- It is not recommended to use fluid drained from the brake system to fill the replenishment reservoir, as it is saturated with air and moisture and may be contaminated.
- Always use only genuine DOT 3 or DOT 4 brake fluid.
- Using non-original brake fluid may cause corrosion and reduce the service life of the brake system. Avoid mixing the recommended fluid with other types of brake fluid.
- Brake fluid is hygroscopic, that is, it absorbs moisture from the air, and therefore it is not recommended to use fluid stored for a long time in an open container.
- Brake fluid dissolves paint and plastic, so if the fluid gets on your car's paintwork, rinse it with plenty of water.
- Before bleeding the hydraulic brake drive system, add brake fluid to the reservoir up to the MAX mark and check its level after bleeding each caliper.
Bleeding the master brake cylinder
- This master cylinder does not have a check valve, so if you bleed the master cylinder using the following method, the procedure for bleeding the hydraulic brake system will be much easier.
1. Fill the reservoir with brake fluid.
2. Press the brake pedal and hold it in the initial position.
3. Ask the Assistant to use his finger to close the outlet hole of the master brake cylinder (Fig. 15.16).
Fig. 15.16. Closing the outlet of the master cylinder when bleeding the hydraulic brake drive system
4. Keeping the outlet closed, release the brake pedal.
5. To fill the inner surfaces of the master cylinder with brake fluid, repeat the operations given in points 2-4 three or four times.
Bleeding brake circuits
- Bleed the brake circuits in the sequence shown in Figure 15.17.
Fig. 15.17. Sequence of bleeding the brake circuits (the sequence of bleeding for right-hand drive vehicles is shown in brackets)