General Foot Brake, Front And Rear

When braking, the driver presses the brake pedal and an increased hydraulic fluid pressure is generated in the brake system. The increased pressure presses the piston and the inner brake pad against the brake disc at the same time as the brake caliper and the outer brake pad are pressed against the brake disc.

The dust boot (11) prevents dirt getting in between the cylinder and piston

The splash guard prevents water and salt from soiling the brake disc. Any soiling results in reduced friction and hence impaired braking power.

Certain vehicles have an electric parking brake on the rear wheel brakes. The electric motor is on the caliper and affects the piston mechanically, which then presses the pads together.