Question about Hitachi NV45AB2 Roofing Coil Nailer
If air leaks thru trigger as soon as you connect airline, replace the vinyl ball under the trigger stem. If air leaks when you depress the trigger, replace the small oring on the trigger stem. If air leaks slightly from plunger in front of the trigger valve, problem is inside of the gun. Remove the head and pull the large circular plate. Replace the large outer oring. Good luck
Posted on Apr 21, 2014
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Posted on Jan 02, 2017
You replaced all the orings and I take it that you lubed them a little with a light grease. By exhaust valve I assume you mean the plate on top and if so it could be a couple things does the air leak out when you connect the hose and don't do anything if so if you have a dead blow hammer try "tapping" on the top cover with the air connected, some times when replacing the rings the cylinder doesn't seat right away. If it leaks when you depress trigger then I would look for a cut o ring. Let me know and we can fo further
Posted on Mar 11, 2009
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