When brakes are applied, what occurs to the push rod?

When brakes are applied, the push rod is forced out of the brake chamber. This action is crucial in hydraulic and air braking systems, which rely on the push rod to actuate the brakes. As the brake pedal is pressed, it creates pressure that forces the push rod outward, engaging various components of the brake system. This is an essential step that helps to create the necessary friction between the brake pads and the brake rotors or drums, ultimately allowing the vehicle to slow down or stop. The dynamic movement of the push rod directly correlates with the operation of the braking system, ensuring effective braking performance. Understanding this mechanism is vital for anyone involved in commercial vehicle inspections, as it highlights how critical each component is in the overall functionality of a vehicle's braking system.