In the engine compartment above the master brake cylinder is a brake fluid expansion tank that provides brake fluid to the entire brake system.
The hydraulic booster accumulates part of the depression produced in the engine intake system (on diesel engines, vacuum is created by a vacuum pump). Then, as needed, the force on the brake pedal is increased through the booster valve.
All disc brakes have what are called floating calipers. In a floating caliper, only one piston is required to press both brake pads against the disc.
The handbrake through the cable acts on the rear wheels. Since disc brakes are not suitable for operation as a parking brake, brake drums are installed in the brake discs in addition to operating the hand brake. The drum brakes operate exclusively as a parking brake, controlled by the handbrake lever.
When cleaning the brake system, brake dust is released. This dust can lead to health problems. Therefore, when cleaning the brake system, take care not to inhale brake dust.
Brake pads are elements of the General Permit to Operate, in addition, they are produced by the manufacturer in various types for various car models. Therefore, it is recommended to use only brake pads recommended by BMW or the Federal Motor Transport Authority. Brake pads have an Office approval number.
When buying brake pads, it is recommended to purchase brake pad wear sensors at the same time, since the sensors installed on the car can also be worn out.
Work with the brake system requires accuracy and strict adherence to the instructions for their implementation. In the absence of experience in carrying out such work, it is better to carry them out at a service station.
Used, old brake fluid should be taken to a special waste collection point, and not just thrown away or thrown away with household waste.
Note: When driving on very wet roads, apply the brakes from time to time to free the rims from deposits. Although under the action of centrifugal force during movement, water is thrown away from the brake discs. partially a thin film of silicones, rubber dust, grease and dirt remains, reducing the braking effect.
When parking the car after driving in the rain, especially in winter with special effects on the road, it is advisable to stop the car by lightly pressing the brake pedal. Thanks to this, the brake discs are dried and will not corrode intensively.
After installing new brake pads, they need to be allowed to run in. During the first 200 km, sudden braking to a complete stop should be avoided. On the other hand, the brake discs must work, otherwise favorable conditions will be created for corrosion of the brake discs and contamination of the brake pads.
Corroded brake discs produce a shaking and noisy effect that persists even after repeated braking. In this case, the brake discs must be replaced.
Burnt dirt and clogged rain grooves on the brake pads cause scratches on the brake discs. This causes a reduction in the braking effect.