A set of Spring Brakes is used for supplying the service and parking brake functions on axles fitted with air disc brakes. The internal wind-off device permits elimination of the parking brake power if the air pressure is no longer present. The Spring Brakes have an integral mounting seal inside the non-pressure housing that prevents dust or water from reaching the caliper.
The Brake Chambers are used on axles fitted with drum brakes. The single diaphragm cylinder provides braking feature for the operation.