The 9253800030 Wabco double diaphragm is a brake part. In a double diaphragm chamber one section applies the brake in normal service, and a spring section behind it applies the brake when air is lost or the parking brake is set. Air pressure holds the powerful spring compressed so the brakes stay released while the system is charged. A leaking secondary diaphragm often shows as a steady hiss at the park control valve exhaust with the brakes released, and a spring that does not fully release can cause drag and heat at the wheel end. A genuine Wabco part from Pro Gear and Transmission. Call us to confirm proper fit.
Features
Wabco double diaphragm
Service section for normal braking
Spring section for parking and emergency braking
Genuine Wabco part
