Brake actuators are the devices that convert the compressed air force within a truck or trailer's air reservoir into a mechanical force, which activates the brake. ... “That air moves through the actuator, triggering a relay valve that converts the air pressure into physical braking force.
What is a hydraulic brake actuator?
Hydraulic Trailer Drum Brake Actuators Surge Brake Actuator systems work by the "surge" or "push" of the trailer toward the tow vehicle during deceleration which automatically synchronizes the trailer brakes with the tow vehicle brakes.
How does a hydraulic brake work?
Brake hydraulics A hydraulic brake circuit has fluid-filled master and slave cylinders connected by pipes. The master cylinder transmits hydraulic pressure to the slave cylinder when the pedal is pressed. When you push the brake pedal it depresses a piston in the master cylinder , forcing fluid along the pipe.
Why must air be excluded from hydraulic system?
Essentially, hydraulic pumps are not designed to pump air because when compressed air generates heat. When air contaminates a hydraulic fluid, usually via the pump's inlet, aeration, cavitation, or foaming can occur.Jul 27, 2020
Why is it important to not have air in the brake system?
Air is the enemy in a hydraulic system because it reduces pressure and essentially makes the process less effective. When air gets into the brake lines, your brake system suffers. ... Brakes feel soft and not as effective as they usually are. Brake pedal depressed too much or goes to the floor.Jul 29, 2020