Brake Proportioning/Combination Valve: Service and Repair

Removal Procedure

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

1. Raise and suitably support the vehicle. Refer to Vehicle Lifting.





2. Clean the dirt and foreign material from the brake pipes and proportioning valve (1).





3. Disconnect the brake pipe fittings from the proportioning valve using a backup wrench.
4. Remove the proportioning valve (1).

Installation Procedure





1. Install the proportioning valve (1).

Notice: Refer to Fastener Notice in Service Precautions.





2. Connect the brake pipe fittings to the proportioning valve (1) using a backup wrench.
^ Tighten the Proportioning Valve Tube Nut to 15 Nm (11 ft. lbs.).
3. Lower vehicle.
4. Bleed the brakes. Refer to Brake Bleeding.