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 23 0 490 Extractor
- 27 1 400 27 1 400 Drift
- 33 1 150 33 1 150 Fixture





Important!
After completing tasks, check gear oil level Changing Oil In Transfer Box (ATC 400/500) and top up if necessary.

Use only approved gear oil in this transfer box.





Necessary preliminary tasks:
- Remove transfer box Removing And Installing Transfer Case (ATC 400 X-Drive).





Release retaining ring (1).





Remove drive flange with special tool 33 1 150 33 1 150 Fixture.





Installation Note:
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 Note:
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 Note:
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 23 0 490 Extractor.

Drive out radial shaft seal (1) with impact weight (2).





Drive in radial shaft seal with special tool 27 1 400 27 1 400 Drift.





Add final details to vehicle.

Check oil level.

Check transmission for leaks.