702-21-57700 Hydraulic Pump Solenoid Valve for Komatsu PC200-7 PC220-7 Excavator Main Pump Contro System Replacement Parts Product Detailed Description Enhance Excavator Productivity with Reliable Control Furthermore, the 702-21-57700 solenoid valve serves as a vital link in the Komatsu Dash-7 electronic hydraulic circuit. Because the valve modulates the flow of hydraulic oil, it prevents the main pump from overloading the engine. …