How do I know if my combination valve is bad?
First, you might notice your car is taking a nose dive when you suddenly apply the brakes. Then your car may not stop fast enough. If your rear wheels lock up easily, especially when you drive on wet surfaces, it is a good sign your proportioning valve is going bad.
How do you reset a combination brake valve?
How to Reset a Brake 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.
Can I bypass brake proportioning valve?
This is not true. When a brake pedal is pressed in most situations (easing up to a red light or stop sign), the brake pressure for the front and rear brakes is equal as produced by the master cylinder and the proportioning valve doesn’t do anything.
Do I have to use the combination valve on both brakes?
When you look at the Combination Valve, you will notice two 3/8”-24 ports that both show going to the front brakes. You don’t have to use both or you can. The choice is yours. This will be based on the plumbing in the vehicle.
What happens if the proportioning valve on a car breaks?
Have a mechanic check your vehicle for a damaged brake proportioning valve if the rear brakes are wearing out more quickly than normal. A faulty brake proportioning valve could increase your vehicle’s braking distance, as it might reduce the pressure from the rear brakes too much.
Why do drum brakes have a proportioning valve on them?
Vehicles with drum brakes in the rear have much lower pressure for the drum brakes than the front disc brakes. This is why the proportioning valve only lets a particular amount of pressure through to the rear brakes.
What does the brake master cylinder valve do?
The valve stops the flow, or pressure of brake fluid to the rear drum brakes during every heavy braking or emergency stops; otherwise, the rear brakes lock up and skid, receiving too much pressure from the master cylinder.