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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1 Answer

Air comes out the nose of my dewalt framing nailer


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

1 Answer

Inlet air preasure


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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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1 Answer

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best of look ian

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