26 11 100 Removing and installing three-hole flange

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IMPORTANT: The slide-in nut must be replaced by a new one.

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 tasks:

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.

Installation note:

Replace ZNS bolts and self-locking nuts.

Fig 1: Identifying Propeller Shaft, Flexible Disc And Three-Hole Flange

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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: see 6AZ in 26 11 PROPELLER SHAFT, COMPLETE

Fig 2: Releasing Insert Nut Using Special Tool (33 5 040 And 33 5 070)

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

Installation note:

Retaining clip and gasket must be replaced.

Fig 3: Identifying Retaining Clip And Gasket

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Remove insert nut (1).

Installation note:

Insert nut must be replaced.

Fig 4: Identifying Insert Nut

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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: refer to BMW SPECIFIED GREASE

Fig 5: Identifying Insert Collar And Bevel Pinion

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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: refer to BMW SPECIFIED GREASE

Fig 6: Identifying Hub Teeth And Thread

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Place flange nut (1) with gasket in insert collar of flange nut.

Install retaining clip (2).

Fig 7: Identifying Retaining Clip And Flange Nut

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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: see 6AZ in 26 11 PROPELLER SHAFT, COMPLETE

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

Fig 8: Sliding Drive Flange Onto Insert Nut

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