Brake Fluid: Description and Operation

Brake Fluid

Brake fluid is hygroscopic, i.e. it has the capability to absorb water and moisture from the air.

If water has been absorbed, the boiling point will drop, i.e., during high braking temperatures the brake fluid may develop steam bubbles and result in decreased brake performance.






Over time, brake fluid will darken in color. This is a normal chemical reaction and does not reflect on their quality.

The rubber components of the brake system (boots, seals) do not tolerate mineral oil, gasoline, and cleaning agents! Small amounts on the protective boot or sealing ring leads to a change in the parts and affects brake function.