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Thread: Air leak - framing nailer

  1. #1
    Join Date
    May 2004
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    columbia, sc
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    601

    Air leak - framing nailer

    I have a Dewalt framing nailer ó believe it or not sometimes I even use it for cabinetry. Havenít used it in a while but pulled it out yesterday and itís leaking air like a sieve right at the top where the nails exit. Any ideas?
    Bob C

  2. #2
    Join Date
    Feb 2014
    Location
    Lake Gaston, Henrico, NC
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    4,954
    Firing seal. I've never been in a Dewalt, but you can probably find a youtube video for the repair. Usually, firing valves/seals can be found on ebay, with free shipping.

  3. #3
    Join Date
    Sep 2016
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    Modesto, CA, USA
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    4,493
    Not clear, is it leaking at the bottom where nails shoot out or the top of the cylinder where the exhaust comes out.
    Bil lD.

  4. #4
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    May 2004
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    columbia, sc
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    Iíd need to check to verify but I believe itís leaking very close to where the nails come out.

  5. #5
    Join Date
    Jan 2013
    Location
    Williamstown,ma
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    994
    Give it about a teaspoon of air tool oil in the inlet fitting, hook up air, cycle about a dozen times- sometimes it goes away- the oil helps keep the seal sealed. If that don't work, time for a teardown.

  6. #6
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    May 2004
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    columbia, sc
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    Will do. Thanks guys

  7. #7
    Join Date
    Feb 2014
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    Lake Gaston, Henrico, NC
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    The other high-probability cause could be a piece of trash, or insect. I keep little covers on all of my air tool inlets after getting a dirt dauber in one of them. It's little effort to pull the top off the gun to see if there is anything obvious. I have some guns 46 years old, and have never had an o-ring go bad, but have had a number of firing seals split.

  8. #8
    Join Date
    May 2004
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    columbia, sc
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    601
    Will do. Thanks

  9. #9
    Quote Originally Posted by peter gagliardi View Post
    Give it about a teaspoon of air tool oil in the inlet fitting, hook up air, cycle about a dozen times- sometimes it goes away- the oil helps keep the seal sealed. If that don't work, time for a teardown.
    This! And if this doesn't work you'll need a seal kit, but this works almost always. I put my guns away with oil in them and a cycle or two. A stitch in time...

  10. #10
    Clearly, the only answer to your problem is to pick up a shiny, new rechargeable framing nailer.

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