As wheel cylinders expand, what happens to the brake shoes?

When wheel cylinders expand, they push the pistons inside the cylinders outward. This action forces the brake shoes to move towards the brake drum. As the shoes come into contact with the drum, they create friction, which is essential for slowing down or stopping the vehicle. This movement of the brake shoes toward the drum is a crucial part of the braking process, ensuring that the vehicle is able to effectively decelerate.

In this context, understanding the dynamics of hydraulic systems is key. The expansion of the wheel cylinder illustrates the principle of hydraulic force being transmitted throughout the brake system, which is fundamental for the operation of drum brakes. The proper functioning of this mechanism is critical for vehicle safety, as effective brake engagement directly influences stopping power and control.