Flush the hydraulic booster system when you discover the following contaminants in the system:

Flushing involves running clean power steering fluid through the system until the draining fluid appears the same as the clean fluid. Contaminated fluid in the booster system can cause rubber parts to deteriorate.

1. Block the wheels.

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

2. Disconnect the negative battery cable.
3. Disconnect the electrical connectors from the electrohydraulic pump and the flow switch.
4. Remove the master cylinder. Refer to Master Cylinder Replacement .

Position the master cylinder away from the booster head. Secure the master cylinder in an upright position.

5. Disconnect the hoses from the booster. Use a suitable container in order to catch the fluid.

Discard the old fluid.

6. Cover or plug the hoses.



7. Remove the following components from the brake pedal:

•	The retainer

•	The washer

•	The pushrod




8. Remove the nuts from the inside of the vehicle.
9. Remove the nuts at the booster.
10. Remove the booster assembly.

1. Install the booster assembly.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Install the nuts at the booster.

Tighten
Tighten the nuts to 36 N·m (27 lb ft).

3. Install the nuts inside the vehicle.

Tighten
Tighten the nuts to 36 N·m (27 lb ft).




4. Install the following components to the brake pedal:

•	The pushrod

•	The washer

•	The retainer

•	Install the hoses.

•	Install the master cylinder. Refer to Master Cylinder Replacement .

•	Install the electrical connectors to the electrohydraulic pump and the flow switch.

•	Install the negative battery cable.

•	Fill the power steering reservoir. Refer to Fluid Capacities in Maintenance and Lubrication.

•	Bleed the power steering system. Refer to Power Steering System Bleeding in Power Steering Systems.

•	Inspect for proper brake operation.

•	Remove the wheel blocks.