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General Humidifiermodel #40

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Why won't my air compressor run my nail gun?

I have a craftsman air compressor model no 919_165220. It shows 125lbs on pressure gauge and 100lbs on regulator

Posted January 11, 2012


James, January 11, 2012

I'm sorry to hear that you are having some difficulties with your Craftsman Compressor. I did some research for you at Managemylife and found an expert answer to a similar question that may help until your expert can respond to your specific question. The link is attached below.

Jimmy K , January 13, 2012

If the compressor is going from an empty tank to 125 lbs pressure in around 15 minutes it is working normally.

I can not find the scfm rating for your air compressor. It should be on the compressor or some information you received when you bought the compressor. The scfm required for the nail gun should be on the nail gun. If the scfm of the compressor is not as much or more than the scfm required for the nail gun, the compressor won't run the nail gun. Nail guns require a fairly large scfm and all compressors won't run them.

billy, January 14, 2012

I let all the air out of the tank and started over the compressor took only 8mins. to reach 130lds. and shut offthe pressure regulato showed 120psi so I ajusted it down to 110psi and tried the nail gun again and it still doesn't even push the nails all the way up to the nose of the gun.The air compressor lable shows to carry 8.6scfm at 40 psi and 6.4scfm at 90psi and the nailer calls for 70-110psi max.the air consumption is 4-6scfm so it's within the called for range that it should work but still won't shot anything but air.I have tried setting the thumb wheel to shot nail at both the max.and the min.

Jimmy K , January 16, 2012

Billy, I apologize for assuming you meant the compressor would not maintain pressure when you were using the nail gun. Thanks for sending the additional information. It sounds like the compressor is working good. I suspect the problem is in your nail gun. It sounds like the seals inside the nail gun are leaking the pressure around the ram. Try some other air tools and see if the compressor works them. You can probably see a parts diagram for your nail gun (if that is the problem) at Sears Service. If you have more questions, reply and I will be glad to help.


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