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Bostitch n80 framer blow by by trigger asemably

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Your nailer incorporates the (tva6) trigger valve. It is available online at www.bostitch.com, cost is about $20. To examine the valve, remove nails, remove retaining pin holding trigger, remove one or two pins holding tva6 valve (the pins holding the valve are in the body/handle just above the trigger. use punch that fits snuggly in a 3mm hole). Mark the valve in relation to the body of the gun. After several pins are removed apply air pressure to pop-out the valve. Use caution because the valve can came out with force. Reduce air pressure and use heavy glove to catch the valve. With tva6 valve in hand, notice notches on side of valve for roll pins. Remove two more pins to expose the inner valve. The middle seal of the inner valve is usually the problem, it could be cracked or fits too loose. You could try replacing the seal with a tight fitting oring. May work. or just replace the valve. Good luck with your repair.

Posted on Apr 20, 2009

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How do i rebuild my bostitch n80 frameing nailer


Bostitch nailers are simple to rebuild. Bostitch company was sold to Dewalt so parts are now easier to obtain from local Dewalt service center. Use Ork11 oring kit and tva6 trigger valve. These parts are also available on ebay. Good luck or your nailing projects.

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I Have a N80 Coil Nailer. It was given to me without the manual. I down loaded a manual, however it is not clear how to set the nail depth. Can you advise?


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My hitach nr83a just blows air out the exhaust when pluged in and wont shoot. is this a trigger or exhaust problem ???


Your problem is most likely where the cylinder / head come together. In the Hitachi framers, the cylinder is designed to move up and down (unlike Bostitch where the head valve moves) so if the O-rings are dirty or broken, or the spring under the cylinder is broken - the cylinder won't make a good seal to the head valve.
You can try plugging the tool in and giving a couple of firm taps straight down on the head with a rubber mallet - if the leak stops or slows you'll know the problem is with the cylinder movement.
Check the head valve seal - often they get sand / debris embedded in them which prevents the cylinder from making a good seal.
It is rare for a Hitachi trigger to be a problem.

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Bostitch N80C. When I connect air to gun it leaks from cylinder cap - (exhaust ports) Piston stays forward when under pressure.\r\nPushing safety and/or pulling trigger have no effect on problem. Tool is...


Most likely a seal is leaking which is preventing complete reset of the tool to the firing position. Follow the instrucitons in the link below to get to a site that will provide a diagram of the gun and the parts list. I would recommend replacing all of the o-rings and a good cleaning and lube.

Dan

Link: http://www.fixya.com/support/r5812776-bostitch_nailgun_dis_assembly_assembly

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Nail goes in to deep,when i press the trigger


Bostitch n80 utilizes a driver with a threaded piston which may be adjusted to required penetration. Use thread lock to keep in place. If piston is not out of adjustment then lower bumper may be breaking down from heavy use and allowing piston to travel too far down cylinder. Remove head being carefull about gasket, remove driver and examine bumper for missing pieces. If it looks good check for loose piston on driver. Repair as needed. Parts are available at www.toolpartsdirect.com Good luck on your repair.

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Blows air out of trigger


I assume this is a Bostitch tool and if so there is a broken o ring on the trigger valve assembly that needs fixed. Go to Bostitch.com with your model number and you can buy it online. If other than Bostitch give me the model number and brand and I will try and find a breakdown.

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1 Answer

My Bostitch N80 fires full auto when I hook it


I would check the safety first to make sure not stuck because this tool is a bump fire. Let me know and then I will find a kit and schematic for you or you can go to Bostitch.com and find the parts online, but I honestly think that you have a safety issue or the trigger valve is malfunctioning.

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1 Answer

Leak inside Bostitch N80 Nailer, won't drive nails


If the unit is leaking it most likley need a rebuild kit. Go to a Bostitch service center and ask for an ORK-11 kit. That is all the o-rings needed to do an over haul. Or just have them do it.

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1 Answer

Blow by


If the nailer is leaking out the trigger, it has to be replaced. If it is coming out of the exhaust then it needs an overhaul kit.
Parts are as follows
Trigger valve P/N TVA 11
Overhaul Kit ORK 11
Hope this helps

Apr 20, 2009 | Tools & Hardware - Others

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