Hydraulic Brake Booster: Service and Repair

Hydraulic Brake Booster Replacement

Removal Procedure

Notice: Hydraulic brake systems use two distinct and incompatible fluids. Power steering fluid is used in the hydraulic brake booster system. Brake fluid is used in the master cylinder and brake pipes. Use extreme care when selecting brake system fluids, or seal damage can result. Refer to General Information to select the correct fluid.


1. Apply the park brake.
2. Place a drain pan under the hydraulic brake booster and the booster reservoir.




3. Disconnect the reservoir hose from the booster.




4. Disconnect the power steering hoses from the booster.

Important: Do not remove the brake pipes from the master cylinder.


5. Remove the master cylinder nuts. Refer to Master Cylinder Replacement (Master Cylinder) .
6. Support the master cylinder.
7. Disconnect the pushrod from the brake pedal.



8. Remove the hydraulic booster mounting nuts from the inside of the vehicle.
9. Remove the booster assembly.
10. Remove the gasket.



Installation Procedure





1. Install the gasket.
2. Install the booster assembly.

Notice: Refer toFastener Notice in Cautions and Notices.

3. Install the booster mounting nuts.

Tighten the nuts to 36 Nm (27 lb ft).

4. Connect the pushrod to the brake pedal.




5. Install the master cylinder.
6. Install the master cylinder nuts.

Tighten the nuts to 36 Nm (27 lb ft).





7. Connect the power steering hoses to the booster.

Tighten the hose fittings to 27 Nm (20 lb ft).





8. Connect the reservoir hose to the booster.
9. Bleed the hydraulic brake booster. Refer toBleeding the Power Steering System in Power Steering System.
10. Release the parking brake.