What does a brake system metering valve do?
A brake metering valve is used to Balance the Braking Forces. It is only found on vehicles with front disc and rear drum brakes. The metering valve holds back fluid to the front brakes until enough pressure is created to overcome the return springs inside the rear drums. It is also known as a “metering block.”
How do you know when a brake proportioning valve is 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.
How does the metering valve on the front brake work?
Open the bleeder screw to a front brake caliper and have a helper slowly apply the brake pedal. There should be a delay before fluid flows from the caliper bleeder. The metering valve is holding off the pressure until the rear drum brakes have applied.
What happens when you bleed the brake system?
A common problem that occurs when bleeding the brakes is uneven pressure through the brake system. This causes the pressure differential valve to move to the front or rear and become uncentered. If the valve is no longer centered, the process of realigning it is extremely difficult and frustrating.
When to replace the bleeder tool on a brake?
To keep the valve from misaligning, simply replace the switch with the proportioning valve centering tool (bleeder tool) prior to the brake-bleeding process. This tool prevents the valve from moving. Once the brakes have been bled, simply replace the bleeder tool with the pressure differential switch.
Where to put flare nut on brake bleeder valve?
Place a drain pan under the right rear wheel of the vehicle. Place a flare nut wrench on the brake bleeder valve, the small nut with the round opening, exiting the backing plate. Have your assistant pump the pedal three or four times and hold it.
Why do you need a metering block for rear drum brakes?
Metering blocks balance out the activation of the rear drum brakes and front disc brakes, preventing nose-dive. Because drum brakes lock up more easily than disc brakes, vehicles with rear drums use a proportioning valve to moderate the pressure to them. Adjustable proportioning valves let you tune that cut-off pressure.
A common problem that occurs when bleeding the brakes is uneven pressure through the brake system. This causes the pressure differential valve to move to the front or rear and become uncentered. If the valve is no longer centered, the process of realigning it is extremely difficult and frustrating.
To keep the valve from misaligning, simply replace the switch with the proportioning valve centering tool (bleeder tool) prior to the brake-bleeding process. This tool prevents the valve from moving. Once the brakes have been bled, simply replace the bleeder tool with the pressure differential switch.
What to do when your brake valve bleeds?
This tool prevents the valve from moving. Once the brakes have been bled, simply replace the bleeder tool with the pressure differential switch. This simple tool will save you tons of time and headache.