1. Using a dial indicator, measure the clearance in the main gear engagement. The permissible clearance is 0.10-0.15 mm.
2. Using a dial indicator, measure the runout of the driven wheel. The permissible runout value is 0.05 mm.
3. Fix the axle gear and, using a dial indicator, measure the clearance in the engagement of the differential gears. The permissible clearance value is 0-0.076 mm.
Note: Measure in two places on the gear.
4. If the clearance exceeds the permissible value, adjust the clearance using the differential housing bearing adjusting shims.
5. If adjustment is not possible, replace the differential.
6. Check the contact patch in the main gear reducer engagement. To do this, you need to:
1) Apply paint to several teeth of the driven wheel.
2) Insert a brass rod between the final drive housing and the differential housing, then manually turn the final drive one way and then the other.
3) Compare the obtained contact patch with the table.
Note: After each adjustment of the contact patch, it is necessary to measure the clearance in the engagement of the teeth.
If the contact patch cannot be adjusted, the final drive assembly must be replaced.
7. Check the connection points on the main gear housing for leaks,
8. Check bearings for wear and damage.
9. Check the final drive housing for damage and cracks.
10. Check the gearbox gears for wear and damage.
11. Check the differential components for damage.