Product Overview This hydraulic main piston pump, available under part numbers 214-3243, 221-3667, and 221-3668, is the primary hydraulic power unit specifically engineered for the hydraulic systems of D5G and D4G dozers. It delivers high-pressure hydraulic oil to drive the blade, tilt, and travel assemblies. Built with a variable piston structure, the pump features precise flow control, wear-resistant alloy materials, and precision machining. It is designed for direct