Compressor motor getting hot and kicking breaker off?

by David Lee
(Lenoir, NC)

Campbell Hausfeld 80 gallon compressor (Photo: www.lowes.com)

Campbell Hausfeld 80 gallon compressor (Photo: www.lowes.com)

I have a Campbell Hausfeld 80 gallon air compressor and the motor went bad.


I replaced the motor with the same horsepower motor. About 8 months later the compressor went bad but instead of replacing it with the orginal 5hp compressor I replaced with the 7hp compressor.

Since that time in the summer went it is warm if it turns on more then twice in about 30 minutes then the motor will get hot and kick the breaker off.

Do I need to up size the electric motor to a 7.5hp or is there something else I can do?
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David, let me ask you something. If you can lift 100 lbs. comfortably and you are asked to do so, you do it, and don't strain any muscles in the process. If, on the other hand, you are requested to lift 120 lbs. you can still do it, but you are overloading your muscles, and you are going to suffer consequences like becoming over heated, straining, torn muscle tissue etc.

If I understand your post correctly, you now have a compressor that is built to be powered by a 7.5 HP electric motor, and you are trying to run that 7.5 HP requiring pump with a 5 HP motor. Is that correct?

Then you are trying to the lift 120 lbs. with the muscles that are built to handle 100 lbs. safely.

I expect you are destroying the motor, and it won't be long before you have to replace it. And when you do, yup, make sure the motor HP matches the demands of the pump, or you are buying into ongoing air compressor maintenance problems, as far as I see it.

Cheers,

Bill

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FP200300AV no air pressure

FP200300AV - Compressor motor runs but will not build up any pressure in the tank. No apparent leaks, so ????????
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So, the best thing to do is to go to the site map page, look under troubleshooting, follow the link to the page about air compressors that don't build air pressure, and check some of the things referred to there.

After you have done the checks, if you still have questions, do add a comment here.

Cheers,

Bill

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VT627505AJ making funny noise...now won't start at all?

by Brandon
(Emporia, KS, US)

I have a 3hp 60 gallon vertical Cambell Hausfeld air compressor. Model number VT627505AJ.
It was purchased March 2011 from TSC.

Last week when it came on it was making a strange noise. I quickly flipped the switch to shut it off. When I turned it back on, it would act as if it wanted to run, but the motor and pump would only start to turn, maybe 3/4 of a rotation, then stop. Again, I would shut it off.

I suspected run capacitor, but I went ahead and replaced both the start and run capacitor.

After I replaced these, the motor was doing the same, 3/4s of a turn and stopping. Then, after several attempts of switching it off and on, the motor started and began pumping. I shut it back off, and turned it back on several times, and it continued to start and run each time. It was building pressure, but it did not sound quite like it had before.

Then, after a few minutes of running, the motor slowed to a stop. I turned it off, and now, when I turn it back on, it doesn't come on at all.

TSC told me it's no longer covered by them, but that CH would cover it for 3 years. I have to call them on Monday.

But...
Any suggestions? I would be willing to try to fix it on my own, but I don't know what to try next.

Thanks for your help,
-Brandon
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Brandon, it would be a big help to have heard the noise, in particular, if it could be identified as coming from the motor or the pump.

TSC does not show the CH brand as available any more though I suspect that their Maxair brand may be a CH compressor too.

I can find no info on your VT627505AJ so I don't even know what voltage it is, or if it is a two-stage, twin cylinder compressor.

I suspect that you may have a drive issue between the motor and the pump. Make sure all mounts are secure and that the belt is adjusted properly.

If so, remove the belt and see if the motor runs freely. With the belt off, can you turn the pump sheave by hand?

Perhaps you might check these first and leave a comment here with what you found?

Thanks,

Bill



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campbell hausfeld air compressor builds pressure but blows breaker when trying to restart

will not restart after pressure is out of tank blows breaker
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Ensure that the compressor is plugged directly into a 20 amp breaker circuit with no other items pulling power from the same circuit.

If it is already, then, the next issue to check for me would be the start capacitor. See that page, check it, and add a comment here about what you found, if you would.

Bill

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