This gasket set seals the connections in the hydraulic system of a round baler. It prevents fluid leakage at the joints between the pump, valves, and cylinder ports. A failed gasket here causes external oil seepage and a gradual loss of system pressure, which reduces bale density and slows cycle time. The set includes all the sealing rings needed for a full hydraulic-system reseal. On reinstallation, clean the mating surfaces and tighten the fittings to the specified torque to avoid extrusion of the new gaskets.