What is the primary function of S-Cam brakes?

The primary function of S-Cam brakes is to press the brake shoes against the brake drum. This braking system operates through a cam mechanism where the S-shaped cam, when rotated by air pressure, pushes the brake shoes outward against the drum. This action creates the necessary friction to slow down or stop the vehicle. The design of the S-Cam allows for effective force distribution, ensuring that the brake shoes make even contact with the drum for reliable braking performance.

Understanding how S-Cam brakes work is crucial for drivers, particularly those operating larger vehicles such as trucks and buses, where this type of braking system is commonly used. The proper function of S-Cam brakes ensures safety and efficiency in stopping power.