Electric Power & Utilities/Dayton LR22132 motor

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Question
I have a table saw with a Dayton LR22132 motor on it.  It is a dual voltage motor.  It was rewired from 220 to 110 by the previous owner.  When I plugged it in and flipped the switch, there was a loud humming and the blade rotated a few degrees backward.  Is that diagnostic of a particular problem?  d

Answer
That would seem that the starting winding is not engaging. First check that it is wired properly for low voltage. If possible, look through the vents at the rear of the motor, to see if there are any burned or black windings. Make sure the power is off. Blow out the motor with compressed air, while slowing turning the motor over a few times by hand.  Then check the capacitor to see if the wires are connected. WARNING!! Capacitors can and will hold a charge for a extended period of time! Bleed off the capacitor using a insulated screwdriver placed across the two posts. If the capacitor shows signs of leaking or bulging, it will need to be replaced. Also, it can look perfect, and still be defective.

For further testing, it will require a analog multimeter. A digital meter will not work as good, as most will want to read resistance and not continuity. Let me know if you have one, or can get one and I will guide you through some more tests, before you have to remove the motor.  

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Charles C. Jones

Expertise

Let Me help you with your problems with single phase and three phase electric motors. I can tell you how to troubleshoot your motor problems. From simple testing of capacitors, how to test your windings, replacing bearings, and general maintenance. Before we go any further, remember these words of advice: Disconnect the power before you do anything! Please limit your questions to electric motors and there immediate components. I review each question, and if I can answer or help, then I will. If you receive a rejection, it means it is out of my expertise, and just do not have the answer. I'll be waiting for your question.

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I have 40 years experience in the repair of electric motors and related equipment. I am a master machinist in the field of motor repair. I was employed with my company for 35 years, but retired in May of 2013. The downside to that is I lost access to a lot of technical data. I will still try to give you the most accurate advice that I can.

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Former member EASA

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