Product Overview This hydraulic main pump, identified by part numbers 627-1304, 584-0380, 30R-0200, and 576-3072, is the primary hydraulic power unit engineered specifically for the E395GC excavator hydraulic system. It delivers high-pressure hydraulic oil to drive the boom, arm, bucket, travel, and swing assemblies. Built on a variable piston structure, the pump combines precise flow control, wear-resistant alloy materials, and precision machining. It is designed for direct