Product Overview This hydraulic main control valve, with part numbers 295-7747 and 295-7748, is the primary hydraulic distribution unit specifically engineered for the hydraulic systems of E374D, E385C, and E390D excavators. It distributes high-pressure hydraulic oil to control boom, arm, bucket, travel, and swing movements. The valve features a multi-channel valve block structure, precision-matched spools, wear-resistant alloy materials, and precision machining. It is