Question about Craftsman Air Tools & Compressors

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I have an older Craftsman Air Compressor and the knob valve to reg the pressure seems to not be working. Can I replace it?

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It is getting increasingly more difficult to obtain replacement parts for older compressors. If your regulator failed at a fairly high pressure adjustment, say around 100-120 lbs, you could just leave the old regulator in place and add a regulator when needed to one of the quick connects. Purchase a generic pressure regulator from Lowes and add quick fittings to easily connect the regulator or remove when not needed. You could also just remove the old regulator and work-in a new generic regulator in its place. Generic regulators sell for $20 - $40. Good luck with your repair.

Posted on Aug 07, 2010

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1 Answer

Compressor runs and sounds ok, but it only manages to show 20 lbs. It will not build air pressure and continues to run.


check air tank drain valve located on bottom of tank, if it is not leaking try adjusting air pres regulator (large black knob close to air hose connection.) the knob when turned in will increase the tank air pressure, if knob wont turn check that lock ring on bottom of knob to make sure it is disengaged. also check for air leaks in all lines and connections

Apr 16, 2012 | Craftsman 1 hp Air Compressor, 4 gal. -...

1 Answer

No regulated pressure


Pressure regulator can fail giving little or no pressure at quick connect. There is a plunger inside of reg that can get stuck due to moisture/rust and /or threads of adjustment knob could strip. Back side of regulator (opposite the knob) find a hex nut. Remove nut (let out all the air from tank before removing nut) and pull plunger/spring away, clean , lube and reinstall for test. If still no joy, remove knob by moving stop pin up (tiny pin close to lip of knob and or spring clip) and turning counter clock wise. Remove the piston from cylinder of reg making note of how it was installed, lube and reinstall, make sure that the threads inside the knob are good. Replace knob and turn in to max pressure. If still no joy, replace reg or install temp air outlet. To install temp outlet, remove safety pop valve (remove all air from tank) and install tee fitting. Reinstall pop valve to one port of the tee fitting and quick connect to the other (or generic regulator ((sold at Lowes)) between quick connect). Good luck

Nov 11, 2011 | Porter Cable C2002 150 Psi 6 Gal...

2 Answers

My regulator adjustment knob is not working and there is no air pressure on the psi regulator gauge. Air goes into the tank and the hose from the motor to the tank gets extremely hot. Is this normal for...


The air discharge hose will normally get very hot. When the pressure regulator valve fails, it may no longer give you air. As a temp measure you can get air out of the unit by removing the safety pop valve and installing a tee fitting in the port. On one side of t fitting reinstall safety. On the second port install a quick connect for full tank pressure. Make sure that there is not air in the tank by pulling on the ring of the safety before you take it off. Replacement parts are at www.toolpartsdirect.com or dewalt service center. Good luck

Jul 12, 2011 | Porter Cable C2002 150 Psi 6 Gal...

1 Answer

I have a Craftsman compressor Model # 919-15292 2. The compressor stopped building pressure because air was continually being released through the unloader valve. I have replaced the unloader valve,...


you must have wired the new pressure switch incorrectly .when the pressure switch opens it will release the head pressure so your compressor must be running with the pressure switch contacts open should be 4 connections 2 marked motor which is from your compressor and 2 marked line which is your power coming in

Jun 15, 2011 | Craftsman 33 gal Air Compressor 6 hp...

1 Answer

I have an older 33 gallon horizontal craftsman compressor. In December I turned the compressor on in my unheated garage when the temp had been in the 20's for days. It seemed to run normally at first. Then...


It sounds like the pressure safety valve could be acting up. It is designed to open when the tank pressure it too high and they don't always reset until the pressure is down to nothing. Some models have them included on the gauge manifold and some on the top of the tank under the cover. It is also possible that the upper limit on the motor switch is set a little too high which would also cause the valve to "pop" before the compressor shuts off.

Mar 18, 2011 | Craftsman 33 gal Air Compressor 6 hp...

1 Answer

Compressor not building enough pressure.only 5lbs.


It seems that your cut off switch or your relief valve is not working. If the cut off switch stops the compressor at 5psi instead of 100/120, then the switch is defective. If the relief valve operates (loud whooshing sound and the compressor keeps running), then the relief valve needs replacing. Normally the relief valve wears out first as the seal gets worn or the spring fails.

Nov 28, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

2 Answers

Can not build working pressure pressure......


The most likely problem is a burned out "run capacitor" on the motor. If you continue to try to run your compressor in this condition it will burn out the "starting capacitor" and/or motor as well.
It's also possible that you have a bad start up pressure relief valve, this valve will be between the compressor and the tank. If this valve is working properly you should hear a hiss of air as the compressor motor shuts off.
A reasonable motor repair shop should be able to replace the run capacitor for $20-$50 plus inflation, depending on your area.
If you need to test the start up pressure relief valve, you need to take it loose at the compressor or tank. Just loosening the line may not work depending on the style used. Note: sometimes just taking this loose to test it causes you to have to replace the valve.

May 29, 2010 | Craftsman 1 Hp, 4 Gal. Air Compressor

1 Answer

WILL NOT BUILD PRESSURE


Many craftsman compressor are built by champbell hausfeld using a dry type of cylinder and piston (no oil, no crankcase). If dry type, check for worn cylinder and piston ring. Pieces of the vinyl ring can jamb between the reed valves in the head causing air to escape from the intake. If your compressor has a crankcase and oil, check for broken reed valves in head. Spray soap solution on hoses, checkvalve, drainvalve, and fittings to check for leaks. Most likely problem is reed valves broken or open. Parts are available from sears or match parts to chpower.com. enjoy

Nov 26, 2008 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

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