Question about Dewalt Heavy - Duty 31° Clipped Head Framing Nailer - D51822

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My Dewalt doesn't work when I pull the trigger. I replaced the O-ring but it still doesn't work.

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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

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airnailer
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SOURCE: dewalt angled finish nailer, just got, when nose

if air is released when the trigger is pulled then stops when the trigger is released , then the trigger is doing its job. its probably a firing valve issue. four screws will take off the top cap of the gun the firing valve is inside of the cap . first check to see if the gun has enough oil( unless its an oil less gun) if its dry then grease or oil all of the orings, if this dose not work check to see if any of the orings or plastic parts need replacing. pls rate this answer...;tks

Posted on Feb 16, 2010

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SOURCE: DeWalt D51822 Framing Nailer: Replaced the trigger valve and air is still coming from the nose of the gun. I would think no air should get past the trigger valve until pressed. What's wrong?

Dewalt framing nailers use some vinyl orings (gold or clear in color) that fail too soon in both the trigger and the cylinder spacer. Air out the nose of gun indicates air is leaking past the cylinder spacer seals (If piston is pushed down with air leak then headvalve seal is leaking (remove nails for this test)). If piston is not pushed down with leak, remove head and pull out the cylinder with cylinder spacer (white plastic). Place the cylinder on workbench with bottom up. Push down on locking ring and remove retainer to release all the other parts. Take picture or take note of parts together and as you pull them off to aid in re-assembly. You will need to replace the two orings between the white cylinder spacer and the cylinder. Order oring kit from dewalt or just purchase one ( # 141 universal oring ) and one metric oring 74.4mm x 3.1mm from hydraulic parts store. If the piston was pushed down with air leak, replace headvalve orings in the head. Good luck with your repair

Posted on Jul 21, 2012

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1 Answer

DeWalt D51822 Framing Nailer: Replaced the trigger valve and air is still coming from the nose of the gun. I would think no air should get past the trigger valve until pressed. What's wrong?


Dewalt framing nailers use some vinyl orings (gold or clear in color) that fail too soon in both the trigger and the cylinder spacer. Air out the nose of gun indicates air is leaking past the cylinder spacer seals (If piston is pushed down with air leak then headvalve seal is leaking (remove nails for this test)). If piston is not pushed down with leak, remove head and pull out the cylinder with cylinder spacer (white plastic). Place the cylinder on workbench with bottom up. Push down on locking ring and remove retainer to release all the other parts. Take picture or take note of parts together and as you pull them off to aid in re-assembly. You will need to replace the two orings between the white cylinder spacer and the cylinder. Order oring kit from dewalt or just purchase one ( # 141 universal oring ) and one metric oring 74.4mm x 3.1mm from hydraulic parts store. If the piston was pushed down with air leak, replace headvalve orings in the head. Good luck with your repair

Jul 05, 2012 | Dewalt Heavy - Duty 31° Clipped Head...

1 Answer

My framing nail gun won't fire when trigger is squeezed air leaks out but won't fire


Time for oring kit # d518005 available at Dewalt service center or at www.toolpartsdirect.com.
May as well order the replacement trigger valve while there. These two items will renew your gun. Good luck

Sep 16, 2011 | Dewalt Round Head Framing Nailer D51845

1 Answer

All the sudden the nail gun stop working, pull the trigger air leaks out at trigger area


I had a similar problem with one of my nail guns. What I found was a small rubber o-ring in the trigger mechanism had split. Once I replaced this the problem was corrected and the unit functioned fine.

You could replace the whole trigger assembly for about $35. But if you remove the assemble and replace the split-ring this would only cost a couple of bucks at most.

Trigger assembly shown below. ereplacementparts.com is one possible source for the trigger assembly others can be found on the Internet.

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Aug 21, 2011 | Dewalt Heavy - Duty 31° Clipped Head...

1 Answer

How does the framing nailer work with a black button grey button


Dewalt has two triggers available for their framing nailer. The black trigger (390746-00) is a bump style trigger. While holding the trigger, you will be able to fire a nail by pressing nose against work. This trigger is preferred by most framers because it is much faster. Gray trigger will only allow one nail to be fired. Bumping will not work with the gray trigger. With trigger released, you must place the nose against work then pull trigger to fire. To fire next round, you must release trigger, pull gun off the work, again place nose against work then press trigger. Check dewalt web site for recall information. Some dewalt framers have been recalled for faulty trigger. Good luck with your projects.

Aug 11, 2011 | Dewalt Round Head Framing Nailer D51845

1 Answer

As soon as air hose is connected the firing rod extends, stayes extended, and air continues to come out the vent holes at the top of the gun. this problem started after i replaced all the o-rings and...


check for a stuck firing valve or pinched o ring in the cap area, usually this is caused by the trigger valve but look in the cap, Did you lube all the o rings before installing??

Sep 30, 2010 | Dewalt Round Head Framing Nailer D51845

2 Answers

I am having problem with my Dewalt D51823 Framing Nailer- air started leaking out of the nose always when is plug to the compressor. the gun is immaculate inside. quite annoying the compressor keep...


Either the plunger has not completely returned to the "pre-firing" position, or there is a defect in one of the o-ring seals. Make sure that the gun is sufficiently lubricated and if so, then next check the condition of the o-rings. An improper seal will cause this. It is also possible that the trigger assembly has a small crack/leak.

Dan

Jun 11, 2010 | Dewalt Heavy - Duty 31° Clipped Head...

1 Answer

My dewalt framing nail gun was hooked to the air compressor, but was not being used when it began leaking air which you could hear and got louder. It sounded like it was leaking around the trigger area....


There are O-ring seals around the trigger that are probably leaking. You can try to lubricate the gun by adding the pneumatic oil to the air supply. That may be enough to seal it back up. Otherwise the seals and/or the trigger assembly will need to be replaced.

Dan

Mar 29, 2010 | Dewalt Round Head Framing Nailer D51845

1 Answer

I need help replacing a bostitch framing air nailer trigger model 28ww it's leaking air and won't work.


follow closely, do you have a new trigger assembly because the problem is with one o ring commonly referred as the purple o ring in the kits? either way the procedure to remove the trigger is first knock out the roll pin for the trigger latch and then the 2 roll pins for the trigger assembly. next get a shop rag or equivelant and place under the now exposed trigger assembly and then while holding the collar on the air chuck plug into tool and hold rag tight and trigger will "pop" out pull the chuck away and remove the 2 pins to disassemble the assembly or install in reverse order lubricating the o rings first. Let me know if you have any questions or problems.

Nov 22, 2009 | Stanley Bostitch F28WWMCN 28° Industrial...

1 Answer

Dewalt 51844 round head nailer


Could be a couple things, the seal ring on top of the cylinder or a cut oring or just a faulty trigger valve assembly. I would take it back and have the repair shop correct the problem for you at NC. Let me know if still a problem and I will look at a schematic and give you part numbers.

Feb 17, 2009 | Dewalt Heavy - Duty 31° Clipped Head...

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