What valve prevents rear wheel lock up?
What valve prevents rear wheel lock up?
THE BRAKE PROPORTING VALVE The proportioning valve is able to reduce pressure to the rear brakes to prevent rear wheel lock up when the brakes are heavily applied. The proportioning valve is usually mounted near the master cylinder.
How does a rear brake proportioning valve work?
The proportioning valve reduces the pressure to the rear brakes. If equal braking force were applied to all four wheels during a stop, the rear wheels would lock-up before the front wheels. The proportioning valve only lets a portion of the amount of pressure to the rear wheels thus preventing rear wheel lock-up.
How do you lower the rear brake pressure?
Rotating the adjustment knob in a clockwise direction will allow more brake pressure to be applied to the rear brakes, counter-clockwise will reduce the pressure (when installed on the rear calipers line). At higher pressures, a piston separates the fluid at the inlet and outlet sides.
What kind of valve is used for disc brakes?
For an under-the-floor master cylinder brake system, a 2 lb. residual valve is used for disc brakes to keep brake fluid from flowing back down into the master cylinder. A combination valve provides everything you need to balance your brake system in one compact unit.
How does the proportioning valve in power brakes work?
The proportioning valve modulates pressure to the rear brakes so that as weight is transferred to the front wheels under heavy braking loads and pressure on the system is increasing, less and less pressure is being applied to the rear brakes. This minimizes rear wheels lockup as weight is reduced on the rear axle.
Where do you put a brake residual valve?
The typical brake residual valve location is along the frame rail of the vehicle where there is a nice straight section of brake line to add it to. However, any area where there is enough line length for the installation is suitable, including in the engine compartment.
What is the purpose of a metering valve in brakes?
A metering valve will control fluid flow from the master cylinder causing the rear drum brakes to engage just before the front disc brakes. This allows the car to settle evenly under braking instead of nose diving. Residual valves are used to maintain constant pressure on the brake system.
For an under-the-floor master cylinder brake system, a 2 lb. residual valve is used for disc brakes to keep brake fluid from flowing back down into the master cylinder. A combination valve provides everything you need to balance your brake system in one compact unit.
How are residual valves used in Master brakes?
Residual Valve Residual valves are used to maintain constant pressure on the brake system. For drum brakes, a 10 lb. residual valve is used to hold pressure against the springs in the drum. This allows the drum brake to engage more quickly and reduces pedal travel. For an under-the-floor master cylinder brake system, a 2 lb.
The proportioning valve modulates pressure to the rear brakes so that as weight is transferred to the front wheels under heavy braking loads and pressure on the system is increasing, less and less pressure is being applied to the rear brakes. This minimizes rear wheels lockup as weight is reduced on the rear axle.
A metering valve will control fluid flow from the master cylinder causing the rear drum brakes to engage just before the front disc brakes. This allows the car to settle evenly under braking instead of nose diving. Residual valves are used to maintain constant pressure on the brake system.
