The 9253920710 Wabco double diaphragm is a genuine Wabco brake part from Pro Gear and Transmission. A double diaphragm brake unit pairs a service section with a spring-loaded section, so one actuator applies the brakes for normal stops and also holds them applied for parking or if air pressure is lost. A steady air hiss at the dash valve or quick release valve while the parking brakes are released can point to a leaking secondary diaphragm. Call us to confirm proper fit.
Features
Genuine Wabco double diaphragm
Brake system part
Service and spring-loaded sections work together in this style of unit
Constant air hiss with parking brakes released can mean a leaking diaphragm
