Inspection data of rear axle final drive
321 589 04 21 00
Adjustment device
Dial indicator
001 589 53 21 00
D35.30-0134-01
The specified-value basic dimension is dictated by the measurement stop on the adjustment device.
1 Fit dial indicator (2) to adjustment device (3) and position adjustment clip (1) on adjustment device (3) at bottom.
2 Set dial indicator (2) with approx. 2 mm preload and set to zero.
This adjustment corresponds to the specified basic dimension.
3 Remove adjustment clip (1) from adjustment device (3).
W35.30-0047-01
4 Insert adjustment device (3) with dial indicator (2) into bearing mounting so that the centering pin engages with the centering bore of the drive pinion, and the locating pin of adjustment device (3) is geared towards the frontal area (arrow) of the drive pinion.
5 Read off measurement deviation.
6 Determine installed dimension.
Example: Dimensional deviation, e.g. 0.1 mm + basic dimension = measured installed dimension
W35.30-0025-01
Each drive pinion and crown wheel belonging to a gear set is marked with an engraved number. Only gear sets with the same number may be installed. The designations can be found on the end face of the drive pinion and on the beveled edge of the crown wheel.
Example: Gear seat designation 527 + 0.3
The first number (527) is the number of the pinion / crown wheel gear set.
The second number (+0.3) is the measurement deviation from the basic dimension in mm, i.e. + 0.3 mm.
Determine installed dimension:
Example gear set 527 + 0.3
Ring gear basic dimension 368 mm 83,5 mm
Measurement deviation on the
Crown wheel + 0.3 mm
Adjustment dimension
for gear set 527 thus 83,8 mm
Measured installed dimension
(Basic dimension with measurement
deviation) 83,6 mm
To achieve the basic dimension, a 0.2 mm thicker shim (max. 3 each) has to be inserted between the axle housing and axle bevel gear housing.
In other words, the distance from the center of the crown wheel to the end face of the drive pinion must be increased by 0.2 mm.
Shims are available in sizes 0.1 mm; 0.15 mm; 0.20 mm; 0.35 mm; 0.50 mm; 1.0 mm and 1.50 mm.
7 If necessary, remove axle bevel gear housing again and correct distance between axle bevel gear housing and axle housing using shims.
8 Install axle bevel gear housing and repeat measurement.