from reliance.com
Posted 3/29/2004
Problem D – Motor bearings run hot or noisy
| D1: Check loading. Is excessive side pressure, end loading or vibration overloading bearings? |  |
Reduce overloading.* Install larger motor. |
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| D2: Is sleeve bearing motor mounted on a slant causing end thrust? | |
Mount horizontally* or install ball bearing motor. |
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| D3: Is bent or misaligned shaft overloading bearings? | |
Replace bent shaft or align shaft.* |
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| D4: Is loose or damaged end bell overloading shaft? | |
Tighten or replace end bell.* |
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| D5: Are bearings dry? | |
Lubricate.* |
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| D6: Is bearing lubricant dirty, contaminated or of wrong grade? | |
Clean bearings and lubricate with proper grade* |
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| D7: Remove end bells. Are bearings misaligned, worn or damaged? | |
Replace. |
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*Bearings may have been damaged. If motor still runs noisy or hot, replace bearings. |
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