Question about Campbell Hausfeld 26 - Gallon Air Compressor

1 Answer

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.

Posted by on

  • 3 more comments 
  • 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.



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 140 Answers

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

  • 2 more comments 
  • 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.

    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.

    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..



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How many liters of compredssor oil to fill tha compressor tank

I don't know which model of air compressor you own, some models require no oil whatsoever. The important thing to remember is that you should never put oil inside the tank. While it probably won't damage the compressor and may, in fact, be good for air tools, oil does not belong in the tank. The tank itself should contain clean, dry, air ONLY. Depending on the job you're performing, oil and water in the air tank will ruin your hard work, especially if you are spray painting. The air compressor motor does require oil (unless, again, it's oilless), just fill it through the oil filler hole until it barely starts to leak out. You can change the oil every year if you use your air compressor professionally. Most people who use their compressor only occasionally never change their oil or even check the level. My compressor is a 20 year old Campbell Hausfield with the original oil. I don't recommend that, just stating the facts...I do religiously drain the water out of the tank with the drain valve, and I have replaced the drive belt. Once.

Feb 25, 2015 | Air Tools & Compressors

1 Answer

What type of oil is needed in my Durabuilt air compressor-6 gallon tank? I need to replace some oil. Thanx. Send response to "" Thanx.

Howdy. It's actually called Compressor Oil and is available at nearly all hardware stores and tool rental agencies. There are several brands and they are all comparable. I use Senco, but Campbell Hausfield is also good. Farmerbear at

Oct 23, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Need to know what oil to use in cap 2560 compressor

You can use any brand of compressor oil from the hardware store, it is all nearly the same. If you can find it, the Senco oil is very good quality, also the Campbell Hausfield oil is fine and less expensive. Only point is make sure you get the compressor oil and not the tool oil as it is not the same.
Rock on,
Farmerbear at

Sep 15, 2010 | Stanley Bostitch HP118K 23 Gauge Headless...

1 Answer

Campbell Hausfield Air compressor Mod. HL421500, One year old. My compressor is running but will only put out 10 Psi.

The valves are bad. Replace them with a valve plate kit from

Sep 14, 2010 | Garden

1 Answer

Compressor problems when filling tank

There should be a device called an "unloader " connected to the machines own switch. This releases the pressure from the compressor so it can start up without the resistance of the pressure in the tank.There should be a hissing noise when the machine stops, the sound of the air on the compressor side of a non return valve being released.

Jun 03, 2010 | Campbell Hausfeld 13 HP 30Gallon Air...

2 Answers

Where do you check or put the oil in the compressor?

If it is a oil type compressor, not all are, there will be a fill plug in the base of the compressor. Normally, compressors dont use much if any oil. I have one nearly 20 years old, I have not added a drop.

Yours may be oil-less. It should say on the compressor whether it is or not.

You dont mention the model, so I cannot say with authority if it is oil or oil-less.

Thanks for your interest in

Please vote



Dec 11, 2009 | Campbell Hausfeld 20 - Gallon Air...

2 Answers

I need to get an operators manual on campbell hausfeld air compressor model WL651500AJ


Oct 15, 2009 | Campbell Hausfeld 26 - Gallon Air...

1 Answer

No air pressure past 60PSI on a 125PSI Campbell Hausfield WL61110

Your comperssor is oilless type and suffers from short cylinder / piston life. When the compressor no longer reaches cycle pressure the cylinder / piston should be replaced. These parts are available at I believe that the part number is wl210300aj. Not expensive, enjoy.

Dec 13, 2008 | Campbell Hausfeld 26 - Gallon Air...

Not finding what you are looking for?
Campbell Hausfeld 26 - Gallon  Air Compressor Logo

999 people viewed this question

Ask a Question

Usually answered in minutes!

Top Campbell Hausfeld Air Tools & Compressors Experts

John Trevino

Level 3 Expert

1388 Answers

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Campbell Hausfeld Air Tool and Compressor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides