The valve doesn't leak until I press the trigger. I get a loud pssst and nailer doesn't nail. Both new valves fail to actuate the gun.
The trigger valve should release air when depressed. This release of air comes from behind the head valve. If the head valve does not pup-up when the trigger is depressed then air is leaking past the head valve orings. Try coating the head valve orings with plenty of white grease and retest. If the gun fires you know that orings are leaking. Test with no more than 100 psi. Good luck with your repair.
SOURCE: air leak
Several models of hitachi nailers share the same orings and other parts including the check ball under the trigger pin in your gun. Remove the roll pin holding the trigger to release the trigger pin, (plastic with one oring) then remove the valve with a screwdriver. Replace the vinyl check ball and seal. Parts are available at www.toolpartsdirect.com. This should fix the problem that you are describing, however use caution and check that the safety if properly adjusted. Enjoy
SOURCE: 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.
SOURCE: Stanley finsish nailer and air is leaking through the trigger as.
If the air is coming out the trigger it must be replaced. Depending on the model of gun you will have to replace the trigger assembly or various o-Rings. Find a Bostitch dealer in your area and they will supply the parts you require.
SOURCE: My paslode air framing nailer
Sounds like a bad O ring. There are rebuild kits you can get with a new set of O rings. Or you can have it done for about $30-50.
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