Kobelco SK55 Main Pump Seal Kit

This main pump seal kit is engineered for the hydraulic pump on Kobelco SK55 series mini excavators. The kit contains precision-molded seals, O-rings, and backup rings constructed from PTFE, NBR (Nitrile Butadiene Rubber), and iron anti-extrusion rings to withstand high-pressure hydraulic fluid environments. Designed as a direct replacement for the main hydraulic pump sealing assembly, it restores sealing integrity to prevent internal leakage and pressure loss. Compatible with SK55, SK55SR, SK55SRX, SK55-3, and SK55-6 variants powered by Yanmar 4TNV88 series diesel engines. Verification of pump model (e.g., AP2D18 or equivalent Kawasaki/Kayaba series) is recommended prior to installation.