Wabco 9253070070 is a spring brake cylinder, the chamber that pairs a service brake section with a spring-applied parking section. In normal driving, air pressure holds the power spring back. When that air is vented, the spring extends and applies the brake, which is why the same chamber also works as the emergency brake if the air supply is lost. A chamber with corrosion or damage on the spring section should be replaced rather than repaired, since the spring sits under very high tension. A genuine Wabco part from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Wabco spring brake cylinder, part 9253070070
Combines a service brake section with a spring-applied parking section
Air pressure keeps the spring released; venting the air applies the brake
Works as the emergency brake when air supply is lost
A genuine Wabco part sold by Pro Gear and Transmission
