- The system works like this:
- the brake pedal is connected to the master brake cylinder;
- when the pedal is pressed, fluid under pressure from the brake master cylinder is transferred through metal tubes and flexible hoses to the front and rear brakes;
- working brake cylinders are hydraulic modulators that convert the fluid pressure created in the main brake cylinder into movement of the elements of the brake mechanism;
- the front and rear pistons of the brake caliper move and, due to friction on the brake discs and drums, provide the required deceleration of the car;
- when the brake pedal is released, the pressure in the system decreases. The brake pads and pistons return to their neutral or rest position and braking stops.
When the brake fluid level decreases, the fluid level sensor in the master brake cylinder turns on a warning lamp in the instrument cluster. If the warning lamp is on, first of all, check that the parking brake is released, as the lamp indicates a low fluid level and a tightened parking brake.