When trigger pulled a small amount of air comes from trigger but wont shoot

james allen

• 109 Answers
• Posted on Feb 16, 2010

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

SOURCE: Brand new unit. Used last weekend, no problem.

Orings /other parts tend to stick when nailer is new. Dewalt uses some vinyl orings that have been causing premature failure. Be sure to add a few drops of oil when used. Too much oil is not good. Wrong oil will cause orings to swell and cause problems such as yours. Your nailer's firing valve can be reset by rapping the nailer against rubber surface such as a thick rugger mat or coiled rubber air hose. Remove airline and nails, being carefull not to damage the head, rap had against rubber mat and retest gun. If it did not reset rap against nose of gun and test. If no joy, you will most likely need to remove head and manually move cylinder up/down and /or check vinyl orings for failure. Before you try to reset the gun, make sure that the safety is pushing the firing pin all the way in. Air removed, look under the trigger as you push down on safey, if it does go all the way in try bump-firing the gun (for test have nails removed). Hold in trigger and quicky /firmly strike gun against rubber pad. Good luck

SOURCE: my gun will not shoot nails and air is coming out where trigger is when you press triggerr

Dewalt uses vinyl orings in the trigger valve (clear to gold color oring on the firing pin) and are known to fail. You can pop out the valve and replace with new ( part # 603396.00) or try replacing the orings. It is hard to find small orings (i think it uses 2mm x 1.5mm). Also there are two to four orings made of vinyl within the gun. Two between the cylinder and cylinder retainer and two in the head. Rebuild kit may still be available. Good luck