Enerpac Completes World's First and Largest Lifting Job For Maintenance

Enerpac Completes World's First and Largest Lifting Job For Maintenance

World's first and largest precision lifting tasks of land-based equipment has been successfully undertaken in Australia by Enerpac for its client G & S Engineering Services. The PLC controlled precision hydraulic system was used to lift the dragline for essential maintenance of the bearing surfaces on which the dragline swivels.
The cylinders, controlled in groups of four around the perimeter of the dragline’s base, lifted it 10 mm at a time for optimum precision and control. They raised it a total of 200 mm to allow machining between the upper and lower rails on which a bearing is placed. The system simulated actual loading on the dragline to maximise and accurately predict the life of this bearing. The whole operation involved Enerpac specialists from Australia, Singapore and Europe.
They were all witness to the world’s first lifting of a dragline using the synchronous hydraulic system.

Draglines are probably the largest land-based equipment moving across on the face of the earth, typically ranging in size from 2500 tonnes to 6500 tons.

Features of the Enerpac Synchronous Hydraulic Lifting system for this project include:
Stroke control between unevenly distributed load points

Automatic stop at pre-set stroke

Robust PLC control with user friendly touch screen

Stroke and load control in all hydraulic circuits

Real time display of relative stroke and load

Continuous data recording of time, relative stroke and load

Data recording, graphic presentation and print out capability

Progressive lift control i.e. ability to tilt an object

Centre of gravity calculation

700 bar operating pressure, allowing full cylinder capacities with standard Enerpac hydraulic components