Question about Dewalt D51256K 16 gauge finish nailer kit

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Gun wont sink nail

Gone was droped long time ago started to leak a little air out of the exhaust but still worked fine now a year later the gun has started to not be able to sink the nail with the adjust all the way in

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Sounds like safety needs adjusted you have bent the arm and it is thinking that the guard is not fully depressed and thus it vents air . adjust it with wrench or straighten arm. I have had this happen before- but in my case the adjuster backed off- same result -look in manual for adjusting as well - should be there or take to service -easy fix and should be cheap

Posted on Oct 22, 2008


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Oct 14, 2012 | Porter Cable Coil Roofing Nailer

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I have the 2 1/2 Hitachi for nailing siding. The nail gun had not been used for a couple of years, but now will only drive the nail half way in. Sounds like an air leak when driving the nail. I have...

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1 Answer

There is a flow of air continually blowing from the gun at the nail loading location, causing it to fail to properly sink the nails into the wood

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1 Answer

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The nails are only coming half way out and sticking.

Hi again, Well we don't know what size or how you are using your compressor but if it receives a lot of use like in a big shop, investing in a dryer might not be a bad idea. The more you use one the more water as heat is generated by compressing the air and as in cools it condenses the water out. In the mean time most all compressor tanks have a valve at the bottom of the tank to drain the water out, open it slowly so that you get a good stream and when the water is gone it will start bleeding the air and you can close it. I think Idaho is right about the composition of the nails and sometimes the glue strip on the top that holds them all together can gum up the gun. Also between you and me I don't think there is such a thing as an oil less pneumatic tool. Put a couple of drops of pneumatic tool oil in the air inlet, if the gun doesn't need it, it will come out in the exhaust. but it will also force any moisture through the gun as well. Let me know how this works out for you and Thanks to Idaho as well.

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1 Answer

Gun failure


Have you been lubricating it regularly with nail gun oil. We use framing nailers every day at the commercial tree farm I work at and one of the operating instruction is to put 6 to 8 drops of oil in the air hose connection on the nailer before every use. I suspect the O ring on the piston is worn out/

Hope this helps Good luck Loringh PS Please leave a rating if appropriate Thks

Nov 15, 2008 | Dewalt D51256K 16 gauge finish nailer kit

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