DD-3 Brake Actuators

are specialized air brake components designed for heavy-duty vehicles such as trucks, buses, trailers, and tractors. Unlike traditional spring brake chambers, DD-3 actuators use a double-diaphragm design with a mechanical locking mechanism to provide service, emergency, and parking brake functions. They are commonly found on vehicles that require reliable parking and emergency braking without the use of large internal springs. 

  • : Provides braking for service, emergency, and parking applications.

  • : Internally, a locking roller mechanism holds the push rod in the applied position when air pressure is lost, ensuring the brake remains engaged for parking or emergencies26.

  • : Unlike standard spring brake chambers, DD-3 actuators have three air ports for service, emergency, and lock functions.

  • : Service brakes are applied via the brake pedal, while emergency and parking brakes are engaged using a control valve. Releasing the parking brake requires operating the control valve and then pressing the brake pedal for several seconds.

Subcategory of DD-3 Brake Actuators

8 of 8 Items
8 of 8 Items