Evaporative Water Coolers - Motor shuts down after a couple of hours

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jimflint1
07-04-08, 05:24 AM
My swamp cooler motor shuts down after 2-4 hours. I just replaced the pulley on the motor, replaced the belt, and replaced the bearings on the non-pulley side. Prior to that the cooler had been making a terrible racket and I finally had determined that the pulley was the culprit (after I had replaced the bearings and belt :) ). So it sounds much better, but now shuts off, whereas it wasn't shutting off before. Any ideas?

WDIBAA
07-04-08, 06:27 AM
Temp overload sensor in the windings is opening, due to heating due to motor overload?
Intermittent winding open circuit, opens on temp or vibration?
jimflint1
07-04-08, 02:43 PM
Thanks. I think I solved it and the motor was burning out. I loosened the belt, and checked it again later and it hummed, but didn't spin.