This seal kit contains the elastomeric seals and wiper rings for the hydraulic cylinder that operates the three-point hitch. It sits between the cylinder barrel and the piston rod, containing hydraulic fluid under pressure and excluding external contaminants. A leaking cylinder causes the hitch to drift or drop under load, and worn seals allow fluid bypass that reduces lifting capacity. The kit matches the original groove geometry and rubber compound specified for the cylinder, so the seal stack maintains the correct interference fit against the rod surface. On installation, clean the rod and cylinder bore, lubricate the seals with clean hydraulic fluid, and torque the cylinder end cap to specification.