This cylinder sealing ring is a solid replacement for the original seal, designed to prevent fluid leakage at the header and three-point hitch connections. It sits between the cylinder rod and the housing, maintaining hydraulic pressure in the lift circuit. A worn or degraded seal allows oil to bypass, causing slow or incomplete implement movement and reducing system pressure. The manufacturer machines this ring to match the original seal groove geometry, ensuring proper compression without over-tightening. On installation, inspect the groove for debris or scoring and lubricate the ring before assembly.