27 21 040 Replacing Radial Shaft Seal For Actuator Shaft (ATC 450)

27 21 040 Replacing radial shaft seal for actuator shaft (ATC 450)

Special tools required:





Important!
Read and comply with notes on protection against electrostatic damage (ESD protection).





Necessary preliminary work:
^ Disconnect battery earth lead

^ Remove cross member.





Disconnect connector (1).

Release screws (2) and remove transfer box from control unit (longitudinal torque module) (3).

Tightening torque 27 00 13AZ.





Screw special tool 23 0 490 into radial shaft seal.

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





Push the assembly sleeve 11 1 380 over the actuator shaft.

Important!
Non-observance 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.

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