Attention! When bleeding the brake system, take measures to protect your eyes. If brake fluid gets into your eyes, rinse immediately with plenty of water and consult a doctor.
1. Bleeding the brake system is necessary to remove the air that got into it when replacing pipelines, hoses, wheel cylinders or the master cylinder. Bleeding of all four wheel cylinders may be required if air has entered the system due to a low fluid level in the master cylinder reservoir, or when the pipelines are disconnected from the master cylinder.
2. If you disconnected the pipeline only from the wheel cylinder, it is necessary to pump only this wheel cylinder.
3. If you have disconnected the pipeline between the master cylinder and any of the wheel cylinders, it is necessary to bleed this part of the hydraulic system.
4. Press several times a brake pedal at the switched-off engine to remove underpressure from the vacuum amplifier.
5. Remove the master cylinder reservoir cap and fill it with brake fluid. Replace the cover.
The note During prorolling periodically check level of a brake liquid in a tank and add as required. Do not allow air to enter the master cylinder due to lack of brake fluid.
6. To bleed the brake system, you will need an assistant, fresh brake fluid, a transparent container, a rubber tube, the diameter of which corresponds to the diameter of the bleed screw, and a wrench to loosen and tighten the bleed screw.
7. To bleed air from all four wheels, start at the rear right wheel. Loosen the screw, then tighten it so that no liquid comes out, but the screw comes off easily.
8. Put one end of the rubber tube on the bleeder screw and release the other end of the tube into a transparent container filled with clean brake fluid (pic. 10.8).
9. Ask the assistant to press and hold down the brake pedal.
10. With the brake pedal depressed, unscrew the bleeder screw and watch the brake fluid with air bubbles come out of the rubber hose. After the fluid stops flowing out, tighten the bleed screw, and the assistant can release the brake pedal.
11. Repeat the procedure described in pl. 9 and 10 until no more air bubbles come out of the hose. Then repeat the bleeding procedure for the left front, then the left rear and right front wheels (in that order). Do not forget to periodically add brake fluid to the reservoir of the master cylinder.
12. Drink only fresh, clean brake fluid. Moisture accumulates in old brake fluid, impairing the effectiveness of the brake system.
13. After the end of pumping, add liquid to the reservoir of the main cylinder up to the MAX mark.
14. Check the operation of the brakes. At the end of the brake pedal stroke, a hard stop should be felt, without elasticity. If necessary. repeat the procedure for bleeding the brake system.
Warning. Do not drive on the road if you are not sure that the brake system is working properly.