Symptoms of a Bad or Failing Proportioning/Combination Valve can be found here.
The combination valve is located in the disc braking system.The front and rear brakes are controlled by it.Equal brake force cannot be applied to all of the wheels at the same time because the rear wheels will lock up.The drum brakes in the rear have a lower pressure than the front disc brakes.The proportioning valve only lets a small amount of pressure through to the rear brakes.Check for the following symptoms if you suspect there is an issue with your valve.
The rear wheels locking up when the brakes are applied is the main symptom of the proportioning valve going bad.On wet surfaces, the wheels will lock up more easily.When applied gently, the rear brakes may feel touchy.If your rear wheels lock up, contact a professional mechanic to have your proportioning/combination valve replaced.
There is a way to do a test on your own if you suspect you have a problem with the proportioning valve.If you want someone to watch the back brakes, find an empty parking lot and have someone come with you.If the person is safe away from the vehicle, drive the car and make a few stops.To practice an emergency stop, make sure to press the brake several times.There is an issue with the proportioning valve if the rear wheels lock up and the front wheels turn normally.The test should be done with extreme caution.
It is best to leave repairing and replacing the proportioning/conditioning valve to the professionals.It is a good idea to get a professional mechanic to fix the problem.Techiques use specialized tools to diagnose failures that may not be noticed.If you need to use the brakes in an emergency, make sure they work correctly.
Your brake system should be checked by a qualified mechanic as soon as you notice your rear wheels are locking up.Caution should be used if you have to drive the vehicle because the proportioning/conditioning valve is an important part of the braking system.YourMechanic makes it easy for you to get repairs to your proportioning / combination valve.You can book a service 24/7.Any questions that may arise are answered by YourMechanic's qualified technicians.
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