Product Overview This hydraulic main pump, available under part numbers 584-0379, 593-3840, 627-1302, and 30R-0199, is the primary hydraulic power unit engineered specifically for the E374GC excavator hydraulic system. It delivers high-pressure hydraulic oil to drive the boom, arm, bucket, travel, and swing assemblies. Built with a variable piston structure, precise flow control, wear-resistant alloy materials, and precision machining, this pump offers direct replacement