Replacing Master Brake Cylinder For DSC
34 31 505 Removing and installing/replacing master brake cylinder for DSCSpecial tools required:
^ 32 1 270
Necessary preliminary tasks
^ Remove expansion tank.
^ Remove footwell trim.
^ Read and comply with General Information.
After completing tasks, bleed brake system with DSC.
Remove locking clip (1) and disengage and pull out locking pin.
Slacken nuts (2).
Installation:
Replace self-locking nuts.
Tightening torque 35 11 1AZ; Bearing pedestal to brake assembly and body 26 Nm
(Retighten 1x on brake booster after 30 min)
Unfasten brake lines (1).
Detach brake lines at junction (2) and remove short sections.
Seal off brake lines and brake master cylinder with plugs 32 1 270.
Installation:
Fit lines at both connection points and then tighten down.
Tightening torque 34 32 1AZ; Brake hose couplings 18 Nm
Release nuts (3) and feed brake master cylinder out of brake booster.
Installation:
Replace self-locking nuts.
Tightening torque 34 31 1AZ; Brake master cylinder to brake booster vacuum 26 Nm
(Replace self-locking nut retighten after 30 minutes)
Installation:
Replace sealing ring.
Important! Brake booster (1) must be loosely screwed into place so as not to jam brake master cylinder (2) during installation.
Installation:
When inserting the brake master cylinder (2) into the brake booster (1), make sure the pressure rod of the brake booster and that of the brake master cylinder meet each other on one level.