Question about Hitachi NR90AE Full Round Head Framing Nailer
Posted by Anonymous on
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Posted on Jan 02, 2017
Yes, BUT the paslode Round drive nails and known to cause driver jamms due to the excessive paper used in the spacing of the nails.
Posted on Oct 31, 2009
Are you using full round head nails?
The hissing indicates your O-rings are worn out and need to be replaced. This is not covered by warrenty and is common for all nail guns. Lots of kits are available on Ebay or your local Hitachi service center should stock them.
Hope this helps,
Posted on Jan 22, 2010
You must have broken tip or out of adjustment. Easy to check. Remove nails, and push safety against scrap air hose or rubber to absorb blow and squeeze trigger. Piston will stay in the down position until your release safety (on some models you will need to pull back on feeder sligtly). While piston is down examine the end of the driver for nice squared off tip protruding about 1/4 inch beyond nose. If no tip or looks broken, replace driver. If tip looks complete, adjust for more depth. Good luck
Posted on Sep 07, 2010
SOURCE: I have a HItachi NR
Likely that debris is lodged between driver and body of nose or bent driver. Easy fix however.
After many broken drivers, I keep and old driver in my tool box and insert it into the nose of the gun. I have ground the driver slightly thinner to allow for debris or the driver that I am pushing with will also get stuck. A couple of swift raps (use a heavy copper or brass hammer to prevent chips of metal from blasting at you) should push the driver back up into position allowing you to clear debris.
If after a couple of hits and the driver seems stuck solid, suspect broken driver. Remove the head and see if the driver piston looks cocked at angle. If cocked, driver broken. Remove cylinder and remove broken driver. If piston looks square in the cylinder, most likely very stuck driver.
With cylinder removed place body of gun on plywood and hammer on the rod that you are using to push.
After clearing problem and with the gun open, clean all parts with diesel fuel and lube with silicone paste lube (or nail gun lubricant). No need to replace orings if there were no leaks. Look at the lower bumper for cracks and replace as needed. Also make sure that the black band fits snugly around cylinder (black band is one way valve, causes piston to return to top).
Good luck with repair
Posted on Aug 10, 2011
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