Brake Proportioning/Combination Valve: Service and Repair

Brake Combination Valve Replacement

Removal Procedure





1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle Service and Repair.

2. Disconnect the electrical connector from the combination valve.

3. Disconnect the front and rear brake pipes from the combination valve.

4. Remove the combination valve bolt.

5. Remove the combination valve.

Installation Procedure





1. Install the combination valve to the frame.

Caution:
Refer to Fastener Caution Fastener Caution.

2. Install the combination valve bolt and tighten to 10 Nm (89 lb in).

3. Connect the front and rear brake pipes to the combination valve and tighten the fittings to 30 Nm (22 lb ft).

4. Connect the electrical connector to the combination valve.

5. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding (Pressure) Hydraulic Brake System Bleeding (Pressure)Hydraulic Brake System Bleeding (Manual) Hydraulic Brake System Bleeding (Manual).