Disassembly and Reassembly of Rear Cover

Self Made Tool:

Disassembly





1 Remove radial sealing ring (66) with a screw driver.





2 Remove locking ring (68) and knock-out radial ball bearing (67).





3 Remove drive pinion (129) for mechanical tachometer. Remove lock (131), remove shaft (130) and pinion (129).





4 Pull radial sealing ring (132) out of rear transmission cover (70).

NOTE: To facilitate removal, screw a hex. bolt M 12 into radial sealing ring and clamp into vise. Pull out radial sealing ring while applying light blows with a plastic hammer against transmission cover.

Assembly





NOTE: The punch is self-made according to specified dimensions.





NOTE: If a new plastic bushing (69) with O-ring (arrow) must be installed on vehicles with electronic tachometer, insert plastic bushing by means of selfmade punch.





5 Press-in radial ball beering (67) with a suitable mandrel.
6 Insert locking ring (68) and check for play.





NOTE: There should be no play between locking ring (68) and radial ball bearing (67). For this reason, three locking rings of varying thickness are available (refer to dimensions). When inserting locking rings make sure that ring is correctly seated in groove. If the locking ring cannot be inserted, use a thinner ring. In the event of play between locking ring and radial ball bearing, insert a thicker ring. Check with slip gauge (0.10 mm) for play.





7 Press-in radial sealing ring (66).





8 Carefully press-in radial sealing ring (132) up to stop (arrow).





9 Insert pinion (129) and shaft (130) into rear transmission cover together with locking ring (131).





NOTE: Flange contours (arrow) are different starting with installation of mechanical tachometer drive September 1981.

A. 1st version
B. 2nd version