Product Overview This is an original-specification swash-plate variable-displacement axial piston pump, model HK5V160DTH-9N4A, specially fitted for SY285, SY330, and SY385 excavators. It adopts a tandem variable piston pump structure with a pilot gear pump, acting as the main hydraulic power unit of the excavator. It supplies steady hydraulic oil for the boom, arm, bucket, and travel hydraulic circuits. Technical Specifications Pump Model HK5V160DTH-9N4A Type Swash-plate