Clean the brake lines with a cold cleaner.
Attention! The brake pipes are coated with a synthetic coating for corrosion protection. If this coating is damaged, corrosion of pipelines occurs. Therefore, do not clean the pipelines with a wire brush, emery cloth or screwdriver.
Check with a lamp the brake lines from the master cylinder to the individual brake calipers. The master brake cylinder is located in the engine compartment under the brake fluid reservoir.
Brake lines must not be bent or dented, and must not be rusted or frayed. Otherwise, replace the brake pipe to the nearest connection.
Brake hoses connect brake lines to brake calipers on moving parts of the vehicle. They are made of high pressure resistant material but can become porous over time, swell or be cut with sharp objects. In such cases, they should be replaced immediately.
Bend the brake hoses sideways by hand to check for damage. The hoses must not be turned.
Turn the steering wheel left and right as far as it will go. The brake hoses must not rub against the car parts.
Elements for connecting brake pipelines and hoses must not be wet from escaping brake fluid.
Attention! If the supply reservoir and seals are wet from escaping brake fluid, this does not necessarily indicate a problem with the brake master cylinder. Most often, brake fluid can escape through the vent in the cap or through the cap seal.
Lower the car to the ground.
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