This seal kit contains the o-rings, wiper seals, and backup rings needed to rebuild the hydraulic cylinders in the three-point linkage. It sits between the cylinder barrel and the piston rod, containing the hydraulic pressure that lifts and holds the implement. A leaking seal causes the linkage to drift downward under load, reducing hitch accuracy. The kit matches the original groove dimensions and material grade, so the piston rod slides freely without bypass leakage. On installation, clean the cylinder bore and rod surface, and lubricate the new seals with hydraulic fluid before assembly.