When a truck makes a stop in case of an emergency, several tonnes of weight must be brought to a halt as quickly as possible. This can only be achieved with high-quality brake components and a good functioning brake system.
Due to their great weight, commercial vehicles require special braking systems. Trucks with a maximum gross weight of more than 7.5 t therefore almost always operate with compressed air braking systems.
The compressed air is controlled with pneumatic valves, such as foot-operated brake valve, four-circuit protection valve, or a trailer brake valve. The parking brake only releases when there is sufficient pressure in the system. In that case, the mechanical parts of the wheel brakes are applied when the driver steps on the brake pedal and the compressed air reaches the brake cylinders.
Also, there are two different braking systems in heavy commercial vehicles – disc brakes and drum brakes. Disc brakes do not have many moving parts. This makes it easier to make adjustments. And the maintenance is also easier compared to drum brakes.
Drum brakes, on the other hand, are more durable and are used, especially for off-road or construction site applications. Due to the enclosed design, these brake parts are ideally protected from dirt and corrosion caused by water and salt.
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