This seal kit contains the washers and O-rings needed to rebuild the hydraulic cylinder that controls the rear three-point hitch. It sits between the cylinder housing and the piston rod, sealing the pressurized oil that lifts and holds the implement. A worn seal set causes the hitch to drift downward under load or fail to maintain position. The kit includes every elastomer and washer that contacts the cylinder bore and rod, so replacing all of them at once restores the original sealing geometry. On installation, clean the cylinder bore and rod surface, lubricate the new seals with hydraulic fluid, and torque the retaining nut to the specification for the host tractor.