Product Overview This hydraulic main pump, available under part numbers 251-8030, 251-8031, and 207-4708, is the primary hydraulic power unit engineered specifically for the M315D wheel 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