How To Unstick A Brake Proportioning Valve - SIO

How To Unstick A Brake Proportioning Valve

Home How To Unstick A Brake Proportioning Valve

If you’ve ever had to brake hard while your car was heavily loaded, you may have noticed that your car didn’t stop as quickly as it did when the car was empty. This is because the braking power isn’t distributed evenly between the front and rear brakes when a car is overloaded.

Non-linear brake pressure sensors help adjust this distribution, but if your car’s brake proportioning valve is stuck, it won’t be able to do its job. In this post, we’ll show you how to unstick a brake proportioning valve so that your car can stop as quickly as possible, even when it’s heavily loaded.

How To Unstick A Brake Proportioning Valve

  1. Make sure the engine is off, and the transmission is in Park.
  2. Remove the cap from the brake fluid reservoir.
  3. Pump the brake pedal several times to push some fluid out of the reservoir into a clean cup or bottle.
  4. Reinstall the cap and remove it again to draw more fluid out of the reservoir, if necessary.
  5. Attach a clear plastic hose to an open end of a vacuum bleeder valve on one wheel cylinder.
  6. Attach the other end of the hose to a vacuum pump or a shop vacuum.
  7. Set the pump to draw a vacuum, and open the bleeder valve. Watch for fluid to come out of the cylinder.
  8. Stop when fluid begins to come out of the cylinder, close the valve, and let it sit for about five minutes. The brake pedal should feel firm again when you push on it with your foot.

How do you reset a brake proportioning valve?

The brake proportioning valve is a vital component of any car’s braking system. Its purpose is to distribute braking force evenly between the front and rear brakes, ensuring that the wheels can stop the car safely. However, over time, the proportions can become unbalanced, causing the car to pull to one side when braking.

If this happens, the brake proportioning valve will need to be reset. The exact process will vary depending on the make and model of the car, but it typically involves loosening a few nuts and bolts, adjusting the valve, and then re-tightening everything. With a few simple tools and a bit of patience, anyone can reset their brake proportioning valve and restore balance to their car’s braking system.

How do you know if your proportioning valve is bad?

There are a few signs that may indicate your proportioning valve is going bad. If you notice that your vehicle’s brake pedal feels spongy or goes all the way to the floor, this could be a sign of a problem with the valve.

Additionally, if your brakes seem to be less effective than usual, or if they are activating erratically, this could also be an indication that the valve needs to be replaced. In some cases, you may also hear a hissing noise coming from the braking system. If you notice any of these issues, it is important to have the valve checked out by a professional as soon as possible to avoid potential problems with your brakes.

What can happen if the proportioning valve did not work?

If the proportioning valve did not work, the brake fluid would not be able to flow properly and the brakes would not be able to function properly. The vehicle could potentially overheat, leading to a loss of control and an accident. In extreme cases, the brakes could fail completely, causing the driver to lose control of the vehicle. As a result, it is essential that the proportioning valve is working correctly in order to ensure the safety of the vehicle.


Copyright© 2019 Ninbo SIO Fluid Equipment Co., Ltd. All Rights Reserved.