NDK
Cave Dweller
Member since January 2009
Posts: 9,440
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Post by NDK on Mar 4, 2012 21:22:12 GMT -5
I have a 1/3 hp motor I was going to hook up to my trim saw. I wanted to reverse the direction so I removed the cover over the wiring. It says to reverse the red and black wires, but there was only a black wire hooked up besides the power cord wires. There is a red wire inside more, so I pulled on it a little to see if it was just stuffed in there. When I pulled on it I noticed the insulation was a little dry and falling apart. I decided I want to open the motor up and replace that wire, and any others that may be bad. I broke the tip of my allen wrench off in the set screw on the pulley, so I have to drill that out tomorrow. My main question is this: is there any reason why there's no red wire? I tried the other 3 terminals with just the black wire. 2 just made it hum, and one of them made the motor run in the same direction it was running to begin with. Here's the motor info Here's the wiring - Red should be on #2 (which now that I look at it is not there) Thanks in advance for your help! Nate
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Post by johnjsgems on Mar 4, 2012 22:21:23 GMT -5
There won't be any other red wires. It should be on two (or 5 depending on rotation).
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NDK
Cave Dweller
Member since January 2009
Posts: 9,440
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Post by NDK on Mar 4, 2012 23:19:33 GMT -5
So the red wire you can see in the bottom picture is what should be switched with the black? Do they wire them differently sometimes so this is more difficult? The motor came off an old furnace blower (squirrel cage), and I would imagine they wouldn't want the direction reversed.
Thanks John, Nate
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dellis326
off to a rocking start
Member since January 2012
Posts: 10
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Post by dellis326 on Mar 5, 2012 10:28:16 GMT -5
Try hooking your hot to #4 and your neutral to #1. Take note of which direction the motor turns. Then switch your hot to #1 and your neutral to #4 and see if it turns the other direction. the wiring inside the casing shouldn't be messed with unless there's a short. On the backside of that board with the connectors on it it'll be wired up so you only need to change the connections on the outside.
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Post by catmandewe on Mar 5, 2012 12:42:36 GMT -5
Any chance the #2 prong got pushed through the board and is somewhere underneath the board? Maybe someone pushed it through trying to hook it up and just hooked the 2 together and stuffed it under the board.
Tony
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Post by johnjsgems on Mar 5, 2012 12:46:42 GMT -5
Switching leads to 1 and 4 won't change directions on a single phase motor. I would carefully try to pull the red wire out and see if it is connected to anything inside. Looks like terminal two is missing. Someone may have wired it to back side of board. If the insulation is crumbling the motor may have other issues as well.
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NDK
Cave Dweller
Member since January 2009
Posts: 9,440
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Post by NDK on Mar 5, 2012 13:16:25 GMT -5
Any chance the #2 prong got pushed through the board and is somewhere underneath the board? Maybe someone pushed it through trying to hook it up and just hooked the 2 together and stuffed it under the board. Tony I was wondering that myself Tony. I'll pull it apart and see what's going on inside. The motor ran good and was quiet when running, so I'm hoping the wires are just getting dried out from age. Nate
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Mar 5, 2012 14:42:20 GMT -5
Instead of replacing the wires it may be easier to get some liquid plastic like the stuff you dip tool handles in and try to recoat the wires. A little smeared around should not hurt anything. Just make sure that it does not melt at low temp. Jim
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NDK
Cave Dweller
Member since January 2009
Posts: 9,440
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Post by NDK on Mar 5, 2012 16:31:42 GMT -5
Good idea Jim. I pulled the motor apart, and just wrapped some electrical tape around the wires where they were cracked. For the limited amount of use this will get, I figured that was good enough. Also, I can not reverse the direction on this motor. The red wire runs to the winding. I'm guessing it is specially wired not to reverse because it was on a furnace fan. BUT... It doesn't matter, because I realize now after putting it all together, I set the trim saw up to run the wrong direction. I need the pulley on the left because the arbor is right hand threaded. Lots of extra work, but it all worked out in the end! Thanks for all the help everyone. Nate
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
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Post by quartz on Mar 5, 2012 22:21:18 GMT -5
There is a product out there called "Liquid Black Tape", available at auto parts stores. I've used it on a variety of projects, including insulating wires in motors, works well.
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Post by FrogAndBearCreations on Mar 6, 2012 16:15:13 GMT -5
Home Depot carries that stuff in colors now too!
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sdgoldpanner
starting to spend too much on rocks
Member since January 2006
Posts: 226
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Post by sdgoldpanner on Mar 6, 2012 17:09:35 GMT -5
I have a 1/3 hp motor I was going to hook up to my trim saw. I wanted to reverse the direction so I removed the cover over the wiring. It says to reverse the red and black wires, but there was only a black wire hooked up besides the power cord wires. There is a red wire inside more, so I pulled on it a little to see if it was just stuffed in there. When I pulled on it I noticed the insulation was a little dry and falling apart. I decided I want to open the motor up and replace that wire, and any others that may be bad. I broke the tip of my allen wrench off in the set screw on the pulley, so I have to drill that out tomorrow. My main question is this: is there any reason why there's no red wire? I tried the other 3 terminals with just the black wire. 2 just made it hum, and one of them made the motor run in the same direction it was running to begin with. Here's the motor info Here's the wiring - Red should be on #2 (which now that I look at it is not there) Thanks in advance for your help! Nate If the insulation is that dry that it falls apart, you might have have other wires inside that are just as bad. Might be worth your time to use another motor. Just my 2cents worth.
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