Wabco 4721706670 is a solenoid valve for air brake circuits. It is a three-way, normally closed design: with the coil unpowered it stays shut, and when the coil is energized it lets air through to the circuit it controls. That is how an antilock or air brake system switches compressed air on and off quickly, so brake pressure can be applied, held or released under electronic control. A tired valve usually announces itself with clicking, buzzing or humming from the coil, air leaking past worn sealing surfaces, or slow and incomplete action. Brakes that engage erratically are a reason to replace it promptly and check the wiring connections at the same time. A genuine Wabco part from Pro Gear and Transmission.
Features
Wabco solenoid valve, part number 4721706670
Three-way, normally closed: shut when unpowered, passes air when energized
Switches compressed air in a brake circuit under electronic control
Worn valves show clicking, buzzing, humming, air leaks or slow action
Tech Specs
- UPC: 193133443049
