CHECKING POWER BRAKE FUNCTION
Remove the vacuum by depressing the brake pedal approximately 5 times. Depress the brake pedal and start the engine. The pedal position should drop slightly if the power brake is functioning properly.
PRESSURE TESTING THE SYSTEM
Apply moderate pressure on the brake pedal for approximately 20 seconds. Then, repeat with high pedal pressure for 5 seconds. The pedal position must not drop. A drop indicates brake fluid leakage or booster vacuum leak.
REMOVAL & INSTALLATION
See Figures 1 and 2
- Disconnect the negative battery cable.
- Remove the master cylinder.
- Disconnect the vacuum hose and check valve from the booster.
- If required, disconnect the fuel filter and vacuum pump. Position them aside.
- From inside the vehicle, remove the soundproofing and disconnect the brake pedal rod.
- Remove the power booster retaining nuts.
- Remove the power booster from the vehicle.
- Before installing the booster, check the valve seal. Replace it if necessary. When installing the new check valve seal, ensure that the flange of the seal is in the correct position.
- On the 2 x 8 inch booster, install the sealing washer and seal onto the booster.
- Install the booster to the vehicle.
- Reconnect the brake pedal to the booster rod.
- Refit the soundproofing.
- Install the master cylinder, check valve and vacuum hose.
- Bleed the brakes and clutch, if so equipped.
- Connect the negative battery cable.