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Isolating Rotary Dairy Machinery (SA060) Number 3 2004

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					Safety Alert
                                                                               Number 3 2004

                          Isolating Rotary Dairy Machinery




           Details
           A dairy worker was attempting to get a fully-loaded rotary milking platform moving. It had
           stopped revolving because of a problem with the drive mechanism.
           The worker, believing the drive mechanism was electrically isolated, began to make repairs.
           However, the platform unexpectedly began moving — which resulted in the machinery
           amputating one of the worker’s fingers.

           Contributing Factors
           An investigation into this accident revealed that:
           • the worker had pulled the platform perimeter lanyard and opened the cow safety gate. He
             knew the lanyard had a reset function and assumed it would isolate the drive mechanism
           • however, the cow safety gate did not have this feature. Therefore, when the worker pulled
             the platform perimeter lanyard and opened the cow safety gate, only the circuit on the cow
             safety gate was opened. The lanyard did not open the drive circuit
           • cows can become restless when confined in a rotary stall if there is no movement. In this
             particular incident, a restless cow actually moved the gate.This closed the circuit and restarted
             the drive mechanism.
           see over...

HOBART 30 Gordons Hill Rd PO Box 56 Rosny Park 7018
LAUNCESTON Henty House, 1 Civic Square Launceston 7250                             www.workplacesafe.tas.gov.au   1300 366 322
BURNIE Reece House, 46 Mount St PO Box 287 Burnie Tasmania 7320
Recommendations
• Power must be correctly isolated before gaining access to any machinery.
• Full isolation must be achieved by opening all circuits, which must be locked off and tagged
  out.
• All workers must be trained in the isolation procedures, and fully understand them.


      If you would like further information contact Workplace Standards Tasmania on:
     Telephone: 1300 366 322 (inside Tasmania) or (03) 6233 7657 (outside Tasmania)
Fax: (03) 6233 8338 Email: wstinfo@dier.tas.gov.au     Internet: www.workplacesafe.tas.gov.au




                                                               ..........................................................


                                                               Don Schofield
                                                               Chief Inspector of Industry
                                                               Workplace Standards Tasmania
                                                               October 2004

				
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Description: Isolating Rotary Dairy Machinery (SA060) Number 3 2004