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Posted on Jan 02, 2017
I have seen many small bostitch guns all with different problems that did not shoot nails. Both of your guns have simillar triggers. You might try the trigger valve from the gun that works to see if that is the problem. Most no fire situations come from faulty trigger valve. The trigger valve used in your guns has a part that stays in the body of the gun; be sure to replace both parts. If still no fire check the following:
Remove the head and check if the piston/driver travels all the way down the cylinder with the tip of be blade showing at the nose. Some piston/drivers have a grove that must be aligned.
Check that the headvalve travels into the head and returns. Push the valve in with your thumb then cover the small vent hole at the base of the head where the gasket sits with your finger and release your thumb. The headvalve should be held in with vacuum then pop up when you remove your finger from the vent hole. If the headvalve does not stay pushed in with the vent covered, the orings are leaking and can cause the gun not to fire. Try lubing the headvalve with light grease such as silicone lube. Do not use bearing grease. Silicone lube is available in small amounts at plumbing supply/lumber outlets such as Lowes. It looks like wax feels like shortening.
Reassemble the gun and check your work. I test the gun with-out nails and without the trigger installed. Just place the nose of the gun on a piece of rubber, (I use a piece of heavy garden hose rolled up tightly into a coil) and press the trigger valve pin with your finger. The reason that I leave the trigger off is that sometimes the problem is caused by the safety mech not pushing the trigger pin correctly. enjoy
Posted on Nov 29, 2008
If the nailer is passing air from directly out of the trigger valve, it must be replaced (P/N-TVA11). If it is passing air from anywhere else, (eg back cap or front ) it needs an O-ring kit (P/N- ORK11)
Posted on May 28, 2009
Your nailer uses a trigger valve part # tva6 (or tva1, but use tva6) (cost about $20) and is sold at www.bostitch.com or ebay for generic. If you have a source for orings, you could try to repair the valve. Remove the roll pin that holds the trigger to expose the tva6 valve. There are roll pin/pins that hold the valve in just above the valve in the body (Use punch for 3mm hole). Remove these pins and apply air pressure to gun to pop-out the valve. Use caution when you do this. Remove nails, lower pressure to gun and use glove or rag to catch valve because it could come out with force. Note the two grooves on the side of the valve where retainer roll pins hold valve. Remember to insert the valve with these two groves aligned with path of roll pins. With tva6 valve in hand remove two pins that hold valve together and remove inner plunger. The middle oring/seal on plunger is cause of leak. Try using an oring with smaller inside diameter than the broken or loose fintting seal that is present. It must fit pretty tight and be slightly thicker than 1/16" to work. Remove the outer orings to valve and clean and re-use same. Clean the valve port in body of gun and check for sharp edges to prevent cutting orings before inserting the valve. Use silicone lube or oring lube on the orings and the valve port (Danco silicone paste sold at Lowes in the plumbing department). Good Luck on your repair and email if you have other questions
Posted on Jul 08, 2010
SOURCE: bostich rn46 . gun will
Assuming that there are no leaks, remove head and pull headvalve. Look for fine scratches where oring contacts head. If there is a deep groove worn into head or scratched, sand with 400 grit paper to restore smooth surface. If badly worn replace head. Reinstall parts using silicone paste (looks like vaseline, sold at lowes in the plumbing department, used for faucet orings) )
Posted on Nov 01, 2010
Here is the parts list for your gun:
The trigger valve is a tva6 and can be ordered from ebay. Generic valve works ok and saves money. I do not believe that individual parts are sold for the valve. If you have a source for orings, you could try to repair the valve. Remove the roll pin that holds the trigger to expose the tva6 valve. There are roll pin/pins that hold the valve in just above the valve in the body. Remove these pins and apply air pressure to gun to pop-out the valve. Use caution when you do this. Remove nails, lower pressure to gun and use glove or rag to catch valve because it could come out with force. With tva6 valve in hand remove two pins that hold valve together and remove inner plunger. The middle oring on plunger is cause of leak. Try using an oring about same size as the broken seat. It must fit pretty tight to work. If you had a small leak it could be that the firing pin orings fit too loose or just too worn. Use silicone lube or oring lube on the orings and the valve port. Good Luck on your repair and email if you have other questions
Posted on Nov 17, 2010
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