Aftermarket Main Pump Seal Kit for Hitachi EX270-1

This hydraulic main pump seal kit is engineered for the Hitachi EX270-1 excavator main hydraulic pump. The kit includes all necessary seals, O-rings, backup rings, and gaskets required for a complete main pump rebuild. Components are manufactured from high-grade NBR (Nitrile Butadiene Rubber) and PTFE materials compatible with mineral-based hydraulic fluids. The kit suits main pump models commonly found on the EX270-1 platform, including Kawasaki K3V112DTPK, K5V200DPH, and Kayaba HPV145DW/HPV145G series variable displacement piston pumps. Seals are rated for continuous operating pressures up to 35 MPa (350 bar) and peak pressures of 40 MPa. Operating temperature range is -30°C to +120°C. Dimensional tolerances meet OEM specifications for rod, piston, and housing seal grooves.