27 21 040 Replacing radial shaft seal for actuator shaft (ATC 350)
WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2015 BMW Alpina B7L xDrive, 2015 BMW Alpina B7 xDrive, 2015 BMW 750i xDrive, 2015 BMW 750Li xDrive, and 2014 BMW Alpina B7L xDrive. However, it is still accessible from the selected car via links, so may be relevant.
Special tools required:
IMPORTANT:
Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION)
.
Necessary preliminary tasks:
- Disconnect BATTERY NEGATIVE LEAD .
- Remove TRANSMISSION CROSS-MEMBER .
Disconnect connector (1).
Release screws (3) and remove transfer case control unit (longitudinal torque module) (2).
Tightening torque 27 10 3AZ .
Installation note:
Replace O-ring.
NOTE:
The radial shaft seal for the actuator shaft must also be replaced.
Thread special tool 23 0 490 into radial shaft seal (1).
Drive out radial shaft seal (1) with impact weight (2).
Push the assembly sleeve 11 1 380 over the actuator shaft.
IMPORTANT:
Nonobservance involves a risk of damage to the radial shaft seal.
Slide the new radial shaft seal (1) over the assembly sleeve (2) onto the actuator shaft.
Drive radial shaft seal fully home using special tool 11 1 200 and plastic hammer.
Remove the assembly sleeve.