Do Proportioning Valves Go Bad?
Since the Proportioning Valve Decreases the Pressure Sent to the Rear Brakes, the Main Symptom the Valve Is Going Bad Is the Rear Wheels Locking up When the...
Since the proportioning valve decreases the pressure sent to the rear brakes, the main symptom the valve is going bad is the rear wheels locking up when the brakes are applied. ... As soon as you notice the rear wheels locking up, contact a professional mechanic to have your proportioning/combination valve replaced.
How do you test a proportioning valve?
Pressure gauges are the best way to diagnose a failed proportioning valve. There will be a gage installed into the front and rear hydraulic circuits. Start the vehicle, and apply the brake pedal with heavy pedal pressure to duplicate a panic braking situation. The front and rear pressures should be different.
How do you reset a proportioning valve?
- Locate the brake proportioning valve near the rear brake line. It will have one or two buttons located on it. ...
- Push the reset button located on the valve with your fingers, which will reset it so the valve is working properly again. Inspect the brake pressure.