2. Inspect all brake pipe fittings and hose connection points for signs of leaks. Remove the cap from the brake reservoir and check the brake fluid level. Check that the vent hole in the plug is not clogged.
3. Take measures to prevent brake fluid from getting on painted surfaces, as it corrodes paint very quickly.
4. You will need a supply of fresh brake fluid stored in a sealed container, a clean glass jar, a rubber or plastic tube that fits easily over the bleed nipple, and a wrench to operate the bleed screws. There are special devices that allow you to bleed the brakes yourself, but the easiest and most reliable way is to work together with an assistant who will press the brake pedal as needed. During the bleeding process, it is necessary to constantly monitor the fluid level in the brake reservoir. If it drops too low, air will enter the system, rendering all the work useless. The liquid that flows out of the system during the bleeding process cannot be reused.
5. Before starting bleeding, press the brake pedal several times to dissipate the residual vacuum in the brake booster. Thoroughly clean all bleed screws and fill the jar with brake fluid so that the layer height is approximately 25 mm.
6. Start with the rear left brake. Place the tube on the drain nipple and lower the other end into the jar so that it is covered with liquid (make sure that this end of the tube is constantly immersed in the liquid while pumping). Loosen the bleed screw about half a turn and have an assistant depress the brake pedal all the way and then let it rise to the top position. Wait a few seconds and repeat this operation again. To prevent liquid from the can from flowing back into the system, it is recommended to close the bleed screw before releasing the pedal and open it again when the pedal is pressed. If you are going to bleed the entire system, it is enough to do 3-4 full pumps on each wheel and then repeat the entire process. After every 3-4 strokes, add fresh brake fluid to the brake reservoir (the old one cannot be used). After the liquid in the tube no longer contains air bubbles, tighten the bleed screw, release the pedal and install the dust cover on the screw.
7. Continue bleeding until all 4 brakes are free of air. Check the system by pressing the brake pedal: it should provide a certain resistance to pressing, give in evenly under your foot, and under no circumstances should it fail. If it fails, then most likely the master cylinder seals are leaking (replace seals) or the master cylinder itself (this can happen if there are scratches on the inner walls of the master cylinder).
8. Take a test drive to check the operation of the brakes.