Claas - CL7700047394 - O-Ring

This O-ring seals the connection between the drive-system housing and its mating cover, preventing hydraulic fluid leakage at that joint. It sits in a machined groove on the housing face and compresses against the cover when the fasteners are tightened. A hardened or nicked O-ring allows fluid to weep past the seal, which can lead to pressure loss and aeration in the circuit. The manufacturer's material formulation matches the original compound used in the assembly, so the seal maintains its designed compression set over the service interval. On reinstallation, clean the groove surface and apply a light film of assembly lubricant to prevent the ring from rolling or pinching during torquing.