Question about Dewalt Heavy Duty 2 Brad Nailer Compressor Combo Kit

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Dewalt compressor not filling with air

Constantly running

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  • David Ford
    David Ford May 11, 2010

    can you be more specific, is it not shutting off or are the petcocks open or do you have a major air leak?


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I have a Dewalt 2hp 4 gallon air compressor and it will not pressurize. When I turn it off I can hear and feel air coming out of a little needle valve where the line from the compressor goes into the tank. The pin is very small and down inside the hole - can barely see the tip.

Posted on Apr 25, 2009

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If you do not have any air leaks and it is a oil less compressor than it is most likely the piston seal is wore out. if it is an oil compressor that it is likely a flapper valve

Posted on Dec 21, 2008

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1 Answer

Dewalt compressor not filling with air constantly running

hi your problem seems to lie with the valves in the cylinder head not sealing i suggest you obtain a new valve set and replace said items
hope this helps

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