THE sheave assembly on a BN1370 dragline has come crashing to the ground at a Queensland open cut coal mine after a major structural failure of the boom point sheaves.
A structural defect of the boom point sheave swivel yoke was not identified during routine maintenance.
A coal mine worker operating the dragline was in the process of slewing with a full bucket in preparation to dump onto spoil. The worker heard a loud noise and shortly afterwards the bucket fell to...
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