Question about Campbell Hausfeld 26 - Gallon Air Compressor

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Air Compressor won't go over 35PSI

I have a 4 year old Campbell Hausfield 26Gallon 175PSI oil-less air compressor. The model is WL651500AJ. About 2 years ago, the pressure stopped going higher than 35PSI no matter how long the motor runs on it. I know this pressure being displayed is fairly accurate because my SUV tire pressure is 35PSI and I can get my tires up to this PSI but it takes forever to do it. Prior to the problem I'm having, I could get the pressure up in less than a minute.

The pressure doesn't seem to be leaking out of the tank as I can leave it alone for a couple days and the pressure still shows 35PSI and I've verified this pressure. I have also cleaned the air filter and retaped all of the fittings. All pressure relief valves are shut obviously. I'm out of ideas, any help would be appreciated.

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  • Tom Sutch Jan 22, 2009

    How sure are you that this is the problem? Is there anything else that it can be? Can I take it apart and be able to obviously see the problem? I'd hate to spend $40 for the new piston and that not be the problem. I found a local place and they charge $83/hour + parts, by that time I'd have almost put into it what I originally paid for it.

  • Tom Sutch Jan 22, 2009

    Thanks for your quick responses. If I take it apart, will I be able to tell for sure if this is my problem by looking at it? Do you know how difficult this is to do?

  • Tom Sutch Jan 23, 2009

    I know what part I need, can you just point me in the direction of some sites that sell the parts. I've found a few through google but if you know of any others that would be greatly appreciated. I'm going to take it apart and try to repair myself.

  • Tom Sutch Jan 26, 2009

    I took everything apart this weekend and I think the problem is instead the Exhaust tube which is a piece of copper pipe that carries the air from the piston to the tank. It looks like it cracked right in the middle about a 2 inch long seam. I'm going to try and replace that along with new compression fittings and see what happens. I'll try and remember to post my results.

  • Tom Sutch Apr 13, 2009

    My problem was indeed the Exhaust tube which is about a 8 inch piece of bent copper that the air flows through into the tank. Thanks for everyones help.

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Hello, Your air compressor is leaking in the cylinder and is unable to produce more than the 35psi. Unfortunately oilless air compressors do not last very long. The rings and cylinders wear out. I have successfully repaired some units but, I usually recommend buying the oil type compressor. They last forever. If you want to try and repair it let me know and I'll help you. Good luck.

Posted on Jan 22, 2009

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  • David Robinson Jan 22, 2009

    Sorry to disappoint you but, I'm pretty sure that's your problem. These compressors aren't made very well and even if you fix it, it may only last a year. There are a lot of good deals on compressors from various sources and I could steer you in their direction or help you find parts for your unit. Let me know.

  • David Robinson Jan 23, 2009

    Unfortunately it's not always obvious if the piston is leaking. the ring is a fibrous round piece that is curved upwards and is a tight fit in the cylinder. If the valve plate is broken then that will be obvious.

    It is very easy to rebuild these type of compressors. Once you get the black cowling off you'll see how simple they are. You just have to make sure that you put it back in the exact order that it comes apart.

    Follow this link and it will take you to the parts manual.



    http://www.cpocampbellhausfeld.com/stati...

    Any more questions feel free to ask.

  • David Robinson Jan 23, 2009

    I would buy from the factory web site. It's at this link.

    http://www.chpower.com/webapp/wcs/stores...

    Good luck and if you need any help let me know. Also please rate me so I know if I'm helping.

  • cboss85769 Dec 20, 2011

    I have no idea if dmr0dmr is still going to see this message but I'm finding a similar issue at 50 psi with one I just purchased second hand. I got such a good price on it I cannot complain though and am totally commited to just doing the repair. Please contact me with any help you can give on how to perform this repair.. cboss85@gmail.com

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