Can you adjust a proportioning valve?
By James White
Can you adjust a proportioning valve?
The valve also has a port marked RI (rear Input) this port is located between the brake light switch, and the adjustment knob. On the Corvette style master cylinder the port for the rear brakes will be the port located closest to the master cylinder mounting tabs.
How do you adjust adjustable brake proportioning valve?
Use light pedal pressure, and as an extra precau- tion, move the lever to Position 7 (lever-type), or rotate adjusting knob in a clockwise direction (screw-type), to reduce internal pressure. The proportioning valve can be used to reduce brake line pressure, but will not increase it.
What is the difference between a metering valve and a proportioning valve?
The metering valve works with a proportioning valve to achieve balanced braking in these systems. A proportioning valve is located in-line to the rear brake system. It’s used to prevent rear-wheel lockup during sudden and hard braking situations.
How do you adjust a Wilwood proportioning valve?
The adjusting knob is marked with an arrow indicating the direction required to decrease line pressure to the calipers. The knob rotated all the way out (counter-clockwise) will provide a maximum pressure reduction of 57%. Rotating the know in (clockwise) will incrementally increase line prressure, up to full pressure.
How do you adjust a proportioning valve in CPP?
The best way to adjust the valve is to turn the adjustment knob clockwise until it reaches the end of the adjustment. If the front tires skid before the rear tires, apply the brakes hard in a safe location.
How do I choose a brake proportioning valve?
Proportioning Valve Selection Selecting the correct adjustable proportioning valve for your vehicle entails not only selecting the proper point at which slope limiting begins (the kneepoint), but also selecting the proper rate at which rear brake line pressure builds after that point (the slope).
What happens when a metering valve goes 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. Furthermore, the wheels will lock up more easily on wet surfaces. The rear brakes may feel touchy when applied even gently.
Can you mount a proportioning valve upside down?
It’s really not a gravity-based device and you can probably mount it upside down and backwards if you want.
Do you have to bleed a proportioning valve?
The proportioning valve doesn’t have any way to bleed air, so you will have to bleed the front and rear brake lines in order to remove any air trapped in the valve. Park your car on a flat surface and set the emergency brake, to prevent your car from rolling while you are working under it.
