Replacing Radial Shaft Seal For Output Flange

27 21 020 Replacing radial shaft seal for output flange

Special tools required:
^ 23 0 020
^ 23 0 490
^ 23 2 320
^ 27 1 380
^ 33 1 150

Important! After completion of work, check transmission oil level and top up if necessary.
Use only approved transmission oil in this transfer case.

Necessary preliminary tasks:
^ Remove exhaust system.
^ Detach propeller shaft at transfer case.





Secure output flange with special tool 23 0 020.
Release nut (1) with special tool 23 2 320.
Tightening torque:
Output Flange: E53 (NV125) = 110 Nm.
Output Flange: E53 (LWX 500) = 300 Nm.
Collar nut must be installed with Loctite 270 or Hylogrip bolt cement.


Installation:
Replace nut (1).
Secure nut (1) at points (2).

Note: Illustration shows E53.





Remove drive flange with special tool 33 1 150.
Drive a hole into radial shaft seal (2) using a center punch (1). See illustration.





Important! Do not use a drill as drillings may result in transmission malfunction.





Install special tool 23 0 490.
Drive out radial shaft seal (1) with impact weight (2).





Drive in radial shaft seal with special tool 271 380.

Installation:
Radial shaft seal must rest flush on housing.

Add final details to vehicle.
Check oil level.
Check transmission for leaks.