Vacuum Brake Booster: Service and Repair

REMOVAL PROCEDURE

IMPORTANT: It is not necessary to remove or disconnect the master cylinder from the vehicle in order to remove the vacuum booster. However, if both the vacuum booster and master cylinder are to be removed, remove the master cylinder first as described in Master Cylinder Replacement





1. Remove the master cylinder attaching nuts (6).
2. Remove the master cylinder from the booster (7).
Move the master cylinder forward just enough to clear the studs on the vacuum booster. This will flex the brake pipes slightly. Do not bend or distort the brake pipes.
3. Disconnect the vacuum hose from the vacuum check valve (1).
4. Remove the booster attaching nuts (4).
5. Remove the booster (2).
6. Remove the booster pushrod from the brake pedal (3).
7. Tilt the entire vacuum booster slightly to work the booster pushrod off the pedal clevis pin without putting undue pressure in the pushrod.
8. Remove the booster from the vehicle.

INSTALLATION PROCEDURE





1. Install the booster (2) onto vehicle.
2. Connect the booster pushrod (3) to the brake pedal.
Tilt the entire vacuum booster slightly. Work the booster pushrod onto the pedal clevis without putting undue pressure on the pushrod.
3. Install the booster attaching nuts (4).

Tighten the nuts to 28 Nm (20 ft. lbs.).

NOTICE: Refer to Fastener Notice in Service Precautions.

4. Install the booster vacuum hose to the vacuum check valve.
5. Install the master cylinder to the booster and the attaching nuts (6).

Tighten the nuts to 28 Nm (20 ft. lbs.)