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Unisaw wiring diagram dual voltage motor

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Forum topic by Fourthgencarp posted 02-17-2016 02:25 PM 1028 views 0 times favorited 14 replies Add to Favorites Watch
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Fourthgencarp

8 posts in 296 days


02-17-2016 02:25 PM

Topic tags/keywords: unisaw

I have a unisaw 34-761 with a dual voltage motor when I got the saw it was wired for 220 I’m trying to wire it for 110 and the Rockwell 83-621 motor has no wire diagram on it I have another unisaw 34-461 with a leeson dual voltage I went off the diagram on that motor and the motor won’t start it just hums. Does anyone have a diagram for that motor or a reason it won’t start?


14 replies so far

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Fourthgencarp

8 posts in 296 days


#1 posted 02-17-2016 02:50 PM

Also the motor was rewired at one time so it has 4 black wires numbered 1 2 3 4. And 2 red wires with no numbers

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MrUnix

4234 posts in 1665 days


#2 posted 02-17-2016 05:28 PM

According to Leeson, it’s either a model 120925 or 120997 (1.5HP). You can look up the wiring diagram at their web site by searching for the model number. Alternatively, you could probably send them an e-mail or give them a call and they would tell you what you need to do. Oh, as for not starting… if it’s wired correctly, I’d check the start capacitor – you can test it with a cheap multimeter in resistance mode.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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Fourthgencarp

8 posts in 296 days


#3 posted 02-17-2016 06:29 PM

The leeson is wired for 110. But I’m trying to wire the Rockwell motor for 110

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MrUnix

4234 posts in 1665 days


#4 posted 02-17-2016 06:32 PM


The leeson is wired for 110. But I m trying to wire the Rockwell motor for 110
- Fourthgencarp

You said it was a Rockwell 83-621 motor, right? Rockwell doesn’t make motors, and that motor model number comes back as being made by Leeson (See this page). What does the motor data plate say?

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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Fourthgencarp

8 posts in 296 days


#5 posted 02-17-2016 07:56 PM

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shastaman

30 posts in 315 days


#6 posted 02-17-2016 09:06 PM

From the above link…
(Lesson) 120997 replace Delta UNISAW® motor 83-621 (1.5HP

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runswithscissors

2192 posts in 1491 days


#7 posted 02-17-2016 10:22 PM

I see that motor pulls 19.2 amps at 110 volts. Wondering whether a 20 amp circuit will be marginal for that motor. Might be cheaper/easier to put in a 220 v. circuit.

-- I admit to being an adrenaline junky; fortunately, I'm very easily frightened

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Fourthgencarp

8 posts in 296 days


#8 posted 02-17-2016 11:22 PM

I’m converting the saw cause I just built a barn and there’s no service yet gotta wait till spring so it’s running off an extension cord

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runswithscissors

2192 posts in 1491 days


#9 posted 02-18-2016 03:00 AM

Okay, that raises another concern. You will get voltage drop with an extension cord, especially with a long one. I’d want no less than a 10 gauge extension cord for that use.

Maybe others who no more about this than I do can weigh in.

And, by the way, it’s also possible to use a 220 v. extension cord. I run a piece of outdoor equipment with a 3 hp Dayton motor with an extension cord about 25 feet long. Works fine, and I think it would be better for your motor to not starve it of voltage. I do make a point of not running it when everything is wet (I only use it outdoors, not under shelter).

-- I admit to being an adrenaline junky; fortunately, I'm very easily frightened

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Fourthgencarp

8 posts in 296 days


#10 posted 02-19-2016 08:08 PM

Either way I still need a wire diagram to wire it 220 or 110. If someone has one of these motors please snap a picture of the diagram

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MrUnix

4234 posts in 1665 days


#11 posted 02-20-2016 04:28 PM

Well, it’s not mine, but while scanning through the local CL ads I ran across this Unisaw with the same motor… and this picture was posted for it:

It’s not the best, but might give you a hint or two. You can probably load it into a graphics program and enhance the wiring diagram a bit… maybe.

Also, this data plate was found with a quick google search, which might be a bit better:

Cheers,
Brad

PS: Trying to run a 19.2FLA motor on 120v using an extension cord might not be the best idea in the world. I hope you have a sufficient dedicated circuit for it and a really large gauge extension cord!

-- Brad in FL - To be old and wise, you must first be young and stupid

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bigblockyeti

3668 posts in 1186 days


#12 posted 02-20-2016 06:14 PM

PS: Trying to run a 19.2FLA motor on 120v using an extension cord might not be the best idea in the world. I hope you have a sufficient dedicated circuit for it and a really large gauge extension cord!

- MrUnix

Dedicated circuit, heck I hope he has good insurance and a pretty dim adjuster.

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Fourthgencarp

8 posts in 296 days


#13 posted 02-27-2016 02:50 AM

Finally figured out the wiring got it at 110. Runs perfect on a 100’ foot cord doesn’t even dim the lights when I turn it on. The Rockwell motor starts smoother than leeson motor I was surprised

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MrUnix

4234 posts in 1665 days


#14 posted 02-27-2016 03:00 AM

You might consider posting how you wired it so anyone else in the same position can be helped in the future.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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