This set of sealing rings is a gasket kit for the three-point linkage assembly on agricultural tractors. It seals the hydraulic connections between the lift arms and the control valve, preventing fluid loss that would reduce lift capacity and cause slow implement response. The rings are positioned at the interface where the linkage attaches to the tractor chassis; a leak here allows air ingress, leading to spongy hitch operation and eventual pump cavitation. As an original AGCO component, the rings are molded to the same cross-section and durometer as the factory seals, so they seat correctly in the groove without requiring shims or adapters. On installation, clean the mating surfaces thoroughly and lubricate the rings with hydraulic fluid before seating.