702-21-58900 Solenoid Valve for Komatsu PC130-8 PC138USLC-8 Excavator Hydraulic Control System Repair Parts Product Detailed Description Optimize Your Excavator with Reliable Control Furthermore, the 702-21-58900 solenoid valve serves as a cornerstone of the Komatsu Dash-8 electronic hydraulic system. Because this valve manages the flow of hydraulic oil to the control spools, it prevents erratic machine behavior. Therefore, replacing a failing …