Vacuum Brake Booster: Service and Repair

Vacuum Brake Booster Replacement (L47)
Removal Procedure





1. Place the vehicle on a level surface.
2. Block the front wheels.
3. Apply the park brake.
4. Shift the vehicle into low gear.
5. Remove the left closeout insulator panel.
6. Remove the left knee bolster.
7. Remove the retainer clip for the from the brake pedal clevis pin.
8. Remove the foam spacer from the brake pedal clevis pin.
9. Disconnect the vacuum brake booster pushrod from the brake pedal clevis pin.
10. Remove the brake pedal to booster mounting nuts.





11. Remove the air cleaner assembly.
12. Remove the master cylinder from the vacuum brake booster.





13. Remove the cruise control module (1) and position out of the way.
14. Disconnect the electrical connector (2) at the left strut tower.
15. Remove the accelerator control cable bracket from the throttle body and position the cables and bracket out of the way.
16. Remove the left carpet retainer.
17. Disconnect the shift control cable from the shaft lever pin.
18. Remove the shift control cable and bracket and position out of the way.
19. Disconnect the vacuum brake check valve and hose as an assembly from the vacuum brake booster.
20. Remove the inlet heater pipe.





21. Remove the vacuum brake booster from the vehicle.
22. Remove the vacuum brake booster mounting gasket, if gasket replacement is necessary.

Installation Procedure





1. Install the brake booster mounting gasket to booster, if removed previously.
2. Install the vacuum brake booster to the vehicle.





3. Install the vacuum brake booster pushrod to the brake pedal clevis pin.
4. Install the foam spacer to the brake pedal clevis pin.
5. Install the retaining clip to the brake pedal clevis pin.

Notice: Refer to Fastener Notice in Service Precautions.

6. Install the booster stud mounting nuts to the booster studs.
^ Tighten the brake pedal to booster stud mounting nuts to 23 Nm (17 ft. lbs.).
7. Install the left knee bolster.
8. Install the left closeout insulator panel.
9. Install the left carpet retainer.





10. Install the inlet heater pipe.
11. Install the shift control cable and bracket.
12. Connect the shift control cable to the shaft lever pin.
13. Shift the vehicle into park.
14. Install the master cylinder to the vacuum brake booster.
15. Install the master cylinder mounting nuts.
^ Tighten the master cylinder mounting nuts to 25 Nm (18 ft. lbs.).
16. Reposition and connect the vacuum check valve to the vacuum brake booster.





17. Connect the electrical connector (2) to the left strut tower.
18. Install the cruise control module.
19. Install the accelerator control cables and bracket.
20. Install the air cleaner assembly
21. Remove the blocks from the front wheels.
22. Release the park brake.