702-21-55901 Solenoid Valve for Komatsu PC220-7 PC300-7 D475A BP500 Product Detailed Description Optimize Your Machine with High-Precision Control Moreover, the 702-21-55901 solenoid valve acts as a critical link in the electronic hydraulic control system. Because it manages the flow and pressure signals to the main pump or control valve, it directly impacts your excavator’s responsiveness. Therefore, choosing a high-quality replacement …