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.
Bleed the entire brake drive system in the following sequence:
- right front wheel;
- left front wheel;
- right rear wheel;
- left rear wheel.
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. The container must be at least 300 mm above the bleeder port. This prevents air from entering the cylinder through the bleed screw threads.
2. Press the brake pedal sharply 3-5 times with an interval of 2-3 seconds, unscrew the bleeder valve half a turn while pressing the pedal. Continuing to press the pedal, force the fluid in the system together with air through the hose into a container.
3. 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.
4. While holding the pedal down, screw in the bleed screw until it stops and remove the hose.
5. Wipe the bleeder valve and install the protective cap.
6. Repeat these operations for other wheels.
Attention! When removing air, constantly monitor the presence of brake fluid in the tank, avoiding exposing its bottom, because. this will allow air to enter the system.
7. 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 pumping the brakes, remove the air with the engine off.