Bleeding a master cylinder is the process of removing air from the hydraulic system of a vehicle’s braking system. Air can enter the system when brake lines are opened or disconnected, or when the master cylinder is replaced. If air is present in the system, it can cause the brakes to feel spongy or unresponsive.
Bleeding the master cylinder is a relatively simple process that can be done with a few basic tools. It is important to follow the manufacturer’s instructions for your specific vehicle, as the bleeding procedure may vary. Once the master cylinder has been bled, it is important to test the brakes to make sure they are functioning properly.