Just hums when plugged in

by Mike Kertis
(Allen, TX)

10 gallon model HL421000. My son's. Takes oil, noticed it was very low so I added some CH oil to the resevoir. All it will do when plugged in is hum. Has the motor been fried?

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Possibly, Mike.

If there is air in the tank, open the tank drain and bleed the air to zero PSI, and close the tank drain.

Try to start the compressor with no air in the tank. Did it? Answer as a comment here, please.

Bill

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campell hausfled iron horse series 5 hp. 20 gal.

by doug
(el paso ark usa)

I don't were the pressure switch is. This machine was really working well, but now it won't shut off . it will go to 200 psi I have to turn it off. Is there a adujustment to turn it down, the gauge adjustment does not help.
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Hello Doug...

My feeling is that your compressor pressure switch is pooched, and I strongly recommend that you do not use the air compressor again until the problem is rectified.

Without your compressor model number I was unable to find a picture of your air compressor to help you identify your pressure switch.

Go to the pressure switch pages on this site for guidance, or contact www.chpower.com for information about your compressor.

Cheers,

Bill

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CH 7.0 HP model DP400000AV compressor not building up pressure

by Wes
(Alabama)

Have a CH 7.0 HP, 60 gallon Compressor model DP400000AV. I am only building up about 40 psi, running continuously and it smells as if is was getting hot.

I realized that the first two air breathers were sucking and the third is blowing high volume air.

I would like to attempt this repair on my own, just never messed with small engines.

On another note, the site glass blew out several years ago when I was deployed. When I returned, I noticed oil all over my garage wall. After investigating, I found the lense blown out and I replaced it. No other problems until now, but I am suspecting possible damage now due to running without oil while I was gone. Of course, wife never noticed the oil all over the wall and never turned it off. Please point me in the right direction.
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Wes, from the symptoms you have described, I would guess that you've got a bad intake valve.

That it runs continuously means that it is likely exceeding its Duty Cycle, and that's likely why the motor is overheating.

See the troubleshooting section on the sitemap page for links to more pages about why air compressors run but do not build pressure.

Cheers,

Bill

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Campbell Hausfeld Compressor will not build pressure past 60 psi.

I have a Campbell Hausfeld air compressor model WL660101.

I have replaced the Pump/motor assembly, Pressure switch and Regulator.

But the compressor still will not build more than 60psi.

Here is a link to the part manual for this model. I am not sure what else there is to replace.

Thanks
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Now, that is a puzzler.

Under troubleshooting on the sitemap page is a link to a page to reasons why an air compressor will run and not build pressure.

What I'm reading is that, essentially, you have a new air compressor with the new pump and motor, regulator and pressure switch.

So, the typical reasons shouldn't apply, as you have replaced anything that might be the cause of the problem with new parts.

If the parts are not new, however, then you may still have a fault that produces this symptom... a compressor that runs and runs and won't build past a certain pressure level.

Please have a look at the page about this problem and try to determine from the info there what may be the compressor issue at fault.

Bill


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