Question about Craftsman 3 gal. Air Compressor, 1.5 hp, Horizontal k

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Craftsman compresser md 919155730

Tank pressure won!t go pass 20 pounds

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This sounds like a pressure switch failure. follow the power cord to where it enters the compressor and the switch should be there. you should be able to order a new one through sears service center. Good luck.

Posted on Jun 04, 2009

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Why can`t my compressor pump over ten pounds ?


You didn't state what model compressor you have so in gerneral: if you have no leaks, remove the air pump head to check the reed valves on the valve plate and the condition of the piston, piston ring(s) and cylinder. If the reed valves are broken or warped from heat they won't seal properly. If the piston ring(s) are broken or the cylinder is badly scored air will leak past the piston instead of compressing and going into the tank.

Oct 23, 2012 | Air Tools & Compressors

1 Answer

Craftsman model no. 921.153101 won't go past 20


check the pressure switch also is it before or after a regulator

Mar 22, 2012 | Craftsman Air Tools & Compressors

1 Answer

The compressor runs but the pressure will only build to approx twenty pounds and the compressor keeps running. I have used it many times before and had the discharge regulator set to approx 45 pounds, and...


You have either a broken reed valve on the valve plate or a broken piston ring and/or badly scored cylinder. To check: remove the head on the air pump, the valve plate is directly under the head. The reeds have to be in good condition, no breaks, cracks or bending, to work properly. If they are OK, check the cylinder, it should be very smooth. You will have to remove the piston to check the ring around it. They have a tendency to dry out and sometimes a small section will flip over backwards and will no longer seal the piston enough to compress the air. You'll have to contact Sears to see if parts are still available for this compressor.

Feb 11, 2011 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

I have a flotec shallow well pump i can not get it to pump the water it stays at 20 pounds did i hook it up wromg


check your pressure tank. It sounds like it is water logged. This means there is no air pressure in it. If you're cut in pressure is set at 30 pounds you must have 30 psi of air pressure in the pressure tank.

Oct 01, 2010 | Flotec 3.4 Hp Floodmate Submersible Sump...

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No more then 30 pounds of presure and wont shut off. Flotec water


If the pressure does not get pass 30 psi, then check for leaks along the pipelines and on the tank itself. An air leak on the top portion of the tank can cause the pressure not to trigger the pressure switch. Use soap bubbles to detect any air leak. Although a stuck pressure is not more likely the problem, check it also.

Aug 31, 2009 | Flotec 1/2 Hp Stainless Steel Waterfall...

1 Answer

Know tank pressure


"no matter how long the compressor runs" If it's not connected to any high volume consuming devices, and that no leak has been detected...then either an head valve (checkvalve) , severed motor shaft, nor the piston/diaphragm is defective. If it does stop after a few minutes the gauge is surely defective

Jun 04, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Keeps stalling out


It sounds like you will have to adjust the governor system to hold the throttle on the motor open more so it doesn't bog the motor down. There should be an adjustment screw at the carb to perform this.
Hope this helps

Apr 06, 2009 | Air Tools & Compressors

1 Answer

Leaks air at the pressure switch


start your compressor and let it buid up pressure to turn off. then unplug from power.lossen the fill tube that goes from the pump to the tank. when you loosen it. if it leaks air then your check valve is bad and will have to be replaced.

Dec 25, 2008 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

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