Note: The tooth contact pattern must be checked if the gear set, housing or input bevel pinion bearing has been replaced.
- The contact pattern is adjusted by means of the shim washer (1) on the input bevel pinion.
- Use measuring fixture, BMW No. 33 2 600, to centre crown wheel.
- Degrease tooth flanks of crown wheel and pinion and coat with engineer's blue.
- Insert the crown wheel, press into housing with the palms of the hands and turn to and fro.
Caution: Teeth should never make contact at the smaller diameter.
- This is the contact pattern with a shim of the correct thickness and no load applied.
Note: The contact point is central on front flank V.
- The contact point is closer to the larger diameter on back flank R.
- Install a thinner shim if the contact pattern looks like this.
- Install a thicker shim if the contact pattern looks like this.