Question about Duo Fast DuoFast 1015141 CNP65Y Siding Coil Nailer 1 142 12 Inch

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Coil nailer wont feed nails, fires no problem

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Remove nails from the gun and dry fire the gun by bumping it against thick rubber mat or coiled up rubber hose. As the gun cycles notice the feeder moving back then forward in time with the cycle. Make sure that the feeder is connected to feeder driver with a roll pin and that the check feeder is in place in the latch door. The check feeder is thin metal and should have spring action. The driver should return completely to top of cylinder with some degree of force. There should not be much air leaking out the nose as the gun cycles. If a quantity of air is leaking out nose with each cycle, then lower bumper may have broken/cracked. Replace as needed. If very little air is leaking out nose with each cycle then driver could be bent, piston oring could be worn or lack of lubrication in cylinder. If all lower parts seem good, then only area left to check is head valve. There is a 1/4 inch dia. rubber ring at the very top of head that could restrict air flow out of exhaust port. Adjust as needed. Good luck.

Posted on Mar 19, 2011

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Related Questions:

1 Answer

What is wrong when the nails Break from the wire coil when feed


I am going to think that you have a problem with the nails. They should not break from the coil until fired and if they are falling,breaking off that is the coil. I would suggest trying another brand or coil. The correct air pressure for a nailer is arund 90PSI. Let me know if you still need assistance.

Mar 04, 2012 | Air Tools & Compressors

1 Answer

I changed the feeder springs in my hitachi NV83 a2 and it wants to double fire and jaming up the driver with seconded nail. it was skip nailing before i changed springs. any help you could give me would be...


Your nailer is a very heavy duty nailer with very powerful blow. Works best with full size nails, not 2 inch range that are used in fencing, they are not spaced correctly for your gun (like hitting number 6 nail with sledge hammer). Open side door and remove the nails, leave the door open and dry fire gun against piece of rubber or old coiled air hose. The driver should return all the way up between shots and the feeder should move back then forward just as fast as the driver moves. If the feeder seems to move in slower motion then pull feed piston and replace orings and remove debris from feed cylinder. If the driver seems to stick out further than normal then lower bumper could be breaking up causing debris to enter feeder. Make sure that the driver is not bent and has a squared bottom, if rounded, remove and grind square. Finally adjust the depth control up or down slightly and bump fire for test, do not place gun on the work then fire. good luck

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

1 Answer

I have an Hitachi NV83A2 it won't feed nails anymore. Everything else seems to work properly. After about 20 or so hits on the trigger it will feed the odd nail? I am puzzled as to which course of...


could be a couple areas to look at. First lok at the coil of nails and possibly try another one. Check the adjustment of the coil for proper feeding. If all ok there, remove the coil and get a block of wood and safety glasses. Open the door and "TAP" the nose on the block of wood and look at the driver does it fall down into the lower area without the trigger, if so the piston o ring is worn not allowing it to fully retract and advance the next nail. If not apply air and DRY fire the nailer while looking at the feed piston/pawl, it should snap back and forth, if not there is either a worn oring or debris in the air passage. Also the pawl should have resistance if you push outwards on it. Sounds like a lot but only takes a couple minutes to see where issue is. Let me know if I can help

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

1 Answer

It will shoot first nail but won't feed the next nail


could be a few problems, the feed piston might be sluggish, the spring might be missing off the feed pawl, the collation of the nails or a bad coil of nails, the driver might not be retracting fully. Now for the way to check some of these. First look at the coil of nails and the adjustment on the magazine, the nails should pull freely off the coil. Next remove all the nails and using a block of wood "dry FIRE" the tool with the feed door open to check the movement of the feed piston, it should snap back and forth and if it doesn't that would probably be your problem, could be dirty/worn orings or debris in the air chamber. UNPLUG air hose and check for the finger spring that holds the feed pawl tight and check the pawls for wear and asphalt not allowing it to catch the nails. Lastly fire the tool and check the piston, did it retract fully allowing the next nail to advance? if not you would need to probably replace the o rings in this tool. Let me know if you need more assistance. And if I have helped you would you please vote accordingly, thanks

Mar 16, 2011 | Hitachi NV45AB2 Roofing Coil Nailer

1 Answer

My milwaukee roofing gun works for a couple hours but then it wont feed the nails properly so it doesnt fire the nails anymore. what can i do?


It's quite possible that the areas through which the nails move in the tool need to be cleaned and or lubricated with light oil such as WD40. Rust or dirt from nails can build up on surfaces in the unit.
Check your manual for details.

Feb 16, 2011 | Milwaukee Tool Milwaukee 7120 - 21 Coil...

1 Answer

My N12 stops feeding after every 2 or 3 nail.


could be a few problems, are you using the right nails with the proper collation. is the magazine set correctly for the nail size, is the piston retracting fully to advance the next nail, and is the feed pawl spring broken and or is the feed pawl moving freely, to check the last one remove all nails and open the door that would guide the nails and fire the tool and look at the feed mechanism to make sure working properly, sometimes the bumper starts to disintegrate and pieces get stuck in the air hole controlling the feed. Let me know if you need more clarification or help

Nov 29, 2010 | Stanley Bostitch N12 Coil Nailer...

1 Answer

Nail gun is miss fireing sometimes might only fire 1 in 4 nails fired


remove all the nails and remove the air hose. BUMP the tool on something and does the driver come down on its own if so it needs new o rings. also take a look at the feed pawl for a broken spring that would prevent it from feeding nails and lastly look at the coil of nails to make sure they pull freely. Let me know if you need more assistance.

Sep 10, 2010 | Hitachi Tools & Hardware - Others

3 Answers

My bostitch rn46 seems to double or triple shoot nails frequently. Am I not using the tool properly or could there be a mechanical problem with the tool?


if u are right nails for gun,then make sure when u put coil in and feed in front of firing pin the nails are straight with pin and connecting wires are not bent causing nails to fall out of alingnment.

Oct 02, 2009 | Stanley Factory Reconditioned Bostitch...

1 Answer

It will double fire sinking second nail only half way. This happens every third or fourth shot. The nailer is a Hitachi NR 83A 3.25in. X .131


the pin pushing your nails is loose and the guides are warned .
try to change the guides and you will see that this problem will will be gone .
one last thing , make sure the coils are in good shape as it may create some feeding problems and push 2 nails at once

Sep 26, 2009 | Hitachi VH650 2 1/2" Full Head Fencing...

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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