How does a load proportioning valve work?
The load sensing proportioning valve is located in the brake system for the rear wheels. It detects ,by way of a connecting rod; the weight or downward movement of a vehicle caused by a heavy load and allows more brake fluid/air/pressure to be applied to the rear brakes.
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.
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:
Where is the proportioning and combination valve located?
Average rating from 123,584 customers who received a Proportioning / Combination Valve Replacement. The proportioning valve, also called the combination valve, is located in the disc braking system. It is responsible for controlling the braking pressure between the front and rear brakes.
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.
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.
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:
When did the proportioning valve become universally mastered?
An easy guess, as proportion valve has been universally mastered since the 60s. 1987 had no excuse at all. Master cylinders have not mastered all that long..and hit or miss right into the 80s to have some antique. Last edited by Barry Donovan; June 21, 2012, 10:16 AM . the death rate and fairy tales cannot kill the nature left behind.
Average rating from 123,584 customers who received a Proportioning / Combination Valve Replacement. The proportioning valve, also called the combination valve, is located in the disc braking system. It is responsible for controlling the braking pressure between the front and rear brakes.