Drive Set Adjusting, General

Adjusting drive set







Tools

Practical Procedure When Readjusting The Drive Set

If it becomes necessary to adjust drive pinion and ring gear, follow the below sequence to ensure an efficient working procedure:

1. Determine the total shim thickness "Stot" (S1 Plus S2) for the specified preload on the taper roller bearings/differential.

2. Determine the thickness of shim "S3".

3. Split the total shim thickness "Stot" into S1 and S2 so that the specified circumferential backlash is present between ring gear and drive pinion.

The aim of this adjustment is to restore the smoothest running position which has been achieved on test equipment in the production line.

To achieve correct results, greatest possible cleanliness for all assembly work and measuring procedures is essential.

When assembling the final drive assembly, it is only necessary to readjust drive pinion and ring gear or drive set if components have been replaced which have a direct influence on the adjustment. Refer to the following table to avoid unnecessary adjustment procedures!




Table Of Required Adjustments For Component Replacement




Spacer, shims, dimensions view

Note: Correct results can only be achieved if assembly work and measuring procedures are carried out carefully and with maximum cleanliness.

Adjusting drive set, general





The setting of drive pinion and ring gear is a determining factor for the service life and smooth running of the rear-axle drive. Drive pinions and ring gear that have been checked for good tooth contact pattern and low noise in both directions of rotation on special test equipment are therefore matched during production. The position at which smoothest running can be achieved is determined by shifting the drive pinion axially, with the ring gear being kept within the tolerance of the prescribed tooth backlash. The deviation "r" from the specified design dimension "Ro" is measured, added to the design dimension "Ro" and engraved on the ring gear as setting value "E".

NOTE: All other characters are used for adjustment in production.