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Excavator upper lift in Goldfields

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Hercules Cranes based at Leonora in WA recently lifted the 200t upper of a Liebherr 996 hydraulic excavator using two 80t Demag all-terrain cranes and a hired Manitowoc 4100 crawler crane.

The upper was lifted 4m off the ground while a dozer pushed the tracks into position.

In another recent job Hercules used its three all terrain cranes as well as a hired crane to lift the upper (around 115t) of a Hitachi EX3500 mining shovel, which had to be placed so that the slew ring was not damaged.

According to operations manager Greg Roberts, lift planning was critical for positioning the cranes, picking up the upper and slewing to place it on the slew ring. Disassembly and reassembly took only 30 hours. The four cranes were required only for lifting the upper, with the bulk of the work done by the two Demags.

In all such lifts the cranes operate at a close radius at close to their rated capacity, after taking account of the 30% derating required for a multiple crane lift.

The Hercules fleet consists of one 70t Krupp and the two Demag all terrain cranes, a 45t Kato truck crane and an 18t and 20t Franna.

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