Brake master cylinder and vacuum brake booster, servicing
WARNING: This page does not describe the selected car, but rather 27 other vehicles, including the 2002 Volkswagen Cabrio, 2001 Volkswagen Cabrio, 2000 Volkswagen Cabrio, 1999 Volkswagen Jetta, and 1999 Volkswagen Golf. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- Brake master cylinders and brake boosters from different suppliers are installed in production.
- If replacement is necessary, parts from different suppliers are interchangeable.
The following list pertains to Fig 1.
- Cap
- Seal
- Brake fluid reservoir
- Plug
- Moisten with brake fluid and press into reservoir
- Not for USA/Canada models
- Master cylinder
- Replace complete unit if necessary
- 20 N.m (15 ft lb)
- Washer
- Always replace
- Not for USA/Canada models
- Seal
- Always replace
- Vacuum brake booster
- Cannot be repaired, replace complete unit if necessary
- Booster function is OK if pedal drops slightly as vacuum builds and boost takes effect
- Separating from brake pedal, seeBRAKE PEDAL, SEPARATING FROM BRAKE BOOSTER
Checking function:
- Depress brake pedal several times with engine not running, to relieve vacuum
- Depress and hold brake pedal while starting engine
Check valve in vacuum line:
- It should be possible to blow air through valve in direction of arrow on valve (blowing air through valve in opposite direction should close valve)
- 20 N.m (15 ft lb)