Vacuum Brake Booster: Service and Repair

Brake Booster

Brake Booster:

Removal and Installation
Vehicles equipped with 5.4L engines
1. Remove the suction accumulator.

All vehicles
2. Remove the brake master cylinder.
3. Disconnect the brake booster vacuum hose from the brake booster vacuum check valve.

4. NOTE: Do not apply the brake pedal during the removal or installation of the stop lamp switch.

Disconnect the electrical connector and remove the stop lamp switch.

5. NOTE: Do not apply the brake pedal during the removal or installation of the speed deactivation switch.

Disconnect the electrical connector and remove the speed deactivation switch.
6. Remove the redundant self-locking pin cover, self-locking pin and the booster rod pin.
7. Remove the 4 brake booster nuts.
- To install, tighten to 25 Nm (18 ft. lbs.).
8. Remove the brake booster assembly from the vehicle.
9. To install, reverse the removal procedure.