27 21 020 Replacing radial shaft seal for output flange (ATC 450)

WARNING: This page is about a different variant/trim than selected.

Special tools required:

27 1 440

IMPORTANT: After completing work, check transmission oil level and top up if necessary. For this transfer box, use approved transmission oil only.

Necessary preliminary tasks:

Remove propeller shaft. See 26 11 000 REMOVING AND INSTALLING PROPELLER SHAFT (INSERTED) COMPLETELY .

Release circlip (1).

Fig 1: Release Circlip (1)

G00497033

Courtesy of BMW OF NORTH AMERICA, INC.

Release output flange with three-claw extractor tool. Lever radial shaft seal out of housing with a suitable tool

IMPORTANT: Do not damage housing.

Fig 2: Lever Radial Shaft Seal Out Of Housing With A Suitable Tool

G00497034

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: Replace O-ring in output flange. Check that O-ring is in correct position.

Fig 3: Replace O-Ring In Output Flange

G00497035

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: Coat sealing lips of new radial shaft seal with clean transmission oil. Drive in radial shaft seal with special tool 27 1 440.

Fig 4: Drive In Radial Shaft Seal With Special Tool 27 1 440

G00497036

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Push on output flange.
Press down output flange using 2 screwdrivers.
Shim.
Continue pressing output flange down until retaining groove is completely visible.
Fit circlip.

Fig 5: Press Down Output Flange Using 2 Screwdrivers

G00497037

Courtesy of BMW OF NORTH AMERICA, INC.