Removing and Installing/Replacing Brake Master Cylinder

34 31 500 - Removing and installing/replacing brake master cylinder





Necessary preliminary tasks:
- General Information Service and Repair
- Remove intake filter housing Service and Repair (R53)
- Remove battery box Removing and Installing/Replacing Battery Container (R50)
- Remove right partition
- Remove expansion tank Replacing Expansion Tank for Hydraulic Brake Actuation.

After completing tasks, bleed brake system Bleeding Brake System with ABS/ASC+T.





Unfasten brake lines (1).

Installation:
Tightening torque 34 32 1AZ 34 32 Brake Lines.

Release nuts (2) and withdraw brake master cylinder from brake booster.

Installation:
Replace self-locking nuts.

Tightening torque 34 31 1AZ 34 31 Brake Master Cylinder.

Note:
For vehicles with DSC:

Disconnect plug connection for pressure sensor.





Installation Note:
Replace O-ring (1) and (2).

When brake master cylinder:

If the brake master cylinder is replaced in vehicles with DSC, the pressure sensor must be modified.





Installation Note:
When inserting master brake cylinder into brake booster, make sure pressure rod of brake booster and pressure rod of master brake cylinder are in one plane.