Main Control Valve Multi-way Distributor of Hyundai R210-7 R215-7 R290-7 R300-7 R305-7 Excavator 31N8-19110 31N6-18001 Installation & Verification Guidelines Verify Hyundai part number and confirm main control valve assembly compatibility, including boom, arm, bucket, travel, swing spools, relief valves, and holding valves. New or remanufactured valves must include hydraulic bench test reports for pressure, flow, and internal leakage of each section. For remanufactured valves