Without Antilock Brakes
NOTE: The components of the proportioning valve assembly are not serviceable or replaceable. If a component of the proportioning valve assembly is not functioning properly, the proportioning valve must be replaced as an assembly.REMOVE
1. Using a brake pedal depressor, move and lock the brake pedal to a position past its first 1 inch of travel. This will prevent brake fluid from draining out of the master cylinder when the brake tubes are removed from the proportioning valve.
2. Raise vehicle on jackstands or centered on a hoist.
CAUTION: Before removing the brake tubes from the proportioning valve, the proportioning valve and the brake tubes must be thoroughly cleaned. This is required to prevent contamination from entering the proportioning valve or the brake tubes.
Chassis Brake Tubes At Proportioning Valve:

3. Remove the 4 chassis brake tubes from the inlet and outlet ports of the proportioning valve.
Proportioning Valve Mounting:

4. Remove the 2 bolts attaching the proportioning valve to the proportioning valve mounting bracket. Remove the proportioning valve from the mounting bracket.
Actuator Attachment To Proportioning Valve:

5. Remove the hooked end of the proportioning valve actuator from the isolator bushing on the lever of the height proportioning valve.
INSTALL
1. Install the hooked end of the actuator on the proportioning valve lever. Be sure isolator bushing on lever of proportioning valve is fully seated in hook of actuator.
NOTE: When installing height sensing proportioning valve on mounting bracket be sure proportioning valve shield is installed between the proportioning valve and the mounting bracket.
2. Install height sensing proportioning valve on mounting bracket. Install the proportioning valve attaching bolts. Tighten the attaching bolts to a torque of 23 Nm (200 inch lbs.).
3. Install the 4 chassis brake lines into the inlet and outlet ports of the proportioning valve. Tighten all 4 line nuts to a torque of 16 Nm (142 inch lbs.).
4. Adjust the proportioning valve actuator.
5. Bleed the brake system thoroughly to ensure that all air has been expelled from the hydraulic system.
6. Lower the vehicle to the ground.
7. Road test the vehicle to verify proper operation of the vehicles brake system.