1. Pinion nut
2. Connecting flange
3. Front oil seal
4. Drive gear front bearing
5. Final drive housing
6. Gasket
7. Filler plug
8. Side seal
9. Drain plug
10. Gasket
11. Drive gear bearing shim (flexible gasket)
12. Drive gear rear bearing
13. Drive gear height adjustment shim
14. Drive gear
15. Side bearing adjusting washer
16. Side bearing
17. Side gear thrust washer
18. Side gear
19. Axis of satellites
20. Satellite
21. Thrust washer satellite
22. Drive gear (ring gear)
23. Locking pin
24. Differential housing
25. Ring gear bolt
26. Bearing cap
27. Bearing cap bolt
28. Locating pin
29. Back cover
30. Breather
31. Cover bolt
Replacement
1. Drain the oil from the final drive housing.
2. Remove the rear drive shaft.
3. Remove cardan shaft.
4. Disconnect the connector (A) clutch control.
5. Support the final drive (A) assembled with a jack (IN).
Note: Tightening torque: 68.6 - 88.3 Nm.
6. Turn away a bolt of fastening and remove a cover (A) main gear.
Note: Tightening torque: 39.2 - 49.0 Nm.
7. Installation is carried out in the reverse order of removal.
Checking the technical condition
Install the final drive housing (A) with special tools (09517-43101 and 09517-43500). Then perform the following check.
1. Check the play in the final drive as follows.
(1) Lock the drive gear and rotate the driven gear to check if the backlash is within the standard value.
Note:
The measurement is carried out at 4 points along the circumference of the drive gear.
Standard value: 0.10 - 0.15 mm.
2. Check the runout of the reverse side of the driven gear as follows.
(1) Install a dial indicator on the reverse side of the driven gear and measure the runout.
Note: Limit value: 0.05 mm.
(2) If the runout is outside these limits, check 8 that there are no foreign objects between the driven gear and final drive housing and that the driven gear mounting bolts are properly tightened.
3. Check the play of the differential gear as follows,
(1) Lock the side gear with a wedge so that it cannot move, and measure the backlash of the differential driven gear with a dial indicator mounted on the drive gear.
Note: Standard value: 0 - 0.05 mm.
Take measurements at two points on the drive gear.
(2) If the play exceeds the limit value, adjust the engagement with the axle shaft bearing shims.
Note: If adjustment is not possible, replace side gear and drive gear as a set.
4. Check up a form of a spot of contact in the main transfer as follows.
(1) Apply an equal amount of paint compound to both surfaces of the driven gear tooth.
(2) Insert a copper rod between the final drive housing and the differential case, then turn the driveshaft mounting flange by hand (once in one direction, then once in the other direction), applying such a load to the driven gear that the load on the drive gear is approximately 25 - 30 Nm.
Attention. If the angle of rotation is too large, the contact patch in engagement will become unclear, and its shape will be difficult to check.
(3) Check the shape of the contact patch in the engagement.
Note:
After each adjustment of the contact patch, it is necessary to measure the gap in the meshing of the teeth.
If the contact patch cannot be adjusted, the final drive assembly must be replaced.
5. Check for oil leaks and seal lip for damage or wear.
6. Check bearings for wear or discoloration.
7. Check the final drive housing for cracks.
8. Check the drive and driven gears for wear or cracks.
9. Check side gears, drive gear and drive gear shaft for wear or damage.
10. Check the side gear splines for wear and damage.