Secure measuring device, BMW # 33 2 600, with dial gauge to crown wheel and secure to housing with the knurled screw.
Secure measuring arm, BMW # 33 2 603, centrally to crown wheel.
Using the balls of your hands, press the crown wheel into the housing and turn it to and fro to check tooth backlash.
Note: Check tooth backlash at three points 120 degrees apart; turn the bevel pinion with the crown wheel.
Compensate for excessive backlash by inserting a thinner shim washer, and for insufficient backlash by inserting a thicker shim washer (1).
Note: Install spacer with bevel on inside diameter toward crown wheel.
Backlash:
- adjust without oil — 0.07...0.16 mm (0.0027...0.0063 in)
- provisional backlash — 0.1...0.5 mm (0.0039...0.0197 in)