Zaxis-5 excavators incorporate improved hydraulic technology
Developed to reduce fuel consumption, the system uses three hydraulic pumps and a control valve, which efficiently divides the flow from the pumps into each actuator as required.
“Our target for the 20tonne Zaxis-5 model was to reduce fuel consumption by 20%, though we have managed to reduce it by up to 25% in ECO mode,” said Tsuyoshi Nakamura, manager at Hitachi’s Tsuchiura development centre in Japan.
“If they were parts of the human body the pumps would be the heart and the control valve would be the brain. Without the control valve there would be no advantage over the old system.”
Hitachi is introducing a host of Dash-5 Zaxis machines at bauma, from the 14tonne ZX140LC-5 to the giant 85tonne ZX870LCH-5. This larger quarry machine uses Hitachi’s HIOS IIIB hydraulic system. The machine benefits from a 6% rise in productivity in H/P mode compared to the previous model, while swing torque is up by 9%.
Stand: F5 515/516
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