Intermediate plate and gear assembly

▲ 2. 1st-2nd shift arm

▲ 3. 3rd-4th shift arm

4. Interlock pin

5. 3rd-4th shift rod

6. 1st-2nd shift rod

▲ 7. Rev.-5th shift arm

8. Rev.-5th shift rod

9. Detent ball

10. Detent spring
▲11. Detent spring plate and gasket

MSG MODEL 7B-39

3rd & 4th
shift arm

1st & 2nd
shift arm

Reverse & 5th shift arm

Important Operations

2. 1st-2nd Shift Arm

3. 3rd-4th Shift Arm

7. Rev.-5th Shift Arm

1) Hold a round bar against the shift rod end lower face to

protect it against damage.

2) Use a spring pin installer to install the spring pin to the shift

arm and the shift rod.

Never reinstall the used spring pins.

11. Detent spring Plate and Gasket.

1) Install the new detent plete and new gasket onto the

transmission case into the correct direction.

2) Tighten the detent spring plate bolts to the specified torque.

Detent Spring Plate Bolt Torque

N

⋅m(kgf⋅m/lb⋅ft)

19 (1.9 / 14)