Replacing Radial Shaft Seal For Output Flange (ATC 400/500 X-Drive)

27 21 020 Replacing radial shaft seal for output flange (ATC 400/500 X-Drive)

Special tools required:
^ 23 0 490
^ 27 1 400
^ 33 1 150

Important! After completing tasks, check gear oil level and top up if necessary.
Use only approved gear oil in this transfer box.

Necessary preliminary tasks:
^ Remove transfer box.





Release retaining ring (1).





Remove drive flange with special tool 33 1 150.

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





Important! The propeller shaft may move when the output flange is pushed on. The retaining ring can thus no longer be fitted.





Installation:
Version: output shaft with mounting groove (1):
- Push on output flange.
- Using 2 screwdrivers, press output flange downwards or output shaft (2) upwards until groove for retaining ring is completely visible.
- Fit retaining ring.





Installation:
Version: transmission output shaft without mounting groove:
- Support transfer box with a suitable sleeve (1) on transmission input shaft (2).
- Push on output flange.
- Fit retaining ring.





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.

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








Drive in radial shaft seal with special tool 27 1 400.
Add final details to vehicle.
Check oil level.
Check transmission for leaks.