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

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Nail gun leaking air through the nose.

Dewalt Heavy - Duty 31° Clipped Head when hooked up to hose, it constantly leaks air through the nose just where the head starts. firing pin?. had a new ring kit put in but still not fixed. help

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  • Krueg28 Apr 06, 2009

    I am having the same problem - air started leaking out of the nose. Then as I was about ready to quit - I fired a nail into a 2x10 and the gun went crazy - Machine gun - even after I took it away from the wood and let the trigger go - Kept firing very rapidly and emptied the clip..... - I took it apart and all the seals and cylinder look good. - Could this be the trigger valve?

    Robert

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Lets assume you have oiled the gun. Before you run out and buy an o-ring kit for this, take the gun apart and look for anything that may be jammed inside the gun. This could be dirt, grit or an unfired nail. The gun is very simple inside so don't be afraid to do this yourself. Undo the 4 hex screws holding on the cap at the back of the gun. Put the nose of the gun in a vise or get a friend to hold the gun for you. Grab hold of the cylinder inside the gun and pull it out. Wiggle it around and pull at the same time, it will be tight but it will come out. Totally disassemble the cylinder. If the seals look good take a very close look at the "Bulkhead". It is made of plastic and is prone to get very small hairline cracks in it and this will leak air. Look inside the cylinder and make sure the walls are smooth and not scored. This is all very easy to do. Don't just buy an o-ring kit assuming it will fix the problem. Look for the simple stuff first, it may save you some time and money. AGAIN IF THE O-RINGS LOOK GOOD TAKE A VERY CLOSE LOOK AT THE BULKHEAD AND LOOK FOR CRACKS, IF AIR IS LEAKING FROM THE NOSE THIS SHOULD BE THE FIRST PLACE TO LOOK AND COSTS ABOUT $7.00 TO REPLACE..........

Posted on Jan 15, 2010

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Double check the pison o-ring and check to make sure the blade is properly seated in the pison. also, check the sleeve for gouges.

the piston drive assembly should be assembled with loctite 271

Posted on Nov 16, 2008

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Air comes out the nose of my dewalt framing nailer
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Oct 09, 2012 | Dewalt Heavy - Duty 31° Clipped Head...

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

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Inlet air preasure
Dewalt guns use between 70 and 120 psi. I use 100 psi on all framing guns when testing, however the nailer will last longer if you use lower pressure (only whats needed to drive nail into work, depending on type of wood) . When too much pressure is used, extra force is absorbed by the lower bumper and nose area of gun.
The address below is dewalt service and has all the info about your nailer. Just enter the model number and look for pdf file. Check your model number for safety recall. Good luck
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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...
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Jun 11, 2010 | Dewalt Heavy - Duty 31° Clipped Head...

1 Answer

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Dec 09, 2009 | Dewalt Heavy - Duty 31° Clipped Head...

1 Answer

I've got the: Dewalt Heavy - Duty 31° Clipped Head Framing Nailer - D51822 As soon as I hook up the hose to it there is a leak some where. It's faint but makes my compressor kick on immediately. I...
Don't know if this will help you but here goes. I have a Bostich nailer and had to replace the check valve under the trigger.(at least it acts like a check valve, stops air loss when disconnecting gun from hose) It was leaking badly and had to remove trigger to replace the kit. You can do it yourself like I did or take it in to a shop. I carefully punched out the roll pins, replaced the kit after greasing the o-rings with lubricant that was supplied with kit and replaced the trigger.
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Dec 09, 2009 | Dewalt Heavy - Duty 31° Clipped Head...

1 Answer

Nail broken off in the gun can not unjam, what is the procedure to remove broken nail?
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