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73<br />

Planned Maintenance Corner<br />

Each issue of the MJ will have a sample Condition Monitoring routine. This issue’s sample is provided from IDCON’s 3 volume series of books<br />

on “Condition Monitoring Standards”. This excellence series contains a useful range of Condition Monitoring / Planned Maintenance routines<br />

and is available from:<br />

IDCON:<br />

info@idcon.com www.idcon.com<br />

or for the Asia Pacific region:<br />

mail@maintenancejournal.com www.maintenancejournal.com<br />

Condition Monitoring Standard - Screw Conveyor<br />

KEY WHAT WHY<br />

Some screw conveyors will have a hanger bearing in the middle. These provide support<br />

for screw conveyors that are comprised of two joined screws. Check that lubricating<br />

water for hanger bearing is working.<br />

Check for cracks in support<br />

Check bearings for noise and vibration (feel, listen). Use the infrared gun to check the<br />

bearing temperature. Inspect bearing hold down bolts and cap bolts (if applicable) for<br />

looseness and corrosion. Check condition of bearing seals, See CMS for bearings for<br />

more detail.<br />

Check hold<br />

down bolts<br />

(Both sides)<br />

Check for Loose or missing bolts<br />

Check cap<br />

bolts<br />

Without lubricating water, the<br />

hanger bearing will quickly wear,<br />

allowing the screw to rub on the<br />

bottom of the conveyor trough.<br />

Noise and vibration can be<br />

caused by loose mounting bolts<br />

or worn/damaged bearings.

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