Brake Chamber
Brake chambers are used on heavy-duty truck and trailer air brake systems to convert compressed air into mechanical force to apply the brakes. When the brake pedal is pressed, air pressure is sent to the brake chamber, which pushes a rod. This rod then applies force to the brake shoes or pads, creating friction with the wheel and bringing the vehicle to a stop.
Also known as: Actuator, Can, Combination, Combo, Complete, DDSB (Double Diaphragm Spring Brake), Emergency Brake, Maxi, Pot, Safety Brake, Spring Brake
Brake Chamber Types
Service Brake Chambers
Function: The service chamber is used to apply the brakes when the driver presses the brake pedal.
Operation: It operates using air pressure. When air is supplied to the chamber, it pushes a diaphragm, which in turn pushes a rod that applies the brakes.
Components: It consists of a diaphragm, push rod, and return spring.
Usage: Commonly found on the front (steer) axles of trucks and trailers.
Spring Brake Chambers
Function: The spring brake chamber serves two purposes: it acts as a parking brake and an emergency brake.
Operation: It has two sections: the service section (similar to a service chamber) and the spring section. The spring section contains a powerful spring that applies the brakes when air pressure is released. This spring is compressed (and the brakes are released) when air pressure is applied.
Components: It includes a diaphragm, push rod, return spring, and a powerful spring for the parking/emergency brake.
Usage: Typically found on the rear (drive) axles of trucks and trailers.