Question about Dewalt D51822 Clipped Head 2Inch to 312Inch Framing Nailer

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It will not fire the nails. Unit is cleared with no obstructions. This has happened several times but now it will not work

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  • Dewalt Master
  • 1,383 Answers

If your gun is over a year old, you may have failing orings. Dewalt used vinyl orings (yellow to gold in color instead of black rubber) in the gun that fail. The vinyl orings are installed around the cylinder and inside the trigger valve. The gun may not leak air, however will not fire. The repair kit has all necessary orings, however may not include the trigger valve. Good luck

Posted on Nov 08, 2012

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Posted on Jan 02, 2017

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SOURCE: DeWalt d51822 framing nailer, shoots 2 nails at once 1 in 5 times

I worked at at tool rental center while attending college and learned from the old tool masters about nails and nailers. Rental stores have many different brands of nailers to rent and customers would bring their own nails of all brands. You will notice on the case/box that your nails will /should work on many other brands however the degree or angle of the nails is not always exacly as stated on the box. You should check with protractor the exact angle of your nails and also check the exact angle of the nailer. Use straight edge on travel path of the piston and another on guide rails to check angle of the gun. You will discover that all is not as stated as in a perfect world. If the angle is off slightly, the head of the second nail will get into the path of the driver. This happens mostly with clip head because the nail heads are so close together. The full round head is spaced further apart with less jamming. If angle is off slightly, take a look at other brands of nails with protractor in hand, the angle will be different slightly or choose a slightly thicker nail. Look for the nails to fit with bottom of nail hitting the barrel first. This will move the head of the nail slightly away from the center line. Finally do not release pusher with force as this will jamb nails closer together. Good Luck!?

Posted on Jun 18, 2009

  • 1383 Answers

SOURCE: after shooting a nail, it fires out two more

Dewalt has a new trigger valve to replace the original (part number 5140095-73). Not sure if the new valve is replacement to address an issue or natural progression. I would also replace the orings that make contact with the reference #55 on parts list called the bulkhead. There are four orings contacting the bulkhead that wear and may contribute to multi-fire. Parts are at dewalt service center or at www.toolpartsdirect.com Good luck

Posted on Aug 02, 2011

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1 Answer

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ok, so your nails are correct size gauge, and the right length too?? sometimes when shooting at 120psi into pine the nail is blown through the material. test it on something first something thinner that you can see if its working at all, or put in like 5 nails and see after you shoot if you still have 5 nails in the magazine.
if so make sure, nothing is obstructing the magazine chute to the driver, also make sure the nails are in the correct slot for them to be struck. keep me posted.

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Again sounds like blown O ring give it a squirt of 3in1 oil and fire it several times (if oil is compatible in your gun). Repair center if that doesn't work. Trash can also get in the air orifice and stop moving parts from moving.

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My framing nailer shoots out 2 nails at a time


Assuming that you are using the correct nails. This will usually happen if you have bump-fire trigger and are trying to place the gun on the work then pull trigger. Replace the safety spring if weak and bump-fire only (spring should be very firm). If you have single fire trigger, replace the trigger and the trigger valve for good operation. If you have always been bump-firing and now double firing, replace the safety spring and trigger orings. Good luck

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1 Answer

Nailer will get two nails jammfrontiered at same time about every 3rd nail


Nail jamming is caused when the driver is able to hit two nails with one stroke. This usually happens on nailers that use nail strips with no spacing between nails. If the driver is damaged, it may be able to hit part of the second nail. If the wrong nail is used and two nail heads are in the path of the driver then jam. On nailers using nailstrip with space between nails, it is much harder for driver to hit two nails. Most jamming, however is caused by the nailer actually firing twice in very rapid succession. this type of jam is caused by faulty firing mech. (safety foot or bump fire system) , faulty/worn trigger valve or worn orings in the headvalve .

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1 Answer

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

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2 Answers

My Brad sudddenly stopped working. Makes a Psft


If you've not already tried applying air motor oil to the gun than you should do this first. If this does not solve your problem than it's very possible that your main diaphram is worn or poruse. Thank you, Dana

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