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Quote:
Originally Posted by Jerry Parr WI
I have a generator that recently started squealing after being oiled. Turned out to be the rear bushing in the generator. Not sure why oiling it made the squeal start. Only did it at idle and you can feel the armature vibrating in the bushing. Still works ok.
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Replace the bushing ASAP or you may have to replace some much more expensive parts. A worn bearing or bushing can allow the armature to rub on the pole shoes and that's what can kill the armature and/or field windings.