Brake Proportioning/Combination Valve: Service and Repair

Combination Valve Replacement

Removal Procedure

Important: Note the identification code on the combination valve. The new valve must have the same identification number as the old valve.





1. Remove the combination valve electrical connector.
2. Remove the front and the rear brake pipes.
3. Remove the combination valve from the vehicle.

Installation Procedure

Important: Verify that the replacement combination valve has the same pin punched identification code as the code on the old combination valve.

1. Install the combination valve to the vehicle.





Notice: Refer to Fastener Notice in Service Precautions.

2. Install the front and the rear brake pipes to the combination valve.
Tighten the brake pipe nuts to 25 Nm (18 ft. lbs.).
3. Connect the combination valve electrical connector.

Important: Verify that the combination valve metering rod is depressed during bleeding.

4. Bleed the brake system. Refer to Hydraulic Brake System Bleeding (Manual) or Hydraulic Brake System Bleeding (Pressure).