Sumitomo SH220A3 Swing Motor Seal Kit

This swing motor seal kit is engineered to meet OEM specifications for the Sumitomo SH220A3 and SH220-3 hydraulic excavators. It provides a complete sealing solution for the swing motor hydraulic circuit, preventing internal leakage and maintaining slewing torque efficiency. The kit includes precision-molded NBR (Nitrile Butadiene Rubber) O-rings, backup rings, piston seals, and dust seals designed to withstand high-pressure hydraulic oil environments. Materials are selected for compatibility with mineral-based hydraulic fluids and resistance to extrusion under peak circuit pressures typical of 22-ton class excavators. Installation restores original sealing integrity of the swing motor assembly.