Isuzu N-Series. Manual - part 814

7B-26 MANUAL TRANSMISSION (MSB)

• Install the counter shaft assembly in the trans-

mission case.

• Install the snap ring to fix the counter 5th gear.

2. Reverse Idle Gear
3. Conical Spring
4. Thrust Washer

• Install the conical spring (1) and the thrust

washer (2) to the reverse idle gear.

• The conical spring is to be set up with its con-

cave face to the gear side shown in the illustra-
tion.

• The reverse idle gear should be installed with

the thrust washer side turned to the forward.

N7A0105E

N7A0106E

N7A0107E

N7A0100E

N7A0108E

MANUAL TRANSMISSION (MSB) 7B-27

5. Reverse Idle Gear Shaft

• Aligning the knock pin hole on the reverse idle

gear shaft with its hole of the transmission
case.

• Then insert the knock pin.

6. Side Cover

• Install the side cover with new gasket.

Tighten:
Side cover bolt to 18 N

⋅m (1.8 kg⋅m / 13 lb⋅ft)

7. Main Shaft Assembly

Notice:
Take care that the thrust washer of the reverse gear
does not drop off.

N7A0099E

N7A0109E

N7A0097E

N7A0096E

7B-28 MANUAL TRANSMISSION (MSB)

8. Main Shaft Rear Bearing

• Install the snap ring to the rear bearing outer

circumference.

• Install the rear bearing using the bearing install-

er.
Bearing Installer: 9-8522-1615-0

• Check to be certain the block ring on the 5th

gear side fitted properly to the inserts.

9. Top Gear Shaft Assembly

• Install the needle bearing to the top gear shaft.

• Install the top gear shaft assembly into the

transmission case.

• Check to be certain the block ring on the 4th

gear side fitted properly to the inserts.

• Press in the bearing until the snap ring of the

bearing outer circumference comes into con-
tact with the transmission case.

10. Counter Shaft Front Bearing

• Use the bearing installer to install the front

bearing.
Bearing installer: 5-8840-2244-0

• Install the counter shaft snap ring.

N7A0095E

N7A0110E

N7A0111E

N7A0112E

MANUAL TRANSMISSION (MSB) 7B-29

11. Counter Shaft Rear Bearing

• Install the snap ring to the rear bearing outer

circumference.

• Install the rear bearing using bearing installer

and install the snap ring.
Bearing Installer: 5-8840-2244-0

Notice:
With each gear set to the neutral position, check to see
if the shaft and each gear rotate smoothly.
Check to see if each block ring is free. When it gets
caught and stuck in the taper cone, use a screwdriver to
make it free.

12. 1st/2nd Shift Arm

• With the longer boss side set to the front.

13. 3rd/4th Shift Arm

• With the longer boss side set to the rear.

14. 5th/Reverse Shift arm

• With the longer boss side set to the front.

15. 5th/Reverse Shift Rod
16. 5th/Reverse Shift Block

• Turning the detent groove to the outside (de-

tent ball side), insert the shift rod from the rear
side with the detent groove side at the rear.

N7A0113E

N7A0114E

N7A0115E

N7A0116E