4.2.9. Check of tightness of a hydraulic actuator of brakes

For the prevention of sudden failure of the brake system at each maintenance carefully check a condition of all pipelines. Replace details new if there is the slightest doubt in their suitability. Irrespective of their state replace all rubber details of brake knots (hoses, cuffs and so forth) new through 100 000 km of a run or 7 years of operation (depending on what will come earlier) to warn their sudden gaps because of aging.
According to the recommendation of manufacturer to replace brake fluid follows through 45 thousand km of a run or 3 years of operation (depending on what will come earlier).

Note
Brake fluid is very hygroscopic and absorbs moisture from air that besides emergence of corrosion of details of the brake system lowers temperature of boiling of the liquid, and it can lead to refusal of brakes at frequent intensive braking. Therefore we recommend to replace brake fluid at least once in 2 years.

Check tightness external examination:
– from above from under a cowl;
– from below the car (on the elevator or an osmotrovy ditch);
– from car sides with the removed wheels.

Good advice
You carry out survey of the part of a hydraulic actuator working under pressure with the assistant. He has to press four-five times a brake pedal (to create thus pressure in a hydraulic actuator) and to hold it pressed until you examine a hydraulic actuator.
Survey of the hydraulic actuator which is not under pressure, let us assume, but is less effective.


Notes
At detection of leakage of connections tighten collars, caps, nuts.
Replace hoses and pipelines with mechanical damages.
At detection of leakage of wheel cylinders replace them.

It will be required to you: a key "on 15", a special key for nuts of fastening of pipelines or a key "on 10".
So the special key for nuts of fastening of pipelines looks.
1. Examine a tank of the main cylinder and connection of pipelines with the main cylinder.
2. Check whether there is no dribble of liquid from connections of brake tubes with tees...
3.... and with pressure regulator. At detection of leaks tighten (a special key) tips of brake tubes.
4. Carefully examine brake hoses. They should not have cracks, anguishes and traces of wiping. Press against the stop a brake pedal. If on a hose swellings developed, so threads of a braid of a hose tore and it needs to be replaced.
5. Check fastening of pipelines in holders. Easing or breakage of holders lead to vibration and, as a result, to breakage of pipelines.
6. Examine connections of a hose with the bringing tube and the wheel cylinder, and also the union for production of air of brake mechanisms of lobbies...
7.... and back wheels.
8. Examine a state and connections of a hose with the bringing tube of back brake mechanisms.