27 21 020 Replacing radial shaft seal for output flange (ATC 400/500 X-Drive)
WARNING: This page is about a different car, the 2010 BMW X3, 2009 BMW X3, 2008 BMW X3, and 2007 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.
Special tools required:
IMPORTANT:
After completing tasks, check gear oil level and top up if necessary, see 00 11 572 CHANGING OIL IN TRANSFER BOX (ATC 400/500)
.
Use only approved gear oil in this transfer box.
Use only approved gear oil in this transfer box.
Necessary preliminary tasks:
- Remove transfer box, see 27 10 010 Removing and installing transfer case (ATC 400 X-Drive) .
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.