Don
Cave Dweller
He wants you too, Malachi.
Member since December 2009
Posts: 2,616
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Post by Don on Oct 24, 2011 17:06:49 GMT -5
The 1/3 hp motor on my old lortone arbor quit working on me yesterday. There I was grinding cabs when all of the sudden the power goes out the motor shuts down. Every time I plug the motor in now it trips the GFIC on the outlet immediately. Is there any hope for salvaging this or is the motor toast? The power cord is wire to a light switch box to turn it on/off. maybe the switch is bad? should I install a new power cable and see what happens?
Thanks
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Post by jakesrocks on Oct 24, 2011 17:15:32 GMT -5
Check all of your wire connections first, and maybe replace the switch. They're cheap. Also check the wire connections to the motor. It very well could be something as easy as a wire that has come loose or is shorting out against a piece of metal. Was the motor hot or smoking before it quit ? If the motor wasn't overheating or smoking, it's probably a wiring problem.
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Post by johnjsgems on Oct 24, 2011 17:42:14 GMT -5
I would check everything with an ohm meter but it sounds like you don't have one. Is the motor really old (no thermal overload)? Did you possibly get water in the motor? I would do as Don suggested and check connections at the motor and visually check the switch for obvious damage (smell it too). Check the cord plug too. Ground faults can go bad also (if exposed to water or dropped if they are cord mounted). Does the motor spin freely with belt off? Any bearing play (up/down movement of motor shaft)? Any burned smell from motor windings? If motor has vents look inside for oil/dirt build up and blow out with air.
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Don
Cave Dweller
He wants you too, Malachi.
Member since December 2009
Posts: 2,616
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Post by Don on Oct 24, 2011 18:09:06 GMT -5
It's an old motor, at least 70's vintage. There was no burning, smoke, sparks. Water is a possibility, as it's mounted on the back of the arbor and there was some water on the hood leaking from the plumbing. but everything was dry when I took a closer look. I'll look at the cord and switch.
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Don
Cave Dweller
He wants you too, Malachi.
Member since December 2009
Posts: 2,616
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Post by Don on Oct 24, 2011 18:09:48 GMT -5
I can manually spin the shaft on the motor, no problems.
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rockhound97058
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Post by rockhound97058 on Oct 24, 2011 19:44:12 GMT -5
Sounds like it has a short somewhere, or bad ground, which if you have an old motor, I would imagine it's a two wire plug and not grounded through the cord to begin with. Sounds to me the GFCI plug did the job it's intended for. Have you always used this machine with this outlet? Reason I ask is maybe you just started using a different plug and it has a low amp rating. Just an idea? Jason
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Don
Cave Dweller
He wants you too, Malachi.
Member since December 2009
Posts: 2,616
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Post by Don on Oct 24, 2011 22:45:33 GMT -5
I've been using this motor with the same outlet for a couple weeks, but no longer than that since I've moved recently. I tried different outlets with no luck.
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