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Compressor wont stop running

When you first turn it on when it gets up to 120 psi it is suppose to quit running and shut off it don't I have to turn it off before it burns up the motor why is it not shutting down when it hits 120 psi I wonder if the check valve is bad please help my compressor is a Campbell hounsfied 7hp 60 gallon tank 230 volt motor. Ty

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  • Master
  • 7,482 Answers

Hi pickeringstr
Replace your shut-off switch...it is faulty
Bud

Posted on Apr 28, 2013

  • pickeringstr May 01, 2013

    Ty sir appreciate it

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SOURCE: 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 www.chpower.com I believe that the part number is wl210300aj. Not expensive, enjoy.

Posted on Dec 13, 2008

ollie reece
  • 1167 Answers

SOURCE: tank does not fill to proper psi

strip the cyclinder off and inspect the valves if closing and opening also check to make sure you dont have a blown head gasket also on the tank from the pipe from the pump unit is a gold valve you need to open the end off this valve with the tank drained and turn the ruber around with the spring inside and replace this if still doesnt work get back to me bud

Posted on Sep 11, 2009

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1 Answer

I have a C2001-WK that does not auto shut off


A regulator controls the pressure in the air line leaving the compressor and does not affect when the compressor turns on or off.

The pressure switch monitors the pressure in the tank and turns the compressor motor on and off when the switch closes or opens in response to changes in the tank pressure. If the compressor does not shut off, it is possible the pressure switch has been set to a pressure level that is higher than the compressor is capable of attaining, thus it does not shut off.

The compressor is capable of developing 150 psi and is noted as having a "120 psi cut-in pressure". When you say it doesn't shut off, does that mean it will generate 150 psi or more of pressure and fails to shut off or it develops less than 150 psi and does not shut off.

If the compressor does not generate 150 psi, then it is probably somewhat worn out and not capable of developing enough pressure to meet the factory high pressure limit. I would try adjusting the pressure switch upper pressure limit down to 130 psi or less (less if the compressor will not develop 130 psi) and see if this solves your problem If it doesn't,

If the compressor will develop 150 psi or more, then try adjusting the high pressure limit to less than 150 psi. If you can't adjust the high pressure limit then the pressure switch is defective and needs to be replaced.

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1 Answer

My kobalt air compressor model#215914 won't stop running is it suppose's do that?


All compressors run up to their rated high pressure level, usually listed on the data plate on the compressor or in the manual, then the pressure regulator turns them off. If your compressor is not shutting off it is either not getting to the pressure it takes to get the pressure regulator to turn it off or the pressure regulator is broke and won't turn the motor off. To check which, turn the compressor on and watch the guage that shows tank pressure. If the pressure rises then stops at a level below the rated pressure for your compressor and the motor continues to run, you have a leak somewhere. It could be the tank drain valve, the lines from the pump to the tank, the valve plate or in the piston cylinder area. If the pressure rises more than ten psi above the rating for your tank, your pressure regulator is broke or possibly set too high. If you know how, you can try lowering the shutoff point to see if that fixes it but you're usually better off replacing the regulator.

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I have a Husky air compressor model WL651004AJ. The problem is that it builds pressure initially up to 75 psi then shuts off. I have to turn off the power switch, wait about 5 minutes, turn the switch back...


It sounds like you need to replace the run capacitor , if yours is weak or defective the motor will overheat. Check "Drillspot" for a replacement. Another major cause of overheating is due to a dirty air filter , you should check it first.

Don F

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1 Answer

Which type of a compressor machine has a better to a plant consuming 500 CFM of air at an average of 120 psig screw type or piston type


A screw type compressor will be the better solution. Screw compressors are made to run. You can also get screw compressors with variable speed with means electrical savings. Ingersoll has screws that are up to 150 psi. Atlas Copco has screws that I know go up to 175 psi. I don't know if it's still available but the Government had assistance plans or grants if purchasing a compressor with a power savings feature.

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I have a D55168 Dewalt compressor. Since I've had it, it has never shut off automatically and I've always shut it off manually at 200 psi. If I leave it alone, will it automatically shut itself...


Your concern is very well placed, at pressures that high a lot of damage can be caused by a failure. According to the manual for this model air compressor the approximate cut-in pressure is 160 psi and the approximate cut-out pressure is 200 psi. Meaning it should pump up to 'about' 200 psi and shut off and not come on again until it gets down to 'about' 160 psi. They say approximate and I say about because it's not an exact science setting the pressure switch. Spring rates are not always exact, pressure guages are not that precise, etc. When turned on, it should shut off at 200 psi +/- 10 lbs. If it goes more than 10 lbs over that (220psi), I'd recommend you get the pressure switch and or guages checked or replaced.

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1 Answer

Can I limit the pressure to 120 PSI, the upper recommended limit for my nail gun?


adjust your pressure switch on your compressor .remove the cap and turn the screw clockwise to increase and counterclockwise decrease.turn the screw counterclockwise a bit and release some air till the compressor start pumping.then just before to reach 120 psi turn counterclockwise to stop the compressor at 120.then release some air again till it cuts in again and look at what pressure it will stop.keep going that way till you get your 120 psi.cut in should be around 90 psi(30 psi differential)depending what kind of pump you have (if the pump can handle 150 psi )you can adjust it to cut in at 120 and cut off at 150 and install a pressure regulator adjusted to 115 to 120 and get a nice steady pressure going to your nail gun.(the best way to do it!!!)

Jan 17, 2011 | Air Tools & Compressors

1 Answer

Dewalt air compressor keeps running until pressure output is 200 PSI, the same pressure in the tank. Why doesn't it quit running at 120 PSI the designated pressure on the compressor?


The regulator switch/unloader is bad or out of adjustment. Perhaps though the gauge is faulty. 200 psi in a 120psi compressor is dangerous, don't run it until it is fixed!

Dec 15, 2010 | Dewalt Air Tools & Compressors

1 Answer

Compressor shuts off at 60 psi will not come back on until opsi


If the pressure switch has been changed you will need to reset it if not ,then is the compressor trying to come back on but will not start untill it reaches 0 psi?

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My air compressor can pump air in but when it get


when it reaches 120 psi it will cut out usually will cut back in at around 70- 80 psi if it struggles to restart at cut in pressure it may not be bleeding the head pressure om your compressor . this is done by the pressure switch which when shuts off releases a small squirt of air under it . to solve this problem you may need new switch . there is also the non return valve to check

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1 Answer

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Check the operation of the relief valve. This is usually located near the regulator and gauge and has a small ring that you fit your finger in and pull outward. When you do so, compressed air should be released. If this is stuck or cant be released, there is your problem. It is quite dangerous to let the tank reach pressures beyond that allowed by the relief gauge. Usually 120-150 PSI.

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