Isuzu KB P190. Manual — part 1146
7B-20 MSG MODEL
REVERSE GEAR AND 5TH GEAR
Disassembly Steps
1. Bearing snap ring
2. Speedometer drive gear and lock ball
3. Bearing spacer
4. Mainshaft end ball bearing
5. Thrust ring snap ring
6. Thrust washer thrust ring
7. Thrust washer and lock ball
8. Counter reverse gear nut and washer
▲ 9. Counter end ball bearing
▲10. Counter 5th gear
11. Counter reverse gear
12. 5th gear
13. 5th block ring
14. Needle bearing
▲15. Mainshaft lock nut and washer
▲16. Rev. - 5th synchronizer assembly
17. Reverse gear
18. Needle bearing
19. Needle bearing collar
20. Thrust washer
21. Counter reverse gear lock nut
22. Thrust washer
23. Reverse idler gear
24. Thrust washer
25. Reverse idler shaft
▲26. Bearing snap ring
▲27. Bearing snap ring
▲28. Intermediate plate
MSG MODEL 7B-21
Important Operations
9. Counter End Ball Bearing
10. Counter 5th Gear
Use a gear remover to remove the counter 5th gear with the
ball bearing.
Gear Remover : 5-8840-0013-0 (J-22888)
15. Mainshaft Lock Nut and Washer
1) Engage the 3rd - 4th synchronizer with the 3rd gear.
2) Engage the 1st - 2nd synchronizer with the 1st gear.
3) Attach a holding fixture to the mainshaft and the
countergear.
Holding Fixture : 5-8840-2001-0 (J-29768)
4) Use a lock nut wrench to remove the lock nut.
Lock Nut Wrench: 5-8840-0353-0 (J-36629)
16. Rev. - 5th Synchronizer Assembly
1) Remove the synchronizer assembly as a set.
2) Disassemble the synchronizer assembly.
1
Springs
2
Sleeve
3
Clutch Hub
4
Inserts
26. Bearing Snap Ring
1) Insert the snap ring pliers
1
into the counter gear bearing
snap ring hole
2
.
The snap ring hole is in the intermediate plate
3
.
2) Use the snap ring pliers to force open the counter gear
bearing snap ring.
Tap on the front of the intermediate plate.
The ball bearing snap ring will come free.
7B-22 MSG MODEL
27. Bearing Snap Ring
28. Intermediate Plate
1) Insert the snap ring pliers into the mainshaft bearing snap
ring hole.
The snap ring hole is in the intermediate plate
2
.
2) Use the snap ring pliers
1
to force open the mainshaft
bearing snap ring
3
.
Hold the snap ring open with the pliers.
3) Push the intermediate plate toward the rear of the
transmission to remove it.
The ball bearing snap ring will come free.
MSG MODEL 7B-23
TOP GEAR SHAFT, MAINSHAFT GEAR AND COUNTER GEAR
Disassembly Steps
▲ 1. Top gear shaft snap ring
▲ 2. Top gear shaft
▲ 3. Ball bearing
4. Needle bearing
5. 4th block ring
6. Mainshaft snap ring
▲ 7. 3rd - 4th synchronizer assembly
8. 3rd block ring
9. 3rd gear
10. Needle bearing
▲11. Mainshaft ball bearing
12. 1st gear thrust washer
13. 1st gear
14. Needle bearing collar
15. Needle bearing
16. 1st block ring
▲17. 1st - 2nd synchronizer assembly
18. 2nd block ring
19. 2nd gear
20. Needle bearing
21.
Mainshaft
▲22. Rear ball bearing
23. Bearing snap ring
▲24. Front ball bearing
25. Counter gear
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