This sealing ring is an original AGCO component for the hydraulic system of the host tractor or self-propelled forage harvester. It sits between two mating faces in the hydraulic circuit, where it prevents fluid leakage under operating pressure. A degraded or improperly seated ring allows oil to bypass the sealed joint, leading to pressure loss and reduced hydraulic response. The ring is manufactured to the same cross-section and hardness as the original assembly, so it seats correctly in the groove without requiring additional shimming or sealant. On installation, ensure the sealing surfaces are clean and free of burrs, and replace any gasket or O-ring disturbed during disassembly.