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Posted on May 13, 2009
Answered by a Fixya Expert

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Senco finish nailer not firing nails

Gun would not fire any nails after i purchased new ones (same as originals) from Home Depot. 15 g 2 in finish nails. Now firing pin is fully extended and wont retract.

  • Anonymous May 11, 2010

    Could be that there is a jammed nail behind the driver. Unplug the tool from air and remove all nails from magazine and see if you can push driver back up DONT HIT it with anything yet. Could also be a broken piston assembly. What is the model number and what kind of nails e.g guage did you get. Let me know and I will try and help

  • Anonymous Mar 12, 2014

    finish nail wont feed

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1 Answer

Joe Garcia

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  • Expert 210 Answers
  • Posted on May 29, 2009
Joe Garcia
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Joined: Feb 25, 2009
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Firing pin called the driver is probably broken or needs new seals max air pressure 125 psi senco sells repair kits

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Related Questions:

1helpful
1answer

My Senco finish nail gun only shoots a nail every OTHER pull of the trigger. It's a model SFN30 and does this about 65% of the time. It's clean and has really had very little use.

Your driver is not returning fully.
Most often this is caused by:
1) A bent driver blade - pull the driver out and inspect it, make sure it is straight.
2) A broken seal o-ring on the bottom end of the cylinder (#66)

Senco SFN30 15 Ga Finish Nailer Parts
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Gun fires mor than one nail at a time porter cable model da 250a 15 ga. finish nailer

There are two issues that people have with nailers that sound the same however are totally different. Firing more that one nail at a time can be taken as; two nails being driven with one fire or the nailer vary rapidly firing a second time almost instantly after firing the first nail and each time only drive one nail. Problem of double fire (either type) is very common with nailers (the gun very quickly fires twice), however two nails at once can only happen if the wrong gauge nails are used in the gun. A 15 g nailer can very easily pass two 18 g nails or, with more difficulty, pass two 16g nails. To help prevent the driver blade from hitting two nail heads at once, most drivers are slightly tapered at the tip so that the driver will hit the first nail and the tapered part will push the other nails back into the rails slightly. Remove the head of the nailer and pull out the driver. Measure or compare the thickness of the driver to the thickness of the nail head. If you are sure that you are using 15 gauge nails, check the driver for taper. The tapered part should face the rails. If not tapered, try carefully grinding a taper keeping the tip cool so that you do not effect the hardness. You could also check for other brands of 15 g nails with slightly more spacing between the nails. There is a big difference in quality among brands of nails. Good luck with your repair
0helpful
1answer

My Senco SFN1 finish nailer will not shoot a nail. When the trigger is pulled air comes out but no nail is shot. Thanks,Steve L

Not sure about Senco but most have latch you can open to expose firing mechanism. Nail sometimes gets jammed and will not allow driver to fire or if not nail push driver ****** all the way back into gun then see if gun will fire.
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GT90CH fires but no nail after twenty shots.

a bit of air tool oil might help, make sure you are not getting condensation in the line, otherwise you may have to dissassemble to clean
1helpful
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Skips a nail after each shot

When this has happened to me, I found that the feeder was sticking. This is usually due to a lack of lubrication. Try placing some pneumatic oil onto the feeder area and then trigger the gun a number of times to work it in. (I usually fire the gun without nails for this.) Then load up the nails and try again. Make sure that you add oil to the air stream on a regular basis to keep this from happening again.

Dan
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Senco 601 nailer shoots 2 nails each time the trigger is pulled.

the 601 had a design flaw, in the nose, where the nails hit as the are being pushed forward, the peice was made out of a peice of metal that was too soft, it wore down and that is where you get the double nail problem.

Senco offered a trade in, this was years ago, for a limited time and gave us credit towards new guns, which we gladly did
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Air bypassing when the trigger is pulled, nail gun will not fire

You will need to get a repair kit for that model and brand nailer. It has a leek in the diaphragm or a bad O-ring.
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