Question about Dewalt Air Tools & Compressors

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There is a flow of air continually blowing from the gun at the nail loading location, causing it to fail to properly sink the nails into the wood

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Can't be specific without model number, however, air leaking around nose area (where driver strikes nail) is indication of orings not sealing around cylinder spacer and body of gun and/or leaking at cylinder spacer and cylinder. Most likely grit has entered the gun and has begun to scratch metal and orings. Time for a reseal kit available thru Dewalt service center (or if you are a tinker-er, remove head and pull cylinder, remove fine scratches on body of gun with fine sandpaper and lube with plenty of silicone lube paste ). Final note, air could be leaking between cylinder seal at top of cylinder and headvalve. Air leaking here would also come out of gun thru nose, but the driver would be pushed down cylinder with nails removed. If no scratches are found and orings appear to be in good shape, then suspect this seal.
Dewalt used vinyl orings (gold colored) that do not last allowing leaks. The orings that come in their repair kits are also vinyl (not good). If possible replace bad orings with buna-n or viton from bearing house. Good luck

Posted on Mar 29, 2011

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Miss fires and wont sink nails depth set deep and pressure over 120 psi


If no air is leaking from gun, miss-fire is usually caused by worn or too tight piston oring or lack of lubrication. Easy test. Disconnect airline, remove nails, point nose of gun up then down. Driver should stay in uppermost position. If driver moves up then down within gun replace piston oring and retest. Set pressure to about 100psi. Good luck with repair.

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1 Answer

Nails fail to feed


Without knowing your model number here are some things to check, in order of difficulty:
1. First make sure you're using the proper nails for your gun. If your gun isn't specifically listed on the box of nails as compatable make sure they are seating in your gun properly. Some brands of angled nails are a couple degrees off from others and won't work in competetor's guns.
2. Check the entire feed path of the nails in the magazine all the way up to where the driver catches the next nail. Sometimes dirt builds up in the track or there could be a peice of nail stuck in there preventing the nails from getting under the driver. Also the spring on the feed shoe should have strong pressure on the shoe all the way up to the head and the shoe has to ride freely in the magazine.
3. If the gun is making holes in the wood the driver isn't broke but it must be straight and true and the tip square. If not it will miss or slip off the nail before driving it. The only way to check the driver is to remove the head on the gun and take the driver out. The piston & driver should travel from the top to the bottom of the cylinder without binding anywhere. Correct any problems you find or replace any damaged parts and your gun should work.

Feb 13, 2012 | Porter Cable 16 - Gauge Finish Brad Nailer...

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I have a 16 guage Bostich nail gun that has worked perfectly with the nails supplied with the gun. We purchased more Bostich nails and they are making a U-turn in the wood and coming back out. This is...


I would check first for the proper guage nails that you bought and then what is the capacity of the tool. You didn't specify the model number but I would think one or the other. then also check for the wood being nailed into. All could lead to your problem.

Feb 20, 2011 | Air Tools & Compressors

1 Answer

Using recommended 3 1/2" nails; cannot get the nailer to sink the nail all the way to the head. Depth is set to max and air pressure within recommended range of 70 to 120 p. s. i. g.


remove the nails and air hose. tap the gun lightly and does the driver fall down?? if so it needs new o rings and doesn't have enough seal to drive the nail. also look at the condition of the driver. FOLLOW CLOSELY, reconnect the gun and remove the nails pull back on the follower and using a piece of wood to activate the safety hold gun at an angle, weara safety glasses and depress and hold trigger to expose the driver, does it extend past the nose and LOOK DONT TOUCH to check the condition of the end. release the trigger. this should give you some ideas why. also recheck the nails for proper collation and head are they clipped or full round. Let me know and I will try and help further. READ closely before attempting the above ideas.

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1 Answer

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The FC350A uses a 30- to 34-degree collated clipped head nail which is very similar to the Paslode 34-degree round head nail. Paslode's nails are unique because the round head nails collated very close together and the head of the nail is offset to the shaft unlike Porter Cable full round head are further apart and the head is centered on the nail. What does all this mean? The Paslode round head nail may work however the driver will deliver the blow off center to the shaft of the nail, This could cause the nail to bend as it enters hard wood and possibly jamb the gun. You should be able to exchange the nails (with small restock fee) at a major fastener store (not Lowes or etc. ) with out having purchased them at location because the Paslode nails are very popular and with todays economy the store will gain a new customer. If however you would like to try using the nails, try the following. Remove the head of the gun to expose the driver. Install the nails as usual and with **** of small hammer quickly and firmly push driver all the way down the cylinder to see if nail is easily pushed out of bottom of nose. (You can push driver back up with long thin screwdriver or allen) If successful, replace head and connect to air however lower pressure to 40-50 psi and nail into soft wood increassing the pressure little at a time with each test untill full pressure around 90-100psi. Good luck

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1 Answer

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its double firing, after firing gun pull back, what is happening is when you fire a nail your pushing the gun back onto the wood and its putting another nail in

May 08, 2009 | Campbell Hausfeld 2" 18GA Brad Nailer

1 Answer

Air never stops coming out of gun nail,and gun doesn't sink nails


strip and clean the gun ,you will find that replaceing the seals will help no end
best of look ian

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Yes, because there is less risk of splitting the wood grain when using a nail gun than when using a hammer, nail guns are especially useful in delicate projects such as the application of indoor trimming. A nail gun sets the nail in one motion, reducing the chance of slips and bumps that can ruin delicate woods. Most models also include a rubber safety nose to protect the wood from friction.

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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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The real different between nail gun's models are the sort of power supply they use. A nail gun can be powered by compressed air, electricity or batteries, or electromagnetism. Some small guns are powered by butane, a fuel that causes a small explosive charge to drive the nail into the wood. The most common type of nail gun is the pneumatic nailer, which works with compressed air.

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