When does a proportioning valve need to be replaced?
If the rear pressure is in excess of 1000psi and is close to or equal to the front pressure then the valve is not working and will have to be replaced to correct the problem. Figure 49.5 Figure 49.6 Figure 49.7
Where are the proportioning valves located on a car?
Conventional proportioning valves are hydraulic activated and are located between the master cylinder and rear brakes. Vehicles with front to rear split hydraulic systems have one while diagonal splits system require two because each rear wheel is on a separate hydraulic circuit.
How does the proportioning valve work in a panic stop?
All vehicles, those with rear drum and rear disc brakes, will experience weight transfer during a panic stop. When weight is taken off the rear wheels during a panic stop the tendency for the rear brakes to lockup will increase. The proportioning valve is designed to limit the pressure to the rear brakes during a panic braking situation.
What kind of proportioning valve do I need for disc brakes?
We carry a wide array of proportioning valves to help you with your disc brake conversion. These valves help make sure you have the correct pressure you need in order to apply the front and rear brakes. When converting your drum to disc brakes there are a few options you can choose from: brass, aluminum, chrome and adjustable valves.
Do you have a 2 piece proportioning valve?
Your vehicle may already have a proportioning valve installed, but prior to 1971 you have a 2 piece system and some installers forget to remove both pieces when installing the new, revised, one-piece proportioning valve.
Do you need to change the proportioning valve on rear brakes?
Remember when converting your rear brakes, you will always need to change out the proportioning valve, regardless of if you have one already installed on your vehicle.
Where is the proportioning valve on a master cylinder?
Correct. You need to make up a short line from the front brake out port on the proportioning valve to the port on the distribution block. In my first photo it’s the one with the reddish fitting on one end and a gold colored one on the other. Then plug the port on the proportioning valve opposite that 169 171 Mar 29, 2017 West Allis Wisconsin
Where are the proportioning valves on my Lugnut?
Some proportioning valves are located in the rear of the vehicle or along the frame rails. You may have to do some exploring to find it. Sometimes the valve actuating mechanism may have rusted to the point where it no longer works.