If only one brake wheel cylinder or one brake caliper has been removed, it may be sufficient to bleed only the respective brake circuit, i.e. on the left front and right rear wheels or on the right front and left rear wheels. If this is not the case, then you can start bleeding either on the rear or front wheels, but the following sequence is recommended: rear right wheel, rear left wheel, front right wheel, front left wheel. In the process of removing air, it is necessary to add brake fluid to the reservoir and constantly monitor its level in the reservoir.
Put on a transparent plastic hose (2) to the corresponding bleed valve (1), after removing the dust cap. Lower the other end of the hose into a glass vessel (3) slightly filled with brake fluid.
Have an assistant depress the brake pedal and keep it pressed against the floor. Open the bleed valve half a turn. Observe the brake fluid flowing out of the hose, and when there are no more air bubbles in the outlet fluid, this means that all the air has left the circuit. While holding the pedal down, close the bleed valve. Slowly release the pedal, and Carry out similar operations on the remaining wheels, following the above sequence.
It should be recalled once again that it is necessary to constantly monitor the level of fluid in the tank so that air does not enter the system due to its low level. Never reuse fluid that has escaped from the system during the bleed process. Do not use a liquid that has been stored for a long time in an open container. Use only recommended grade brake fluid.
Brake Fluid Replacement
Put the bleed hose on the bleed valve, lower its end into the vessel and open the bleed valve. Press the brake pedal until no more brake fluid comes out. Do this operation on all valves.
To fill the system, proceed in the same way as for bleeding, but this should only be continued until the brake fluid comes out of the bleed valves without air bubbles.
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