Question about Stanley Bostitch N80CB Coil Framing Nailer

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HOW TO REPLACE TRIGGER VALVE - Stanley Bostitch N80CB Coil Framing Nailer

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Make sure air is not attached. take out the two roll pins holding the trigger cartridge in. pull it out and check inside to make sure nothing stays in. you should see the metal in the handle. You have to have the trigger valve for that gun. press it in and replace roll pins. good luck

Posted on Sep 02, 2010

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Most likely stuck trigger valve. Easy to check. Remove nails, remove trigger to expose the firing pin of trigger valve. Connect air and very quickly depress the firing pin all the way in. If the gun fires , adjust the safety to depress the trigger valve completely. If the gun does not fire, replace firing valve, or remove and check /lube o-rings in valve. Good luck

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Remove the head and lube the headvalve with white grease. If gun still does not fire and makes air noise at the trigger valve then orings within the trigger valve are worn. Replace the trigger valve or if you have a source for small orings, just replace the two orings on the metal stem (2mm x 1.5mm). Dewalt uses vinyl orings on the stem that fail. Replace with buna. Good luck

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I am not familiar with that model number, however if your nailer has a round plastic trigger valve, it should be easy to replace. Most bostitch nailers use a TVA6 valve that sells for about $20.00. Better to replace the valve because, if plastic, the firing pin in the valve becomes very worn/loose over time and orings will not work. Easy to check. Remove the trigger and try moving the firing pin from side to side. If it moves, replace the valve. If your gun has a metal threaded-in valve, remove the valve and replace the orings with generic. Usually 2mm on the pin and 5mm on the inner spool. Local bearing company can measure them for you. Good luck.

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Remove the pin holding the trigger. Remove the roll pin in the body of the gun just above the trigger valve. Using heavy glove or handfull of shop rags to catch the valve, apply air to the gun. Use lower pressure than normal on first attempt because the valve will pop out with force. Notice how the valve is held in place with an indention on the trigger valve and roll pin. Align valve correctly when installing new valve. Lube orings to valve with white grease or silicone paste. If you have a source for orings, you can repair the old valve and keep as spare. All you need is to replace two rings on the stem (2mm x 1.5mm). You will need to replace two orings inside the gun that seal the cylinder to the cylinder spacer (replace all the gold vinyl orings as they fail very quickly ). Good luck

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Air rushes out of trigger area as soon as air hose is connected.


Remove the trigger to expose the trigger valve then un-screw the valve. If you have access to orings, pull apart the valve and replace orings (5 orings in the valve and one external oring ((external oring usually ok)). If you would like to replace the valve complete, the part number is ( PB205ba1) and is available at www.toolpartsdirect.com. Good luck with the repair.

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I have a Model T55S5 17 Ga Bostitch Staple gun. It just started leaking at the Trigger while waiting to be used. Was working right along.


The trigger valve has about five orings and will usually begin to leak before it fails. Replace the valve with a (#TVA6) valve available at www.toolpartsdirect.com or universal trigger valve from ebay. Either case the valve is about $20. Remove the trigger and roll pins holding valve thru body of the gun. Good luck.

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Older coil350 doesnt fire on single fire. works as its supposed to on bump fire. Single fire just puffs a little air and thats it.


As the contact arm and trigger inner lever wear, the trigger will not push the trigger valve pin all the way in. The pin on the trigger valve also wears. One deficiency or a combination the three problem areas is causing the problem. Remove the trigger and look carefully at the inner lever (thin metal part ). If it looks rather worn and the trigger itself fits loose on the retaining pin, replace with new. Replace the trigger valve if the center pin seems loose in the valve and looks like it has worn shorter. ;Good luck.

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1 Answer

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The trigger valve has seven orings. The oring kit may not include all orings needed. To replace the trigger valve, remove nails, remove the rollpin holding the trigger with 3mm driver to expose the trigger valve. Next remove one or two roll pins holding the trigger valve in the body of the gun. Apply air pressure to gun and catch the valve with gloved hand (use caution because the valve may come out with force). Note the position of the valve in the body of the gun in relation to the roll pins. If the firing pin seems loose in the body of the valve, replace the whole valve(could be # tva6 cost about 20 dollars on ebay). Good luck

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1 Answer

My nailer has a large air leak around the plastic button under the trigger is this the prob,and how do i replace the plastic part


To replacement trigger valve, remove trigger, then remove two roll pins holding trigger valve in body. Apply air pressure to gun to pop out valve(use heavy glove to catch valve as the air pushes it out) . Use caution because the valve can pop out with force. You may try to replace the bad oring before ordering the new valve. Orings are available at Lowes or at your neerest bearing store. Of orings are not available, order replacement valve from address below:



https://www.boschtoolsservice.com/Order/IPL/IPLDetails.aspx?tn=3601d91b10&mn=RN175&init=1


part number of valve:
2610001706

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