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They have no cooling, so it isn't too surprising that they would run rather cozy. However, most are not burning up. The more common problem is for the internal ground wire for the field coil to lose contact with ground. Fix the ground problem inside of the motor by adding another nut (as I...

Hi BC, The universal motors in these blowers have simple oilite (sintered bronze) sleeve bearings. The only thing they have to keep the armature centered is a couple of plastic washers that take up most of the space. They rely on the magnetic attraction of the armature to the field to keep...

You're welcome! This fix-it obsession of mine is just part of what happens to you when you were taught how to live by a father that grew up on a farm in Wisconsin during the Great Depression. I sometimes wish I could just toss and replace, but I can't do that without feeling very guilty. -Chuck

You went a little further than was necessary, but it doesn't look like you broke anything too serious. The only trick in putting it back together from there is holding the brushes in their sleeves so that you can get the commutator to go past them. I used a piece of thin wire that straightened...

Perhaps... But I can fillet and fix a heater motor in well under an hour. Parts cost is zero. How long does it take to find, order and ship a new motor from some supplier? If the new motor is made by the same vendor as the old one, it too will soon fail. -Chuck

It isn't the brushes, it probably isn't the speed resistor, it is a poorly designed motor. The terminal lug, for the field wire that returns to ground, is attached to the middle of one of the bolts that holds on the motor's end bells. There is a nut on that bolt that squeezes the lug against a...