Brake fluid easily absorbs moisture, which helps to lower its boiling point and at the same time increases the likelihood of corrosion of brake system components. Therefore, it is recommended to change the brake fluid annually.
The process of replacing the brake fluid as a whole is similar to pumping the system. The main difference is that when changing the brake fluid, it should be poured from new sealed containers, and after the reservoir is filled, the assistant should pump the brake pedal about 10 times, while you open the drain screw on each brake fluid in turn. brace (caliper). This will ensure that all lines are filled with fresh brake fluid.