Attention! Use only DOT 3 or DOT 4 brake fluid.
Avoid mixing the recommended fluid with other types of brake fluids.
Removal of air from the main brake cylinder
There is no check valve on the main brake cylinder, therefore, if you remove air from the main cylinder using the following method, the procedure for bleeding the hydraulic brake system will become much easier (provided that there is no brake fluid in the master brake cylinder).
1. Fill the reservoir with brake fluid.
2. Press and hold the brake pedal.
Pic. 14.6. Closing the outlet of the master cylinder with a finger when pumping
3. Have an assistant cover the master cylinder outlet with a finger (pic. 14.6).
4. Keeping the outlet closed, release the brake pedal.
5. To fill the internal planes of the master cylinder with brake fluid, repeat the operations described in paragraphs 2-4 three or four times.