Master Cylinder/Brake Booster, Servicing

Brake Master Cylinder/Brake Booster, Servicing

Note:
^ Master cylinders and brake boosters can be replaced separately

1. Brake booster
^ With gasoline engines vacuum is taken from the intake manifold
^ With Diesel engines a vacuum pump provides the required vacuum.
^ Functional check:
- With engine switched off, depress brake pedal firmly several times (to exhaust vacuum in booster).
- Depress brake pedal with average foot pressure, hold and start engine. If the booster is working properly, the pedal will give slightly under foot (booster becomes effective).
^ If faulty replace complete.
^ Check valve (in vacuum hose), Functional check. Refer to Vacuum pump for brake booster, removing and installing (vehicles with Diesel engines).
^ Separating booster from brake pedal.
^ Removing and installing. Refer to Brake booster, removing and installing.
2. Cap
3. Brake fluid reservoir
4. Sealing plug
^ Moisten with brake fluid and press into reservoir
5. Retainer pin
^ Insert through brake master cylinder
6. Brake master cylinder
^ Cannot be repaired. If faulty, replace complete.
7. Self-locking hex nut, 20 Nm (15 ft. lbs.)
8. Seal
^ Always replace
9. Sealing plug
10. Vacuum hose
^ Insert into brake booster
11. Gasket
12. Self-locking nut, 20 Nm (15 ft. lbs.)
13. Boot
^ Must be seated correctly or may cause air noise