How does a Honda proportioning valve work?
The proportioning valve typically connects the master cylinder to the rest of the braking system, but sometimes it is independent of the cylinder. This valve is necessary for optimizing front-to-rear bias, also referred to as brake balance. Then, the valve’s plunger unseats and fluid rushes into the calibrated range.
Where is the proportioning valve on my car?
Ask the assistant if the dash light has gone out. If not, you will need to check the proportioning valve, which will be located next to your master cylinder. The valve looks like a small cast iron block, and it has a master cylinder line feeding it, with rear and front brake lines attached to it.
Where is the reset button on the brake proportioning valve?
After continued use, the proportioning valve can become out of alignment and it may need to be reset. It is helpful to have some knowledge of vehicle mechanics to complete this task, but it is unnecessary. Locate the brake proportioning valve near the rear brake line. It will have one or two buttons located on it.
Where do you put brake fluid in a Honda Accord?
Fill your master cylinder with brake fluid. Bleed the right front bleeder valve, then bleed the left front bleeder valve last. Ask the assistant if the dash light has gone out. If not, you will need to check the proportioning valve, which will be located next to your master cylinder.
How do you get a proportioning valve unstuck?
Apply the emergency brake and lift the hood. Unscrew, or unsnap the master cylinder cap and fill the master cylinder with brake fluid to the top limit line. Leave the cap off. Use a floor jack to raise the vehicle at the front end and place two jack stands under the frame near each wheel.
When to replace a proportioning / conditioning valve in a car?
If the rear wheels lock up and the front wheels turn normally, there is an issue with the proportioning valve. This test should be performed with extreme caution. Repairing and replacing the proportioning/conditioning valve is best left to the professionals because you are dealing with the braking system.
How do you get a proportioning valve to work?
Bleed the rear brake line again at the proportioning valve, as you did before if you still have a brake dash light. Bleed the front brake lines on the proportioning valve in the same fashion. This reversal of pressure will eventually break the spool loose inside the proportioning valve, equalizing the pressure between the front and rear brakes.
How can I tell if my proportioning valve is going 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.
Why does the proportioning valve only work on rear brakes?
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. If you suspect there is an issue with your proportioning valve, check for the following symptom: