Important: Do not wash the proportioning valve in any cleaning solution. The internal components are prelubricated with a special grease.

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Infromation.



2. Clean the dirt and foreign material from the brake pipes and proportioning valves.
3. Disconnect the brake pipe fittings from the proportioning valve using a backup wrench.
4. Remove the proportioning valve (1).

1. Install the proportioning valve (1).

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. Connect the brake pipe fittings to the proportioning valve using a backup wrench.

Tighten
Tighten the Proportioning Valve Tube Nut to 15 N·m (11 lb ft).

3. Lower vehicle.
4. Bleed the brakes. Refer to Hydraulic Brake System Bleeding .