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Old 08-20-2013, 10:09 PM   #1
Hoot
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Default Help identify electric motor on compressor

I would really appreciate some help identifying the electric motor on a used air compressor that I picked up off Craig's List. The main reason I bought it was for the Quincy 325-16 pump that was on it. But I cannot find a data plate on the motor and the seller couldn't tell me anything about it either. He did have it hooked up to a single phase, 30 amp service, without any issues. So I'm thinking it's a 3 or 5 hp motor. Any guesses from the experienced folks out there based on the pictures? I also think the air compressor was pieced together. The tank has a 1983 Melben data plate, and they are owned by Campbell Hausfeld, I believe. So I'm not sure this would have originially come with a Quincy pump...


I'm also considering doing a teardown on the head and cylinder to check things out. Some of the external stuff looks a little sketchy (looks like a gas pipe flex hose connecting the pump to the tank???). The pump has been disassembled previously but I'm not sure how good the work was.

Thanks,
Houston


Last edited by Hoot; 08-20-2013 at 10:11 PM.
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Old 08-20-2013, 10:13 PM   #2
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Default Re: Help identify electric motor on compressor

Nice compressor
For the motor I want to say Lesson, maybe baldor. Did you try pulling the terminal cover on the far side and see if there is a wiring diagram or any markings in there? It looks like it has been painted at the same time the entire compressor was.

More pics, definitely wouldn't hurt.
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Old 08-20-2013, 10:19 PM   #3
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Default Re: Help identify electric motor on compressor

X2 "try pulling the terminal cover on the far side"
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Old 08-21-2013, 04:41 AM   #4
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Default Re: Help identify electric motor on compressor

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X2 "try pulling the terminal cover on the far side"
Sounds like a good start - I'll do that tonight.
-Houston
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Old 08-21-2013, 09:12 PM   #5
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Default Re: Help identify electric motor on compressor

This compressor is definitely pieced together. It has a Melden tag on the tank but a Speedaire sticker (painted over) that was located just under the motor. There is also some areas of "Speedaire Greene" on the drive belt cover.

I did some more disassembly on the motor in an attempt to find out more about it. There was nothing under the terminal cover. There is a button on the side that I assume is a thermal reset. The entire motor was painted a mustard yellow at one time.



There were some partial numbers under the capacitor covers.


Can anyone tell me how bad this is?? The outer part of the pulley is cracked but the assembly seems very secure...

Last edited by Hoot; 08-21-2013 at 09:19 PM.
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Old 08-21-2013, 09:56 PM   #6
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Default Re: Help identify electric motor on compressor

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Originally Posted by Hoot View Post
This compressor is definitely pieced together. It has a Melden tag on the tank but a Speedaire sticker (painted over) that was located just under the motor. There is also some areas of "Speedaire Greene" on the drive belt cover.

I did some more disassembly on the motor in an attempt to find out more about it. There was nothing under the terminal cover. There is a button on the side that I assume is a thermal reset. The entire motor was painted a mustard yellow at one time.



There were some partial numbers under the capacitor covers.


Can anyone tell me how bad this is?? The outer part of the pulley is cracked but the assembly seems very secure...

First off its not a pulley it's a sheave and I wouldn't hesitate to run that on an air compressor. But probably not on a motor that would run for hours on end. Just keep an eye on it and make sure it's not coming loose
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Old 08-21-2013, 10:18 PM   #7
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Default Re: Help identify electric motor on compressor

The sheave isn't cracked. It's the taper lock bushing that's cracked. They do that sometimes.

It will probably run a LONG time like that, so long as you keep the taper bushing bolts tight. You can always buy a new bushing, they're not expensive.
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One stroke to produce power and three strokes to wear it out.
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Old 08-21-2013, 10:32 PM   #8
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Default Re: Help identify electric motor on compressor

I would inspect it a little bit via inspection plate before committing to tear down. Don't waste your time rebuilding a tool. Let it run and see.
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Old 08-21-2013, 10:34 PM   #9
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Quote:
Originally Posted by Trey T View Post
Don't waste your time rebuilding a tool. Let it run and see.
Blasphemy!

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Quote:
Originally Posted by Sir Stanley Hooker
One stroke to produce power and three strokes to wear it out.
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Old 08-22-2013, 05:25 AM   #10
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Default Re: Help identify electric motor on compressor

Quote:
Originally Posted by A_Pmech View Post
The sheave isn't cracked. It's the taper lock bushing that's cracked. They do that sometimes.

It will probably run a LONG time like that, so long as you keep the taper bushing bolts tight. You can always buy a new bushing, they're not expensive.
I'll admit to knowing nothing about this pulley setup. I assume the tapered lock bushing and the pulley are pulled together by the bolts, and that locks them onto the motor output shaft? And where would you typically find a replacement? I looked on Grainger's website for tapered lock bushings, but didn't see anything that looked similar to what I have.
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Old 08-22-2013, 02:13 PM   #11
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Default Re: Help identify electric motor on compressor

Hoot,

My mistake. It's not a Gates Taper Lock, it's a Gates QD bushing. I get the two confused sometimes.

Mcmaster stocks them:

http://www.mcmaster.com/#quick-disco...shings/=o6fh3b

They are easy to destroy if you don't follow the dismounting instructions here:

http://www.gates.com/downloads/Vol%2...ion%5B1%5D.pdf
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Quote:
Originally Posted by Sir Stanley Hooker
One stroke to produce power and three strokes to wear it out.
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Old 08-22-2013, 04:07 PM   #12
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Default Re: Help identify electric motor on compressor

Much appreciated. Although it would probably be fine as is, it would bother me to no end if I didn't try to fix it. And I had no idea what I was even looking at when I pulled the guard off and found the crack. I always thought pulleys were just bolted on... Again, thanks for the info. Especially the instructions...

-Houston
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Old 08-22-2013, 05:10 PM   #13
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Default Re: Help identify electric motor on compressor

We call these woods taper locks. If you send me the numbers that are stamped into the bushing,I'll see if I have one. I could send it to you for the cost of shipping it.Just PM me with those numbers. They will have the shaft size,the bushing number,and possibly the key size. To remove the bushing,use the threaded holes to push the bushing out of the pulley.


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