What happens when a proportioning valve goes bad?

What happens when a proportioning valve goes 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 brakes are applied. Furthermore, the wheels will lock up more easily on wet surfaces. The rear brakes may feel touchy when applied even gently.

What is the best way to 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.

Why can’t I get brake fluid to my back brakes?

The quickest way to find out is to loosen the line that comes from the master cylinder at the combination valve to see if fluid flows when the pedal is pushed down. Tighten the line before releasing the pedal. If there is fluid there, loosen the line that goes to the rear brakes and try the same thing.

Can a bad proportioning valve cause front brakes to lock up?

A bad brake system proportional valve delivering equal fluid pressure to the entire brake system can cause the rear wheels to lock-up during heavy braking.

How do I reset my Chevy proportioning valve?

How to Reset a Brake Proportioning Valve

  1. Locate the brake proportioning valve near the rear brake line. It will have one or two buttons located on it.
  2. 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.

What does the combination valve do?

A combination valve is exactly what it sounds like – a valve that combines the function of multiple other valves. It’s a way to simplify and streamline unvented cylinder operation and to make maintenance and repairs easier. A combination valve usually includes four different types of valves.

Why does my brake pedal go to the floor after bleeding?

This is likely not the case; the condition can be caused by the piston sticking in the bore of the master cylinder during the bleeding process when the brake system is manually bled. The brake pedal will go to the floor and subsequent efforts to get a satisfactory brake pedal will fail.

Is it time for new C10 brake proportioning valves&distribution blocks?

Incorrect brake pressure can cause big problems for your vintage Chevy truck, and it’s important to keep proper brake bias between the front and rear of your vehicle. To alleviate or prevent problems like these, it may be time to get some new C10 Brake Proportioning Valves & Distribution Blocks.

What is a brake proportioning valve?

The brake proportioning valve controls the braking pressure between the front disc brakes and rear drum brakes. Since your front brakes generate up to 75% of the vehicle’s stopping force, equal pressure can’t be applied to all four wheels at the same time.

Are there any disc brake master cylinder and proportioning valves available?

Our disc brake master cylinder and proportioning valve kit is available for 2 and 4 wheel disc brake applications. Buy in monthly payments with Affirm on orders over $50. Learn more Light weight Hybrid aluminum disc brake master cylinder kit for your classic or performance car and truck! Original Hybrid master cylinder and prop valve.