Adjustment overview

When assembling the transmission, the drive pinion and ring gear or drive set only require adjustment if parts have been replaced which have a direct influence on the setting of the final drive. Refer to the following table to avoid unnecessary adjustment procedures:

Adjust:

Replaced component:

Ring gear (S1 + S2)

Drive pinion via deviation

„r"

Drive pinion adjusting shim "S4"

Transmission housing

X

X

End shield

X

Differential housing

X

Tapered roller bearing for drive pinion

X

Tapered roller bearing for differential

X

Drive set

X

X

Cover for final drive

X

Needle roller bearing for 1 st gear

X

Synchronizer hub for 1st and 2nd gear

X

Needle roller bearing for 2nd gear

X

3rd gear gearwheel

X

Spacer sleeve

X

4th gear gearwheel

X

Practical procedure when readjusting the drive set

51 = Ring gear adjustment shim

52 = Ring gear adjustment shim

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 tapered roller bearings/differential.

2. Determine the total shim thickness "Stot" (S3 plus S4) for the specified preload of the tapered roller bearings/drive pinion.

3. Split total shim thickness "Stot" into S3 and S4 in such a manner that the dimension from the center of the ring gear to the face of the drive pinion corresponds to the installation dimension "E" determined during manufacture.

53 = Drive pinion adjustment shim

54 = Drive pinion adjustment shim

4. Split 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.

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