Question about Hitachi Nv45ab2(s) Coil Roofing Nailer
I have looked on-line for a local store in cincinnati ohio that sells feeder spring for a hitachi roof nailer. I'm unable to find somewhere that sells them. I have found them to be shipped but all of them take 3 weeks shipping and I don't want to wait..
You can use an oring in place of the feed spring until you get the factory spring. If no supply for orings, use several of the rubber bands that come on the coil nails. Remove the broken spring and streach oring between one side of the retainer pin and the other. If the oring is snugg enough, it will have same spring action on the feeder as torsion spring. Have several torsion springs in stock for future use. Also check the condition of the retainer pin. If the pin shows signs of wear, replace it because a loose pin will allow the feeder to move around too much.
Posted on Dec 02, 2012
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Posted on Jan 02, 2017
Take off the back cover and make sure it's not too dry inside. Spray the inside with some WD40. You can take off the top cover. Pop the piston, cylinder, and head valve out, making sure all the seals and rings are seated correctly.Sounds like the piston is momentarily sticking. Does it shoot at all? Lemme know. Please rate me
Posted on Jun 18, 2009
SOURCE: my nailer leaks air out the back
Hitachi nailers are built on very close tolerences. Dirt /grit will prevent cylinder from resetting causing air to leak out of top of gun. You can force a reset by striking the gun head first against a rubber mat. Only one or two hits because you could damage the head. If the gun does not reset you will have to take apart and clean out grit and replace orings as needed. Good Luck and post again if you have other questions.
Posted on Mar 20, 2010
Remove nails and disconnect airline. Open door latch and check for back and forth movement of the feed piston. It should move with little force and should have spring tension when you push on the leading edge of the feeder. If very hard to move then most likely orings are swollen or stuck from lack of lubrication or water entering gun. Remove head being carefull not to tear gasket and check piston/ oring for tight fit( the piston will not come all the way out, just enough to repalce oring). If very tight then all orings should be replaced. If just dry, lube with silicone paste or proper oil. Check that the cylinder retracts into body of gun and rather easily pulls back up. Do not use pliers on the the cylinder; it is spring loaded and shuld move with finger pressure. Parts are available at www.toolpartsdirect.com. Good holidays
Posted on Dec 29, 2010
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