1. The underside of the vehicle must be dry to be able to identify leaks.
2. Check up branch pipes and connections of hoses and pipelines, and also brake supports. Pay attention to dark and wet spots.
3. Check the brake hoses. The hoses must not be frayed, the hoses must not be wet or swollen. Replace defective hoses.
4. Clean the brake pipes with an aerosol cleaner. Pipelines are covered with a layer of polymer to protect against rust, so never use screwdrivers, sandpaper or a wire brush when cleaning. If the protective layer is damaged, apply a thin layer of anti-corrosion primer to the damaged area. If there are corrosion pits or deformations on the brake lines, replace the lines.
5. Check for caps on all air valves on brake calipers.
6. Produce (impromptu) checking brake pressure. Within a minute, press the brake pedal with full force - the pedal should not go down, otherwise one of the cuffs in the master brake cylinder is likely to malfunction. Of course, you can accurately check the pressure only in the workshop.
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