Pinion Flange: Service and Repair

26 11 100 Removing And Installing Three-hole Flange

Special tools required:







IMPORTANT:
It is absolutely necessary to replace the sunk nut.
The sunk nut already has a screw locking.
After the propeller shaft has been screwed into the rear axle final drive (sunk nut), a hardening time of at least 2 hours is absolutely necessary.
The hardening time may be extended at lower temperatures.
Failure to comply with these instructions may cause serious damage.







Necessary preliminary work:
- Remove propeller shaft







Since the three-hole flange, the flexible disc and the propeller shaft are balanced as a single unit, the balance quality of the propeller shaft, flexible disc and three-hole flange may be compromised slightly when the three-hole flange is replaced.







IMPORTANT:
Before removing propeller shaft:
The three-hole flange and the propeller shaft must be reassembled in the same position.
Mark three-hole flange (1), flexible disc (2) and propeller shaft (3) in one plane.







Release insert nut against direction of travel in clockwise direction with special tool 33 5 040 and 33 5 070.
Grip with special tool 23 0 020.
Release three-hole flange (1) from bevel pinion.
Tightening torque 26 11 6AZ. 00 00 Excerpt From Company Standard BMW GS 90003-2







Remove retaining clip (1) and gasket (2).

Installation note:
Retaining clip and gasket must be replaced.







Remove insert nut (1).

Installation note:
Insert nut must be replaced.







Before installing three-hole flange:
Clean insert collar (1) on flange nut and gearing on bevel pinion (2). Fill insert collar (1) with grease. Grease: BMW Service Operating Fluids.







IMPORTANT: Thread of flange hub must not be contaminated with grease.

Clean thread (1) of flange hub to remove adhesive residues.
Clean hub teeth (2), then coat with grease.
Grease: BMW Service Operating Fluids.







Place flange nut (1) with seal in insert collar of flange nut.
Install retaining clip (2).







IMPORTANT:
The bi-hexagonal flange nut must not be used for bracing.
Failure to comply with this instruction may result in serious damage to the rear axle final drive.







IMPORTANT:
Insert nut must be screwed into place within 5 minutes.
Tightening torque 26 11 6AZ. 00 00 Excerpt From Company Standard BMW GS 90003-2

Slide drive flange (1) to the limit position onto insert nut and secure.

�7g :