Hydraulic Master Cylinder 3/4″

The 3/4″ master cylinder is designed to be used on a majority of trailers that are utilising a hydraulic brake system. It is the pivotal part of your brake system which activates your brakes, so it is important to use DOT 4 brake fluid. It is used in conjunction with a override coupling to activate your trailer’s hydraulic brakes. You can use stainless steel or normal brakes lines with this product. Please note you may need an Apdapter Master Cylinder (AMC) if you find your brake line is moving or leaking.