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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, 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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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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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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