good video ive been replacing o rings on a hitachi nr 90 ae. trigger assembly i didint see any repair video on this gun anyway i still havent got it right
Thanks for your video. Where the air was leak? From the front where the nails go out or by the trigger? I have replaced the orings inside but all air exit by the front where the nails go out and no leak by the trigger.
I did this a long time ago. Basically the white o-rings will decompose. Those are the ones that leak. As far as the trigger, either buy a replacement or get the o-ring kit to rebuild it. The trigger is very sensitive to the kind of lubricant you use.
@@spudth Thanks Chris, unfortunately even if I have replace white o-rings ( was decomposed too ) with a new o-ring rebuild kit, the air flow continue to exit from front. I replaced also the o-ring at the trigger but same issue. When I open the nailer pump, before I close it, I put the piston at front of the cylinder, when I put the air I can listen the piston back and hit the muffler, the air exit from the front where the nails exit. I dont understand why its happend. The seals are new ...
I bought mine from ebay. Search title 'O-Ring Kit for 5140095-73 DeWalt Nailer Nail Gun Trigger Rebuild'. It may be reasonable to just buy a trigger assembly complete as they are very precise and need a certain lube. Also be sure the white o-rings inside are in good shape.
I don't think so but there's just a pin you push out then the trigger comes right out. I purchased a battery powered metabo HPT nailer. No more compressor, no more air hose. I do miss the larger magazine-20 nails geos real fast.
Search this title "O-Ring Kit for 5140095-73 DeWalt Nailer Nail Gun Trigger Rebuild" Remember to choose a correct lubricant as transmission fluid will swell the rubber.
Extremely helpful my friend I had the same problem took me a little bit to figure out. You hit the nail on the nose. My unit's been packed away in a drawer for about 10 years after thousands of nails and I suspect should have been put away lubricated as well. But I did get several hundred nails through before it went tits up on me. Thank you good instructional video straight to the point.
