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chvet73

01-10-2007 10:44:03




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Already been there too. Did not work




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Gerald J.

01-10-2007 11:14:12




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 Re: more in reply to chvet73, 01-10-2007 10:44:03  
There are only a few things that keep an AC motor from starting. Too much load, bad starting winding, bad start switch/relay, low voltage. The single phase motor won't start without the start winding which provides a bit of a rotating field. Once its running it runs fine on a single phase field so the start winding is disconnected.

So if it only hums, something is wrong in the start circuit, or the load is too stiff, or the voltage is low. There aren't any other possibilities. Well, could be bad bearings in the motor that let the armature drag on the stator which the magnetic fields make worse. Or a bent motor shaft causing the same.

Could be the replacement parts are not good.

Gerald J.

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