363 589 02 21 00
Dial gage
Dial gage holder
Square drift
312 589 04 07 00
001 589 53 21 00
T35.30-0014-02
1 Rotate mounting plate of assembly device holding crown wheel and pinion so that differential/crown wheel axis is vertical with tapered roller bearing on crown wheel side at bottom.
Crown gear and pinion must be secured to mounting plate using at least 4 bolts around each bearing cap.
2 Position dial gage holder (1) with dial gage (2) on axle housing and place feeler of dial gage on end face of differential housing journal (3).
3 Rotate crown wheel (4) several times and set scale of dial gage (2) to 'zero'. Mark measuring point on journal (3).
The tapered roller bearing on the crown wheel side is preloaded in this position.
4 Rotate assembly device with crown wheel and pinion by 180°.
5 At dial gage (2) read off end play (EP) with dead weight of crown wheel (4) and dead weight of differential .
6 Set end play (EP) to zero by rotating threaded ring at crown wheel end (6) using square drift .
When doing so, adjust threaded ring (6) according to following equation:
12 x end play (EP) = t (rotation of threaded ring by 't' teeth)
The correct preload is set automatically because the end play is set to 'zero' while the dead weight of the crown wheel and differential is acting axially on the tapered roller bearing at the differential end.