Checking the tightness of the hydraulic brake drive (Priora 2170)

To prevent sudden failure of the brake system, carefully check the condition of all lines at each maintenance. Replace parts with new ones if there is the slightest doubt about their suitability. All rubber parts of brake assemblies (hoses, cuffs, etc.) regardless of their condition, replace them with new ones after 100,000 km or 7 years of operation (whichever comes first), to prevent sudden ruptures due to aging.

According to the manufacturer's recommendation, the brake fluid should be replaced after 45 thousand km of mileage or 3 years of operation (whichever comes first).

Note: Brake fluid is very hygroscopic and absorbs moisture from the air, which, in addition to causing corrosion of brake system parts, lowers the boiling point of the fluid itself, which can lead to brake failure during frequent, intensive braking. Therefore, we recommend replacing the brake fluid at least once every 2 years.

Check the tightness by external inspection:

from above, from under the hood;
from below the car (on a lift or inspection pit);
from the sides of the car with the wheels removed.

Note: When inspecting the hydraulic drive part that operates under pressure, have an assistant. He should press the brake pedal four or five times (in order to create pressure in the hydraulic drive) and keep it pressed while you inspect the hydraulic drive.

Note: Inspection of a hydraulic drive without pressure is acceptable but less effective.

Note: If you find any leaks in the connections, tighten the clamps, plugs, and nuts.

Note: Replace hoses and pipelines with mechanical damage.

Note: If wheel cylinders are found to be leaky, replace them.

You will need: a 15 mm wrench, a special wrench for pipeline fastening nuts, or a 10 mm wrench.

This is what a special key for pipeline fastening nuts looks like.

1. Inspect the master cylinder reservoir and the pipe connections to the master cylinder.

2. Check for fluid leaks from the brake pipe connections with tees...

3. ...and with a pressure regulator. If leaks are detected, tighten (with a special key) brake pipe tips.

4. Carefully inspect the brake hoses. They should not have cracks, tears or signs of wear. Press the brake pedal all the way down. If there are any bulges on the hose, it means that the threads of the hose braid have broken and it needs to be replaced.

5. Check the fastening of the pipelines in the holders. Loosening or breaking of the holders leads to vibration and, as a result, to failure of the pipelines.