Question about Nailers 3 12" Pneumatic Air Round Head Framing Nailer Nail Gun

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Power Base pb-04275 framing gun: the rod that drives the nail when the trigger is pulled remains in the fired [forward] position and hence cannot load another nail. Unable to find a fault in the mechanism and suspect the trigger system is not directing air to the correct port to drive the firing rod rearwards. When trigger is pulled the rod leaves a small depression in the wood, but no nail. Advice would be appreciated. Thank you. Graham

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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rowdy45176
  • 2176 Answers

SOURCE: Air leaks arond trigger when depressed, but no nail fires.

Where does the air leak out from? If it leaks from the trigger DeWalt makes a trigger valve assembly part # 641006-00 list 8.89 BUT if it leaks from other areas we have to look into it deeper. If it is just the trigger valve let me know and I will give you instructions how to remove and install the new one.

Posted on Feb 06, 2009

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rowdy45176
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SOURCE: Dewalt 51488. Air leaks around trigger and won't fire nail.

Go to Dewaltservicenet.com and download a breakdown of the tool before starting. I would recoment changing all the O rings and make sure that you get a good grease to lube them first. Its not that hard.

Posted on Jul 17, 2009

  • 63 Answers

SOURCE: My nail gun was fired

nail jam remove air, open front of nailer, make sure the shaft goes back up in..also check for incorrect size or type nails

Posted on Oct 22, 2010

  • 885 Answers

SOURCE: my ridgid r213bna nail gun won't fire a nail, but has good pressure & no jam...

If a gun is firing and nails are not being driven into the work it's because of one of two problems. The nails aren't feeding fully under the driver or the driver isn't fully retracting each time the gun is activated. Is looks like you've eliminated a feed problem so you are going to have to take the gun apart to find out why air is not being held in the bottom of the head long enough to push the driver back up the cylinder. Go to www.ereplacementparts.com and bring up your model so you can follow along. Remove the four screws holding the head cap on. The things that can cause your problem are: the piston seal & o-rnig are damaged, the cylinder is badly scored, the o-ring & cylinder ring on the bottom half ot the cylinder are damaged or out of place, or the driver guide under the bumper is broke or missing. If it turns out internal parts are damaged or missing, I highly recommend the overhaul kit to replace all the 'soft' parts inside the gun as long as you have it apart.

Posted on Aug 06, 2012

H2_Brad
  • 425 Answers

SOURCE: Nail gun problem

This is a bottom fire tool. (NV83A2) You need to hold the trigger down and then as you place the nailer to the wood the safety will depress and it will fire once. This is usually done in one, swift action. If you do this in the opposite way by placing the tool to the wood and then pulling the trigger they often will double fire.

Posted on Aug 22, 2012

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1 Answer

I pull the trigger and you get a air sound but no firing of nails . You get air release from top of gun


Could be just a lack of lubrication in the headvalve /orings or the safety foot is not pushing in the trigger pin all the way. Easy to check. Remove the head and pull out the head-valve. Apply plenty of white grease or silicone paste to the orings and the surface where the orings make contact. Install the head and test. If the gun fires then you are done. If the gun does not fire, make sure that the safety foot is depressing the trigger valve all the way in when attempting to nail. Simple test is to remove the trigger exposing the firing pin. With nails removed and air connected, with quick motion depress the firing pin all the way in. If the gun fires make adjustments to safety foot. If the gun still does not fire (with headvalve lubed) replace the firing valve core part # ca0108. Good luck

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2 Answers

Nail gun will not shoot a nail


Check the safety trip make sure it is pushing back far enough. If it doesn't then it won't do anything. When it was fine just moments earlier.

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1 Answer

Nail gun problem


This is a bottom fire tool. (NV83A2) You need to hold the trigger down and then as you place the nailer to the wood the safety will depress and it will fire once. This is usually done in one, swift action. If you do this in the opposite way by placing the tool to the wood and then pulling the trigger they often will double fire.

Jul 05, 2012 | Nailers Hitachi Nv83a2 3 14" Coil Framing...

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

I have the 2 1/2 Hitachi for nailing siding. The nail gun had not been used for a couple of years, but now will only drive the nail half way in. Sounds like an air leak when driving the nail. I have...


Remove the nails and air supply. With side door open notice position of driver. Driver should be at top position with tip not visible. If driver is down and it moves within cylinder when you tilt nose up then down again, time to replace orings. If driver is down, it should extend past the nose about 1/4 inch (if driver is broken at the tip the end will look rough and nail will not drive in all the way). If driver extends past the nose more than 1/4 inch then lower bumper may be breaking up /cracked. Easy test for proper function. With nails removed and side door open, connect air to gun and dry fire gun against hard rubber or old coiled air-hose (with air connected and trigger depressed, no air should leak from trigger area, if air leaks when trigger is depressed, look for fault at trigger pin). Feeder should move back then forward in quick motion almost matching speed of driver and driver should not creep down between shots. No air should leak from nose of the gun (push nose against hard rubber and depress trigger and hold in this position, driver should stay down with very little or no air leaking out of nose, when you release trigger, driver will return). If air leaks out of nose while holding in this position, replace lower bumper. If a quantity of air leaks from valve in front of trigger, cylinder orings may need replacing or outer part of cylinder has fine scratches (remove scratches with 400 grit paper). Parts are available at www.toolpartsdirect.com. Good lucki

Apr 16, 2011 | Nailers Hitachi Nv83a2 3 14" Coil Framing...

1 Answer

Fires 2 & 3 nails every so often.


Most all nail guns can be converted to single fire, however, usually parts must be changed. Some brands have two positions on the trigger, others have a button position near the trigger to accomplish same. Check with dealer or email your gun model # and I will explain your to fix. For now you can replace the spring on the safety with one slightly stiffer. Also try nailing with trigger depressed and quickly bump the gun to fire, this method usually works better than placing the gun in position then firing. Good luck with your repair.

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1 Answer

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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2 Answers

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Professional-grade varieties are automatic, and fire a nail directly upon pulling the trigger. A semi-automatic nail gun is more appropriate for beginners, since it requires a two step process: pull the trigger and then tap the barrel against the wood. This safety feature protects the user from accidentally firing a nail gun and injuring himself or others.

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