DD-3 Brake Actuators

DD-3 brake actuators are dual-diaphragm, air-operated chambers engineered for heavy-duty applications requiring service, emergency, and parking brake functions. Unlike standard spring brakes, the DD-3 features a mechanical push rod lock system that automatically engages when air pressure is lost, ensuring fail-safe brake application. Its unique roller-and-wedge locking mechanism is activated through a dedicated lock port, providing dependable retention in emergency conditions. Commonly used on buses, specialty vehicles, and military equipment, Fleet Products’ DD-3 actuators deliver critical stopping power, long service life, and OEM-quality reliability.