Driving in rain weather, will inevitably be silt, muddy water invasion, at this time the most affected is the brake system, brake disc and brake disc are usually exposed to the air, affected by muddy water, easy to accelerate the wear degree, serious will cause brake failure.

Braking is the process of producing braking effect by friction. The wheel brake is the main component that converts kinetic energy into heat energy. Its principle is the brake disc and brake disc pressure together, through friction braking effect.

The brake disc is made of alloy cast iron. The material of brake pads is wear-resistant asbestos. It has high temperature resistance and high friction coefficient. In the operation of the vehicle, there is a certain gap between the two parts to prevent brake hair bite block. It is because of this gap, so when wading, water and sediment and other dirty debris into the gap, resulting in a sharp decline in the friction coefficient, braking effect is minimal. If in an emergency situation, the sudden brake is sure to brake, so after the impact of muddy water must clean the debris of the brake clearance, restore the braking effect.