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Fire Pump Failure Avoided

Fire Pump Failure Avoided

On a routine condition monitoring survey at a Hunter Valley coal preparation plant, one of the site Fire Pumps was found to have significant bearing problems which would have resulted in catastrophic failure of the pump when called upon in an emergency situation. This...
Critical Fan Imbalance Repaired

Critical Fan Imbalance Repaired

Significant downtime on a critical mine ventilation fan was averted when increasing imbalance was tracked over 4 weeks and timely action was taken to repair the problem in a planned and controlled manner. Situation: During routine condition monitoring surveys on one...
Incorrect Fitting Caused Bearing Failure

Incorrect Fitting Caused Bearing Failure

Costly downtime from catastrophic failure was avoided when a conveyor drive pulley bearing mounting sleeve came loose and was found by NES on a routine condition monitoring survey. Situation: During a routine condition monitoring survey of the conveyor drive...
New Conveyor Pulley Bearing Fault

New Conveyor Pulley Bearing Fault

A newly installed head pulley on a mine conveyor caused a high temperature bearing alarm after less than 4 weeks operation and NES staff were requested to investigate using vibration analysis. Situation: The head pulley had been replaced and before the next routine...
Cracked Rivets Found With NDT

Cracked Rivets Found With NDT

Cracked rivets were found by NES NDT staff in the Dolly Car Winder intermediate shaft bearing support structure which was allowing excessive movement of the bearing during operation of the Winder. Situation: Routine condition monitoring surveys by NES staff found...