How do you reset the proportioning valve on a Jeep Cherokee?
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.
How does the brake proportioning valve work on a car?
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. The proportioning valve sends more braking pressure to the front and less to the rear.
Is there a brake proportioning valve mod for a Jeep Cherokee?
This mod increases REAR braking force and is primarily intended for those who have converted their rear brakes to discs. This mod may also apply to drum systems that have been altered with larger bore rear wheel cylinders (as mine was). You’ll have to evaluate the results on your vehicle.
Why is the proportioning valve on my car 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.
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.
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:
This mod increases REAR braking force and is primarily intended for those who have converted their rear brakes to discs. This mod may also apply to drum systems that have been altered with larger bore rear wheel cylinders (as mine was). You’ll have to evaluate the results on your vehicle.
How can you bypass a proportioning valve in a car?
Perform the same brake fluid bleed on the rest of the wheels, continuing next with the left rear wheel, until all air is removed. 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.
What happens when the proportioning valve goes bad?
Rear wheels lock up. 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.