34 33 071 Replacing Vacuum Hose For Brake Booster

34 33 071 Replacing Vacuum Hose For Brake Booster







IMPORTANT:
Before beginning work, fully press the brake pedal several times to reduce the vacuum pressure in the brake servo. This makes it easier to remove the vacuum hose.
Vacuum hose and non-return valve are welded together and are replaced together as a single unit.







Necessary preliminary tasks:
- Read and comply with General Information.
- Remove partition wall of the left units compartment







Pull off partition wall seal upper part (1) in direction of arrow.







Detach non-return valve (1) from brake servo.
Unfasten hose clamp (2).
Pull off vacuum line (3) from vacuum pump.
Pull out vacuum line (3) from bracket.

Installation note:
Check gasket for non-return valve and replace if necessary.
Replace hose clamp.