Attention! When removing air, constantly monitor the presence of brake fluid in the tank, not allowing its bottom to be exposed, as this will allow air to enter the system again.
Bleeding the hydraulic brake drive is necessary to remove air, which significantly reduces braking efficiency. Air can get into the hydraulic drive due to depressurization of the system during repairs, replacement of individual components or brake fluid. The presence of air in the drive is indicated by an increased stroke of the brake pedal and its softness. Before removing air, check the tightness of all brake drive units and their connections.
1. Remove the dust cap from the wheel cylinder bleeder, clean it and put a clean transparent hose on it, lower the other end into a container partially filled with brake fluid.
2. Press the brake pedal sharply 3-5 times with an interval of 2-3 seconds. Loosen the bleed screw half a turn while holding the pedal down. Continuing to press the pedal, force the fluid in the system together with air through the hose into a container. Once the pedal has reached its full forward position and fluid has stopped flowing through the hose, screw the bleeder in until it stops. Repeat these operations until the air flow from the hose stops.
3. While holding the pedal down, screw in the bleed screw until it stops and remove the hose.
4. Wipe the bleeder valve and install the protective cap.
5. Repeat these operations for other wheels.
6. If there is no air in the brake system, the pedal should travel about half of its travel. To eliminate the influence of the vacuum booster on the pitching of the brakes, remove the air with the engine off.