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Air Compressor motor help needed. Anyone speaks "electrical" ?

Discussion in 'The Repair Shop' started by angelo c, Oct 10, 2018.

  1. angelo c

    angelo c Larger Member

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    probably as much as a "saw guru" ?
    gazzillionaires eh !!!
     
  2. Fish

    Fish Super OPE Member

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    Yeah, and a bunch of lip/flack!!!!
     
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  3. angelo c

    angelo c Larger Member

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    any way...it's always good to hear from you John. thanks for the advise ...
     
  4. Fish

    Fish Super OPE Member

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    I looked into replacing a motor on my compressor long ago, and found that the H.P. numbers allowed to be advertised were totally bogus, and we are not allowed to know what that gibberish actually means, and any replacement motors were either so expensive, or chinese junk, that one could go to Lowes and buy a Campbell Hausfiel or similar new for less money.
     
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  5. Fish

    Fish Super OPE Member

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    Like I said, life is too short, unless you have a body shop.......
     
  6. Fish

    Fish Super OPE Member

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    Actually Lowes has some decent chit, you just have to look at what you are looking at.
     
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  7. Fish

    Fish Super OPE Member

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    I live in Ingersoll country, so I like that name.
     
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  8. paragonbuilder

    paragonbuilder Mastermind Approved!

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    This^^^^^
    Ratings are a bunch of crap, especially on China stuff.
    The motor shop you took it to didn’t have any info or a motor to replace it for you?
     
  9. Fresch

    Fresch Well-Known OPE Member

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  10. Fresch

    Fresch Well-Known OPE Member

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  11. angelo c

    angelo c Larger Member

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  12. Al Smith

    Al Smith Pinnacle OPE Member

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    What often happens is usually one or more of several things .The "unloader" stops working which causes the start winding to fail .The start switch fails causing the start winding to fail .The start cap fails causing the start winding failure .Once after all the smoke leaks out of the winding it will never run again . Get on Craiglist and find another motor .
     
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  13. JB-PlantHeirloom

    JB-PlantHeirloom OPE Member

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    I would buy a used compressor off CL and use that motor or the whole compressor. Personally if I was going to spend $400 for a motor, which I would not, I would upgrade to a two stage compressor.

    You can find fan motors for HVAC condenser units rated the same HP and RPMs as compressor motors and run $80-120 on Amazon. Hesitate before following the CHINenglish instructions that shows wiring the reverse wire to load, it lets the smoke out.

    If you have a pulley set up, old table saws (ones made out of all metal) usually have motors that can be used on compressors. The bonus is they have nice pulleys, I have gotten decent money for the ones I sold.

    If you go to freight auctions or industrial auctions, you can pick up single compressors or pallets of air compressors cheap.

    Storage auctions are iffy because the stuff left behind many times is the stuff that did not run that they could not sell on CL.

    If you want to try some local auctions:

    https://www.proxibid.com/

    You will likely find compressors in warehouse and automobile auctions, though I have found them in food service auctions too.
     
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  14. Bilge Rat

    Bilge Rat Super OPE Member

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    The frame size is about the intended use.
    Find the HP, RPM and voltage then the frame size.
    The frame size will give you the shaft dia. and the mounting hole pattern.

    Get a Grainger catalog, find the HP/rpm/voltage list then you will see the shaft size/ frame size.
    You will find that the frame size can be a few sizes. The difference is in the mounting of the motor.
    The plate on the compressor can hold a few different frame # or you can drill a few holes and mount the motor.

    A 3hp 215 frame motor is pretty common.

    Look at the mounting charts and you will find what you need.
     
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