4.5.7. Replacement of working liquid in the brake system

Replace brake fluid in a hydraulic actuator of brakes through each 45 thousand km of a run or 3 years of operation (depending on what will come earlier).
For gas station of system use the glycoleft brake fluids with parameters on FMVSS 116 not below DOT-3.
Before replacement of brake fluid check tightness of a hydraulic actuator (see. "Check of tightness of a hydraulic actuator of brakes") also eliminate malfunctions.
It will be required to you: a key "on 8", brake fluid, a flexible tube, a vessel for collecting brake fluid, a pure rag.

Preventions
1. Observe precautionary measures during the work with brake fluid: it is toxic. Hit of brake fluid on wires, the plastic or painted details of a body can cause their damage. Therefore when filling always enclose pure rags. At hit of liquid on a detail at once wipe them with a pure rag.
2. Use only brake fluid recommended by manufacturer.
3. Do not reuse the liquid merged from system: it is polluted, saturated air and moisture. Always add only new liquid of that brand which was filled in before in system.
4. Brake fluid is hygroscopic (absorbs moisture from air) therefore it cannot be stored in an open container.

1. Turn off a cover of a tank of the main brake cylinder and wipe a float with a pure rag. Be careful: from a float brake fluid can drip.
2. If back wheels are hung out, previously unblock the regulator of pressure of back brake mechanisms, having inserted the screw-driver between a plate and the piston. Do not forget to take out it upon termination of work.
3. Clear the valve of production of air of the right back brake mechanism of dirt. Remove a rubber protective cap from the valve.
4. Put on a rubber hose (it is recommended to use a transparent hose to see a condition of the following liquid) on the union of the valve and ship the end of a hose in a pure transparent vessel.
5. The assistant has to press sharply a pedal of a brake of 4-5 times (with an interval 1–2 with between pressing). After the last muscleman it is necessary to hold a pedal pressed.
6. Unscrew the valve of production of air on 1/2–3/4 turns. Old (dirty) brake fluid will begin to follow from a hose. At the same time the pedal of a brake has to reach smoothly against the stop. As soon as liquid ceases to follow, wrap the valve of production of air.
7. Constantly you watch liquid level in a tank, without allowing its decrease tags of "MIN" are lower, and if necessary add new brake fluid. Repeat operations 5 and 6 until new (pure) brake fluid begins to follow from a hose.
8. Replace with the same way brake fluid in the left forward brake mechanism, and then in the second contour (at first in the left back brake mechanism, then in the right forward).
9. Press several times a brake pedal. The course and resistance of a pedal have to be constants by each pressing. If these conditions are not satisfied, so air got to the brake system and it needs to be pumped over (see. "Pumping of a hydraulic actuator of the brake system").
10. After replacement of brake fluid surely put on protective caps valves of production of air.
11. Add brake fluid in a tank to a tag of "MAX" and wrap a cover.