Question about Stanley Bostitch N80s Nailer -rebuild Parts O`ring & Seal Kit

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I have a n80sb framing gun ,that was leaking air around the trigger assy. So I order a new trigger assy (TVA11) installed it, being very carefull not to harm the o ring. Know I have air coming out of the exhast port all the time. note the new trigger assy. look driffent than the old one\r\nWhat my problem??

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Sounds like the wrong part clickhere these cats got a good list of parts
if' i was of help tell me so i know i didn't lead you astray..
thanks jy

Posted on Sep 12, 2010

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Posted on Jan 02, 2017

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1 Answer

I have a Bostitch N80S stick framing nailer that leaks air from the trigger area. I replaced the entire trigger valve with a new single fire trigger to see if the old bump fire trigger was the problem


Remove the nails and take off the trigger to expose the trigger valve (usually part # tva6). Connect air and spray soapy water on the valve to determine if the air is leaking from the center of the valve or around the outer edge between the body and valve. If leaking from the center, could be defective valve or debris under oring. Pop out the valve and examine internal parts for cut oring or defect. If leaking from between body, you could have cut orings installing the valve. Make sure that there are no rough edges in the body of the gun. Bump fire or single fire happens with the trigger type not the valve. Bump fire trigger is usually black metal and single fire trigger is light color plastic. Good luck

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I have a N80SB stick nail gun that have been leaking air from the trigger valve but was still able to shoot nails. After 3 months of discontinued use, I plugged in the air hose and fire the first nail


A new trigger valve and o-ring kit will give you a like new gun. Just remember to replace all available o-rings in the kit, lightly grease all of them as you reassemble the gun and use pneumatic oil at the beginning of the day so you won't be doing it again in a couple months.

Feb 23, 2012 | Stanley Bostitch Stick Framing Nailer...

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Framing gun not firing leaking air aroung trigger


You have a crumbled trigger seal. You can order a new trigger valve through bostitch. It usually takes a couple of weeks though.. Every time I order one it is on backorder. You will need to order trigger valve kit part number TVA11 $21.40. Go to the Bostitch website click on Schematics and Parts to the left then find your model nailer in the search field and select item 53 when the parts list comes up. Click add to cart to order. Another screen will pop up and ask you if you want to checkout. Any questions please post back.

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Stanley Framing Nailer Leaking Air Around Trigger


Your tva11 valve can be repaired easily if you have a source for orings. I purchase orings from several companies including lowes (in plumbing dept sold in 10 pack for about dollar), www.grainger.com (oring kit metric, cost about $10) harbor freight (oring kit about $5), also orings are sold by size at bearing companies. I have repaired many of these valves by just cleaning debris and lubing with silicone paste (sold at lowes in plumbing dept used for lubing faucet orings). To attempt repair of valve, remove nails, remove roll pin that holds trigger (3mm) to expose tva11 valve. Mark position of valve in body of gun because the retaining pins fit thru an indention in the valve. Next remove roll pin/s that hold tva11 valve, they are just above the valve in the body of the gun(3mm x 30mm). You will need to apply air pressure to gun to remove the valve, however use heavy glove to catch valve because it can come out with force. (try lowering air pressure to gun for this procedure. With valve in hand, use marker to mark position of inner part in relation to outer, remove the two pins that hold valve together. Push out the inner cylinder and look at the middle oring(usually the problem, could be loose or cut) , If cut or loose replace and lube with silicone paste and re-assemble. Check outer orings for nicks, replace as necessary (usually good). Clean valve port, lube port, then re-install valve into gun and insert temporary retaining pin and test for leak. You should be good to go. Good luck and email if you have questions.

Mar 30, 2009 | Air Tools & Compressors

1 Answer

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You can repair this gun. Parts and breakdown are at www.bostitch.com look for service /parts and enter your model number. There you will the parts available for purchase. You will need the tva11 trigger valve. Easy to install. Remove roll pins that hold trigger and trigger valve. Remove the trigger to expose the tva11 valve. With the roll pin/s removed that hold the trigger valve you will be connecting air supply. Use heavy glove to catch valve as you apply air pressure. You may reduce pressure to airline to reduce pop-out force. Before you install the new valve check port for sharp edges and debris. Good luck with your repair.

Mar 16, 2009 | Stanley Bostitch N80s Nailer -rebuild...

1 Answer

N80sb-1 stanley bostitch framing gun.


Yes your nailer will drive other sizes of nails. For info and parts go to www.bostitch.com and look for the support tab then select service parts. Here you will find parts list and manual. To remove the tva11 trigger valve remove the retainer pin (the pin is 3mm) for the trigger and remove trigger. Next remove roll pin/pins that retain trigger valve. Use heavy glove to catch trigger valve as you apply air pressure to gun. The valve could pop out with great force so try lowering the pressure to gun. Before installing the new valve, check the opening for sharp edges which will cut orings. Good Luck and email if you have more questions.

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2 Answers

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Where does the air leak out from? If it leaks from the trigger DeWalt makes a trigger valve assembly part # 641006-00 list 8.89 BUT if it leaks from other areas we have to look into it deeper. If it is just the trigger valve let me know and I will give you instructions how to remove and install the new one.

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BOSTITCH AIR POWERED NAILER - AIR LEAK THRU TRIGGER


sounds like the rubber seals have dry rotted prob from not oiling it enough, but you should be able to go on the Bostitch web site and order new rubber seals for the gun

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