Clean brake lines.
Attention: The brake pipes are coated with plastic to protect against corrosion. If the protective layer is damaged, this can lead to corrosion of the pipelines. For this reason, pipelines must not be cleaned with a metal brush, sandpaper or scraped with a screwdriver.
Using a lamp, inspect the pipelines from the brake master cylinder to the wheel cylinders. The master brake cylinder is located in the engine compartment under the brake fluid reservoir.
Bends or crushing of pipelines, traces of corrosion or chafing are not allowed. If these defects are present, the pipelines must be replaced.
Brake hoses connect the brake pipes to the wheel cylinders, compensating for their mutual movement. They are made from high strength material. However, over time, they can age, lose their properties, and be damaged by sharp objects. Damaged hoses must be replaced.
Check for damage by bending by hand. The hoses must not be twisted.
Turn the steering wheel right and left as far as it will go. The brake hoses must not touch the vehicle elements in any position.
Leakage of a brake liquid from hose connections is not allowed.
Caution: If the brake fluid reservoir is wet, this does not indicate damage to the brake master cylinder. Most likely, the brake fluid flows out through the vent in the reservoir cap.
Take the car off the lift.