2. Clean the brake lines with a low temperature cleaner.
Attention! To protect against corrosion, the brake lines are covered with a film of synthetic polymer. If the film is damaged, this can lead to corrosion of the pipelines. For this reason, the brake lines must not be cleaned with a wire brush, file or screwdriver.
3. While lighting with a lamp, check the brake lines from the master brake cylinder to the individual wheel brake cylinders. The master brake cylinder is located in the engine compartment under the brake fluid reservoir.
Attention! Brake lines must not be bent or compressed. They should also be free from corrosion pits and galling points. Otherwise, the piping to the nearest disconnect point must be replaced.
Attention! Brake hoses connect brake lines to wheel brake cylinders on moving parts of the vehicle. They consist of a material that is resistant to high pressure, but over time it can become porous, swollen or cut by sharp objects. In this case, these pipelines should be replaced immediately.
Attention! Bend the brake hoses back and forth by hand to determine if there is any damage. These hoses must not be twisted. Pay attention to the colored marking strip!
4. Turn the steering wheel all the way to the left and right. In this case, the brake hoses must not come into contact with the vehicle parts in any position.
5. The joints of the brake lines and brake hoses must not be wetted by escaping brake fluid.
Attention! If the reservoir and seals are wet with escaping brake fluid, this is not necessarily an indication of a master cylinder failure. Most likely, the brake fluid may seep through the vent in the cap or through the seal in the cap.
6. Lower the car.
7. Once again turn the steering wheel all the way to the left and right and check if the brake hoses in any position are in contact with the car parts.