Checking brake servo vacuum system

Make

Audi

Model

A1

Section

Brake system › Brakes, hydraulics, regulator, servo › Checking brake servo vacuum system

Running gearChecking brake servo vacuum system

Checking brake servo vacuum system The following instructions are intended to help you trace the causes of faults quickly and effectively in the event of problems involving the brake servo or in the event of a »hard brake pedal«. This check relates to the following components: t  Brake servo t  Seal between brake master cylinder and brake servo. t  Non-return valve t  Vacuum hoses with connectors t  Vacuum pump (if fitted) When evaluating the measured results, bear in mind that they will be influenced by your geographical location. The higher your location is above sea level, the lower the air pressure will be. Before checking the vacuum system, it is important to observe the following test requirements: t  Visual inspection of all vacuum hoses for damage (e.g. cracks or animal bites) and to check that they are correctly and firmly attached t  Ensure cleanliness when working on the vacuum system t  Before starting work, clean the engine compartment if necessary Special tools and workshop equipment required

t  Vacuum gauge for brake servo -VAS 6721-

01 Steering & suspension