Remove air from the system first from one circuit, then from the other, starting with the rear brake wheel cylinders.
1. Remove the cap from the air bleed nipple head.
2. Place a transparent hose for draining the fluid onto the head of the fitting, and lower its free end into a transparent container partially filled with brake fluid. The container should be located at a height of 300 mm higher than the level of the air bleed fitting.
3. Press the brake pedal sharply several times and, holding it pressed, unscrew the air bleed nipple by half a turn. Continuing to press the pedal, force out the liquid in the system together with the air, through the hose into the container. After the pedal reaches the forward extreme position and the liquid flow through the hose stops, screw the air bleed nipple all the way in. Repeat these steps until air bubbles stop coming out through the hose.
4. Install the cap on the air bleed nipple.
Attention! When removing air, monitor the presence of liquid in the tank, not allowing its bottom to be exposed, as this will allow air to enter the system again.