The pistons displace the brake fluid in the cylinder. The resulting hydraulic pressure is distributed in the brake system via lines and hoses to the wheel cylinders.
In cylinders, pistons press the brake pads against the brake discs or, on the rear wheels, the brake pads against the brake drums.
Fluid pressure is transmitted to the brake cylinders through two independent pipelines (brake circuits).
If one circuit fails, the other circuit remains operational.
Manual (parking) the brake acts through the cables on the rear wheels.
Attention: If one of the brake circuits fails, it is necessary to press the brake pedal with more force (with longer pedal travel), to get the same brake performance.
Brake system diagram (models with rear drum brakes)
1 - front wheel brake;
2 - main brake cylinder;
3 - vacuum amplifier;
4 - parking brake;
5 - rear wheel brake;
6 - pedal.
Brake system diagram (models with rear disc brakes)
1 - pedal;
2 - vacuum amplifier;
3 - expansion tank;
4 - main brake cylinder;
5 - front wheel brake;
6 - rear wheel brake.
Attention: The parking brake is not shown by convention.