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Fires first nail then won't return driver for next nail

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There could be a bunch of different problems with a nail gun that does this. First and foremost check to make sure you are using the correct angle,diameter, and head nails for the gun you are using. Sometimes this can cause hangups and not allow the driver to retract. After checking this I would let someone who has worked on nail guns before take a look at it. There could be many different causes, too many to list here. Good luck.

Posted on Sep 09, 2009

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Posted on Jan 02, 2017

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Nailer wont advance the nails then it shoots blank


Try ez test to check for proper operation. Remove nails and air supply, point nose of gun up then down again. The driver should not move from the top of cylinder position. If driver is moving up then down replace the driver oring. If driver oring seems ok then connect air supply and bump fire the nailer without nails against soft wood and door open so that you can see the driver and feeder moving. Bump fire the gun and make sure that the driver is moving all the way back up to top of cylinder and the feeder is moving rapidly back and forward. If movement seems ok then hold the nose down on soft wood and depress and hold the trigger. This will fire the gun but driver will stay at the bottom position and not return until you release the trigger or lift the gun. When holding the gun with the driver down position, no air should leak out the top or bottom of the gun. If air leaks out bottom, replace lower bumper, if air leaks out the top replace the upper bumper. Good luck

Mar 19, 2015 | Porter Cable Coil Roofing Nailer

1 Answer

Hitachi nail gun


If gun firing but nails not being driven could be one of two basic problems:
1. Nail jammed in magazine not allowing nails to move up.
Empty magazine, does follower move to top of magazine. Push gun against work piece, does fan motor start? Yes - jam in magazine or lock out bar not operating. (this would allow nail un to fire when out of nails)
2. Piston/driver not returning fully after firing, hence driver blade on top of next nail instead of behind it. This could again be caused by a jammed nail or just a nail head. Another case of not returning is the combustion chamber not making a good seal, check O rings on framer (they are steel rings on bradders) it may just need a good clean it is surprising how dirty they can get and if not cleaned a build up of dirt could break a seal. If not been cleaned for a long time worth checking piston rings, worst case scenario dirt builds up around the rings and stick fully in requiring new piston if the rings will not come out.
Nail guns work on the principle that an explosion pushes the piston driver forcing a nail into the work piece, after the explosion a vacuum is created and it is this that 'sucks' the piston/driver back up the cylinder.

Mar 27, 2014 | Tools & Hardware - Others

1 Answer

Senco nailer won't fire nails, but the firing pin dents the wood almost 1/4 inch.


Hi Jes,

Are the nails moving freely in the magazine if you pull the mag spring back? If so, then the driver blade is not returning to top dead centre - leaving enough of the blade to stop the next nail moving into the nose. This could be caused by a slight back pressure in the cylinder so, check the exhaust is clean and free of any swarf. Or check the O Ring on the driver blade, even though you've just replaced them....

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2 Answers

Bostitch N80SB won't reset after firing


Most likely just needs piston oring. Remove nails from the gun and point nose of gun up then down again. If the piston travels up and down in the cylinder, replace the oring. The piston returns to top with air pressure and needs good snug piston oring and good lower bumper (if bumper is cracked or missing pieces ~ replace ). Be sure to lube the orings in the headvalve with silicone paste or white grease. Part # ORK11 oring kit will reseal the gun. Good luck with your repair.

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1 Answer

Senco fram pro 602 nail gun firers but no nail just a hole from firing pin


First, check that you are using the proper nails. The FP602 needs Full Round Head nails with plastic collation. If you are using Clipped Head nails with the paper tape collation the angle of the nails not let the driver catch the next nail and drive it into your work.
If you have the correct nails, check the magazine to make sure the nails are feeding all the way up to the driver. If there is anything blocking the way or if the spring on the feeder isn't taught enough to pull the clip all the way up the driver won't be able to catch the next nail and drive it in.

May 05, 2012 | Senco Tools & Hardware - Others

1 Answer

I'm trying to figure out why my PC FN250A won't fire nails. I don't see one jammed. What else can I try?


If the driver is not returning to top of cylinder, the nails will not feed into position. Remove nails from the gun and Insert thin tool into nose to verify that the driver is all the way up. If the driver is already at the top of the cylinder, then nails are not feeding correctly (check for debris in rails or for proper nails). If the driver was not all the way up, check for bent driver blade, loose or too tight piston ring or restriction in the headvalve (upper bumper cracked). Good luck

Jan 18, 2012 | Tools & Hardware - Others

1 Answer

Nailer will shoot a nail, but will not foward the next nail. Gun is new maybe 15 lbs of nails or so.


If the nail will not advance, easy test will determine problem. Open door and remove the nails. Lightly tap the nose of the gun against coiled rubber hose or soft wood with door open. If the driver falls to bottom, the piston oring needs to be replaced. The driver should stay at top of cylinder. Next pull back the feeder to rear position and check for tension. The feeder should spring back towards you when you push. Finally, the check paws on the door should return to extended positon when you push on them. Replace springs as needed. Connect air to gun and rapidly bump fire the gun against rubber. The feeder should move back and forward just as quickly as the driver moves. Good luck

Aug 25, 2011 | Hitachi NV45AB2 78Inch to 134Inch Roofing...

1 Answer

Gun fires, leaves good indentation, no nail. WCE working properly, took head apart to look for jam but nothing in there and am using compatible nails. Also oiled it but no luck. Was working fine doing...


Remove nails and use thin tool to push driver all the way up to top of cylinder. If the gun fires one nail then skips, the driver is not returning to top of cylinder. If no nails fire, then nails are not feeding into proper position. Driver must return to top to allow nails to feed into position. Most common problems are bent driver, worn piston oring and bad batch of nails(head too large). Good luck

Jan 14, 2011 | Campbell Hausfeld 2-in 18 Gauge Brad...

1 Answer

N8o stick nailer will fire one nail and then will not return driver up high enough to fire the next nail


how olod is your mailer, sometimes if you leav it in open air it get some rust and you need to use somehting called Blaster or PB that rempve any tust and then use WD40 and let it dry or use air on it and try it again...good luck

Sep 09, 2009 | Tools & Hardware - Others

1 Answer

Feeding nails


Your nailer shares design features with Milwaukee and Ridgid. All three brands experience the same issue. Lets go thru a series of simple tests to determine the problem. First and most simple test, manually load the nails and fire the gun untill miss-fire. Upon mis-fire disconnect air, open latch and check if the driver is all the way up into the cylinder or is partially down blocking next nail. If driver is down blocking next nail, replace the driver oring and retest. If driver is up all the way, remove nails, reconnect airline, leave latch open and fire gun against rubber (old tire or coiled up waterhose/airhose) this time holding the gun down and keeping the trigger depressed. In this position, the driver will remain down and feeder will remain retracted. With feeder retracted and screwdriver in hand carefully check the spring tension on the feeder (should be rather firm tension on spring and the feeder must retract with good force). If no tension or weak, replace feed spring. When you finally release the trigger, the driver will retract and the feeder should return with good force. If feeder does not return with force, replace orings and spring behind feed piston. If all tests are ok, remove head, check lower bumper in gun for cracks or missing pieces. Replace as necessary. Lube all orings with silicone lube available at Lowes in the plumbing department. (Danco brand) Good luck on your repair and email your questions.

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