Rotating equipment, either in storage, or down for long periods of time, should be rotated on a regular basis.

This prevents two things:

  • rust forming in the bearings, gears, etc., due to lubricant settling into the reservoir.
  • false brinelling, which is micro-spalling of the bearing raceways due to impacting. This occurs when vibration is present from nearby machines, forklift traffic, check valves slamming, or anything else that might cause vibration on a non-running machine. This vibration can damage even new bearings and seals.

Machinery operating on a common platform or header should be rotated on a weekly or monthly basis. If this cannot be done, pumps should be rotated by hand, a few revolutions.

Spares stored either in a equipment room, or in a supply room should be:

  • Properly lubricated for storage
  • Rotated by hand, a few revolutions, on a weekly or monthly basis
  • Equipment should be stored on racks or a wooden pallet (or even better, on neoprene isolator pads ) to minimize the effects of vibration from nearby operating equipment), and not on a concrete floor.

Machinery in long term storage outside should be covered overhead. But NOT wrapped in a tarp or shrink-wrap, due to condensation. In addition, the oil in these machines should be sampled annually, to make sure you don’t have water in bearings and gearboxes.

Back when I was collecting vibration data, I would just go around in pump rooms, and rotate the spares by hand while I was there. In some buildings we had a quarterly PM to go to our supply rooms, and rotate equipment.

Is it a little more trouble? Yes. But not as much as having a back-up pump that can’t run!

Share Blog Post

Subscribe to the
Acoem USA Blog

  • This field is for validation purposes and should be left unchanged.