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My senco 1/4" crown air stapler would not drive a staple & now leaks air constantly

Had been in storage a while, fired intermittenly, then did nor fire, and then began to leak ait constantly. It has always been oiled before using

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It sounds like you have broken or damaged o-rings inside the gun and the only repair is to replace them. Senco does make kits to rebuild most of their guns. Go to http://www.senco.com/ and click on 'Parts Charts' at the top of the page then find your model. The PARTS GUIDE will list a rebuild kit if one is available. The part number will start with YK followed by four numbers. If there isn't a rebuild kit available for your gun, you'll have to order each o-ring seperately. All o-ring part numbers start with LB.

Posted on Feb 20, 2012

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It is always best to list which model you have. The older Senco SKS for instance used a head valve that is only available as an assembly. They are not serviceable other then replacing the complete assembly. And while this tool was listed as an oil-less tool it is still a good idea to put a small amount of oil in there. The trigger valve for those was also replaced as an assembly. On many of the various makes and models of air nailers and staplers it is not uncommon for the head valve to get stuck if it has sat for awhile. They will usually shoot once then start leaking from the exhaust port on the head.

Posted on Mar 06, 2012

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Posted on Jan 02, 2017

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SOURCE: Senco narrow crown Stapler Piston will not go back

There is a spring and piston in the back cap of the nailer, this must be free moving and not sticking. If it is sticking it will cause the problem you discribed. If that looks ok you probably should install an o-ring kit and that should solve the problem. A Senco service center will carry the proper parts.

Posted on Apr 16, 2009

ariftariq
  • 91 Answers

SOURCE: the problem i'm having is with a senco sn 41 stapler the driver wont fully return to the top

Hello try to put some oil in the connection of top and bottom may be this might help. please rate my comment

Posted on Nov 21, 2011

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