702-21-55600 Hydraulic Pump Solenoid Valve for Komatsu PC200-7 PC220-7 PC300-7 Product Overview The 702-21-55600 Solenoid Valve is a critical pilot control component for the main hydraulic pump on Komatsu excavators and dozers. It plays a vital role in modulating the pump displacement to match the workload, preventing engine overload and hydraulic lag. Our aftermarket version is built with premium materials …