Unloader Valve bleeds air all the time?

by Dennis
(Lake Lure, NC)

I have a Campbell Hausfeld 13 gallon air compressor, model #WL604004AJ.


The unloader valve (part #CW00800AV) dumps air 90% of the time.

I installed an auto drain system that tied into the line from the unloader valve, but the autodrain failed so i removed it and replaced the line from the unloader valve to the tank. I've removed this valve and examined it, but it appears to be intact. Do you have any recommendations as to why this valve dumps the air most of the time, causing the air compressor to cycle exessively?

Thank you for your time and help.
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Yup, I do, Dennis.

Wander over to the CHECK VALVE page, read about what it is and what it does, and I believe that you'll see what the problem most likely is.

Did that resolve it? A comment here with an update would be nice.

Cheers,

Bill

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Sep 06, 2011
Reply to Bill
by: Dennis

Bill, thanks for sending me to the check valve page - this sounds like my problem.

Thanks and have a great day!


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Maybe let us know if this solves the problem? And you are sure welcome.

B.

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Air compressor sometimes kicks out overload

by bill smith
(redlands,ca)

old sears air compressor 120 volt 4 gallon 3 hp starts ok and pumps up to 150 psi and when air goes down to 120 psi air compressor tries to start but kicks the overload protector. if I bleed air down to 50 or lower it will start back up. will like to know if anyone can help






Bill says...

Hello Bill. It's hard to be sure, but from the sounds of it, I think your unloader valve may not be working every time the compressor reaches cut out pressure level.

When the compressor stops, are you hearing it dump the air over the piston? You know, it sort of goes "pssshtttt" for a second or so?

If you are not hearing that, then it is likely the unloader not working, and making your motor work too hard to try and start against the trapped air pressure.

Here is information on unloader valves.

Cheers,

Bill

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