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

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Have a duo-fast cnp65y nailer and have to turn air pressure above 125 psi for it to shoot advance the nails

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  • Pat Clemens Mar 06, 2012

    do you know which orings to replace and where to get them. is there a kit?



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  • 425 Answers

It most likely needs to have the o-rings replaced. Try oiling it first. Air tool oil put into the fitting on the tool where you hook the air hose into. Give it a good squirt of oil too. You really can't over oil it as the excess oil will just mist out of the exhaust. Do NOT continue to use this tool at 125psi as that is DANGEROUS since it is higher then the maximum rated pressure. Also make sure you don't have a bad air gauge that is reading too high. The tool should operate fine at 90-110psi..

Posted on Mar 06, 2012

  • Brad
    Brad Mar 07, 2012

    My supplier does not list kits for this model. But before you decide that is what it needs I would remove the top head and inspect the driver. You can remove the head and without any nails in the tool manually push the driver all the way down. Then looks at the nose of the tool and make sure the driver is extended out from the nose at least a small amount. Make sure your driver isn't broken or messed up first. If all else looks good contact a Duo-Fast dealer. Through the Duo-Fast web site you can find a dealer near you. They may make a kit for these but I have not found any made by the companies that make kits for many brands. When I re-ring a tool (I own a small shop and have been repairing equipment for over 20 years. I even worked for Duo-Fast as a sales rep many years ago before they closed the branch in my town) I almost always use a kit made by Reliability Provin (formally Performance Provin) and replace all the o-rings. If one is worn then usually others are too. The only exception is the o-ring on a driver piston as they will wear quicker then others do and sometimes it is the only one that needs replacement. Often this is a roofing nailer such as the Hitachi NV45AB or the Bostitch RN46 guns.



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SOURCE: I have a duo fast CN 350 nailer and it works ok

You will need to pull the top off to get to it to check it out, If the drive pin is bolted on, make sure the bolt didn't loosen up, most are one piece, welded on, If you don't find anything in there preventing it from coming up, I would grind off the tip, nice and square and flat, then put it back together. I have a feeling you will find a piece of white plastic holding the piston down, part of the head there, It will need to be replaced. Check it out, hope this helps.

Posted on Dec 29, 2010

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SOURCE: I have a duo-fast n350

Three methods to adjust how deep nail will set. On nose of gun is fine adjustment, move contact claw by backing off screw and moving up/down. Replacing the lower bumper with new part will prevent driver from driving too deep into work (new bumper is more firm and probably thicker). Finally, adjust piston on driver blade by turning then re-apply lock tite (adjust piston head closer to work). Good luck

Posted on Feb 23, 2011

  • 425 Answers

SOURCE: what degree nails should be used for a duo fast Cn

The CN350 uses a 20 degree, full round head, plastic collated nails.

Posted on Jul 21, 2011

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