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HEAVY METAL

PLANT

Hydraulic lifting specialist Enerpac has claimed one of the world's heaviest precision lifts during maintenance of a 3,5000 tonne dragline at the Curragh coal mine in Australia.The firm's synchronous hydraulic system was used to lift the dragline to within a tolerance of 0.5 mm, using 80 hydraulic cylinders, each with a capacity of 100 tonnes.

Enerpac experts from Europe, Asia and Australia oversaw the simultaneous lifting 10 mm at a time to a height of 200 mm, to allow the replacement of bearings. By controlling the cylinders in groups of four, the huge machine could be tilted without losing stability, the firm said.