Troubleshoot AC Motors – Part 4

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This is a 4 part series, click to view each part: 1 : 2 : 3 : 4

D1: Check loading. Is excessive side pressure, end loading or vibration overloading bearings?		Reduce overloading.* Install larger motor.

D2: Is sleeve bearing motor mounted on a slant causing end thrust?		Mount horizontally* or install ball bearing motor.

D3: Is bent or misaligned shaft overloading bearings?		Replace bent shaft or align shaft.*

D4: Is loose or damaged end bell overloading shaft?		Tighten or replace end bell.*

D5: Are bearings dry?		Lubricate.*

D6: Is bearing lubricant dirty, contaminated or of wrong grade?		Clean bearings and lubricate with proper grade*

D7: Remove end bells. Are bearings misaligned, worn or damaged?		Replace.
*Bearings may have been damaged. If motor still runs noisy or hot, replace bearings.

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