34 31 500 Removing and installing/replacing brake master cylinder
Necessary Preliminary Tasks:
- General Information. Refer to 34 00 ... GENERAL INFORMATION .
- Remove intake filter housing (R53).
- Remove battery box (R50). Refer to 61 21 100 REMOVING AND INSTALLING/REPLACING BATTERY CONTAINER .
- Remove right partition.
- Remove expansion tank. Refer to 34 31 181 REPLACING EXPANSION TANK FOR HYDRAULIC BRAKE ACTUATION .
After completing tasks, bleed brake system. Refer to 34 00 048 BLEEDING BRAKE SYSTEM WITH ABS/ASC+T .
Unfasten brake lines (1).
Installation:
Tightening torque, (14 N.m.).
Release nuts (2) and withdraw brake master cylinder from brake booster.
Installation:
Replace self-locking nuts.
Tightening torque, (21 =/- 3 N.m.).
NOTE:
For vehicles with DSC: Disconnect plug connection for pressure sensor.
Installation:
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:
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.