What is a key difference between hydraulic and mechanical brake systems?

Hydraulic systems rely on fluid pressure to transmit force, which is a fundamental characteristic that differentiates them from mechanical systems. In a hydraulic brake system, when the brake pedal is pressed, the force is applied to brake fluid, which is incompressible. This fluid, under pressure, travels through tubes and actuates the brake components at the wheels, leading to effective braking performance. The use of fluid allows for a more even distribution of force and greater stopping power with less physical effort required from the driver.

In contrast, mechanical systems typically use physical components like cables and linkages where force is transmitted through solid materials. This method can result in inefficiencies due to friction and the potential for stretching in cables over time. Understanding this distinction is crucial for technicians, as the choice between these two systems affects vehicle performance, maintenance, and repair procedures.