Question about Craftsman Air Tools & Compressors

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The knob for the air pressure regulator is broken. what should I do?

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You can get a new knob sears it vary good about parts lists as long as the steam for the regulator it good. Or you could ever retrofix with something that fits and you can turn the valve with as long as it works it dosen't matter what the knob looks like.

Posted on Dec 28, 2010

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Posted on Jan 02, 2017

  • 54 Answers

SOURCE: Pressure regulator control knob leeks air and will

I assume turning up the pressure doesn't help. The regulator probably has a torn diaphragm. It will need replaced (i doubt you can get a rebuild kit).

Posted on Oct 23, 2009

  • 1383 Answers

SOURCE: Makita MAC5200 Compressor. Leaks

There are two types of regulators used. One has a rubber diaphram sealed at perimeter with body and a piston type. Most likely you have the piston type. Remove body containing piston/ spring mech. Examine piston lip seal. Lip will face toward body of reg. and must fit snugly into cylinder. Make sure cylinder is smooth and is well lubed.
If seal/piston fits loose remove seal and wrap some teflon tape in groove and re-install lip seal /test for snug fit. Notice small metal actuator extending from center of reg. , if it is circular (about 1/8 dia) then there should be an oring of the same size mated/fit into the piston. If this oring is missing it will leak as you describe. Lastly, there should be a gasket or oring sealing outer shell to body. If you have diaphragm type look for holes, tear or shrink too small. Parts are at www.toolpartsdirect.com or Lowes in the plumbing department good place for orings and silicone lube. Good luck

Posted on Sep 28, 2010

  • 205 Answers

SOURCE: I have a Porter Cable

Replace the regulator

Posted on Nov 15, 2010

  • 2422 Answers

SOURCE: Craftsman Air Compressor 919.156640 -- Today, when

You could give it a try you don't have anything to loose and you might be able to clean it and thats what it sounds like. But you can redo bolth of the regulators with new ones get rid of the plastic cover and they thread on a pipe that comes out of the air system. You could get two new gauges and a manifold body for 50 dollars at a place that sells auto paint supplys or spray equipment. If the compresser still works good its worth it you just have to do a little retro fitting these parts tend to be vary standard its your call good luck

Posted on Jan 02, 2011

Testimonial: "Thanks. If I can't get it to work by my attempt at cleaning, I'll certainly follow your advice."

  • 1 Answer

SOURCE: Bostitch 6 gal compressor regulator knob is broken

Here is the story. You do not need a receipt but tell them it is the older compressor. They are obligated by law to replace the part since it has been deemed defective unless they want a class action lawsuit in which case they would have to pay triple damages.

Posted on Jan 27, 2011

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1 Answer

Have tank pressure but no regulated pressure


This usually happens when the pressure spring in the regulator breaks, sometimes from overtightening the regulator knob. The way it works is that the amount of pressure you put on the regulator spring (by twisting the knob) will be equal to the pressure on the downstream side of the regulator. When the spring breaks, the pressure on the spring is zero and so is your downstream air pressure. You need to replace the regulator.

Jun 07, 2011 | Porter Cable Air Tools & Compressors

1 Answer

Regulator will not hold indicated air pressure output. reducing regulator pressure to zero then reset results in little difference, output appears to be on low end.


Pressure regulator can be dis-assembled and lubricated or replaced. If lip seal and pressure pin are dry, the regulator will not function correctly. I do not think that there is a repair kit but try lubing with silicone paste sold at Lowes in the plumbing department. Lowes also stocks campbell hausfeld regulators and water seperators. An upgraded regulator will provide more cfm and a greater accuracy in pressure control. To repair regulator, empty tank of air and turn regulator counter clockwise to release pressure on spring and take apart. If you do not see any way to dis-assemble, then there is a tiny pin on the lower edge of knob that must be removed before knob will thread off completely. Push pin up from under knob. Good luck

Nov 13, 2010 | Campbell Hausfeld 8GAL Air Compressor

1 Answer

My gas powered compressure runs good as far as it has 125psi in the tanks but no air comes out of mthe air hose


The regulator pressure spring may be broken. Does the regulator knob turn freely both ways, but the gage stays at zero? If so, you need to replace the regulator.

Aug 03, 2010 | Ridgid 17038 4.5 Gallon Oil Free Twinstack...

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Hi. Pressure does not build up in outlet pressure gauge. It reads "zero" while the tank pressure gauge reads 150psi. Obviously there is no pressure being delivered to the nail gun. I've tried turning the...


try taking the gauge off, do that arfter you drain it from the safty valve, and then run it and see if eny air comes out, if not thers a block, unless your regulator as jamed up inside, try taking the knob right off and push it down with a screw driver or something alike, air should come out ether into your airline or on the way out of taking the device out of the hole should drop psi in the airline through a little hole on the regulator. if none of this happens then i dunno, if it does be careful not to strip the knob putting it back on.

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2 Answers

Worked fine previously. Now when turned on the tank pressure comes up normally . However, the regulated pressure gauge reads zero and there is no airflow.


What happens when you twist the regulated pressure knob, as you would to increase the regulated pressure? Does the knob turn? Does it turn until it stops, but still reads zero? If so, it sounds like the regulator pressure spring is broken. That's inside the regulator, and you will probably have to replace the regulator.

Jun 16, 2010 | Porter Cable C2002 150 Psi 6 Gal...

3 Answers

Outlet pressure?


have you tried turning the pressure adjustment knob clockwise to increase regulated, not tank, pressure

Dec 12, 2009 | Campbell Hausfeld No.FP2028 Gal Pancake...

3 Answers

The air tanks fill with air, but the pressure


The regulator sounds like it is cranked closed. Try slowly operating the adjusting knob in the opposite direction. As the valve moves, you should see the pressure rise on your gauge (it probably does work).
Hope this helps....now go make something!
Best regards, --W/D--

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1 Answer

Air compressor pressure not regulating


Usually you cannot adjust the cut out pressure of the tank/motor itself, this is why they have regulators, which regulates the pressure flowing down the air lines (regulators like these dont regulate actual tank pressure cutout). To regulate air flow using the regulator knob, you actually have to have air flowing through the hose while you make the regulator/pressure adjustments as regulators regulate pressure DOWNSTREAM from the actual regulator itself.. so air flowing through is a must. Attach an air blower or something similar and let air start flowing through the hose. Now turn your regulator knob in the "-" direction to decrease regulated pressure. It is best to bring pressure all the way down to "0" first, then open the regulator up (by turning to the "+" side) and pressure will rise until you get to the desired pressure needed for the air tool in use. The tank pressure will still be between 80-125 PSI as the motor regulates and keeps the pressure in the tank between these values automatically, but your line/hose air flow pressure will remain at the regulated pressure (say 40 PSI or whatever you set using the regulator knob).

Hope that helps and makes sense.

Please rate this solution on FixYa!

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1 Answer

How do you utilize the air pressure control knob.


Most air pressure regulator knobs work like a "child-proof" cap on a medicine vial.  It has a spring inside that keeps it dis-engaged from the tooth like gears inside.  To turn the knob you must first pull out or push in the knob.  You should feel some resistance from the spring inside.  As you pull, you will feel the knob seat into the "teeth" inside.  Then you can turn the knob and change the air pressure supplied.   Note:  most air regulator valves work in the opposite manner of regular water valves.  Turning the knob clockwise should increase the air pressure... counter clockwise should decrease the pressure.       I hope this solution will bring you success.   Best Regards,  Michael Mittelsdorf

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