Sumitomo SH120-3 Swivel Joint Seal Kit

This hydraulic swivel joint seal kit is engineered for the center swivel joint assembly on Sumitomo SH120-3 and SH120A3 hydraulic excavators. The kit contains precision-molded shaft seals, O-rings, and backup rings designed to withstand high-pressure hydraulic fluid in the swing circuit. Primary shaft seal dimensions are 70 mm inner diameter, 95 mm outer diameter, and 13 mm height. Materials are selected for compatibility with mineral-based hydraulic oils and operating temperatures typical in construction machinery. The kit facilitates complete resealing of the swivel joint to prevent cross-contamination between hydraulic circuits and restore smooth swing operation.