The air compressor is inflated, the air tank is stored to form pressure, and the brake master cylinder is stepped on to make the compressed gas enter the afterburner pump. The gas pushes the piston of the afterburner pump, and the piston pushes the brake oil to form pressure. The brake oil push is set at the front and rear. The brake cylinder pistons of the two axles push the brake pads to increase the friction between the brake discs and the brake pads, thereby braking the entire vehicle! https://www.dtsanyparts.com/whee...-for-lonking-lg855n.html