Spring brakes and air brakes differ in their application.
Air brakes and spring brakes in a larger vehicle, typically a Motor lorry or bus, sometimes are last the twin trundle and bestow the equivalent axle. On the contrary, one is used for parking and one for slowing down.
Spring BrakesSpring brakes in a large vehicle are used to park the truck, much like a parking brake in a car. This type of brake uses springs to lock the brake in place. The driver controls the spring brakes, which are held in place with air pressure, by releasing the air pressure to allow them to engage.
Air brakes are typically used for routine slowing of a weighty vehicle. They ride nearly matching to a motorcar brake, apart from an air compressor, jog by the engine, is used instead of brake fluid to utilize energy to the brake drums. The air is pumped into an air Hospital ward in the brake that causes the braking action. In large trucks, the human leg simply does not have enough power to hold the braking action, so air pressure is used instead.
Incorrectly installed or adjusted spring brakes will not work properly, if at all. Spring brakes are also used as emergency brakes.
Spring Brakes as Emergency Brakes
The spring brakes act as the emergency brake in the event of air pressure failure. The springs in the spring brake assembly are held back by air pressure. If any leak in the air line or complete air pressure failure occurs, the springs engage the brakes. Any loss of air pressure means a loss of air brakes.