Hitachi Tools & Hardware - Others - Answered Questions & Fixed Issues
Faulty micro switch in Hitachi NR90GC
Hi, had the same problem. After market micro switch replacement for Hitachi NR 90GC from RS Components Stock number 682-1888 MPN; D2HWC203MR.Note; this requires soldering in with heatshrink and cutting flyleads to correct length. Part of the alignment issue can be the handle screws working loose over time with use. Don't force anything back when assembling and use a little grease on contact parts.
Why doesn't it fire?
Bad fuel is the #1 reason for this - check the expiration date on the bottom of the fuel cell. Some stores don't rotate their stock, so it doesn't matter if you just bought it.
If you're sure the fuel is good, I would check the cycle -
1) Disassemble the tool, plug the battery in, without depressing the nose, just pull the trigger (Fan should start) If the fan doesn't start, it will either be the trigger or possibly the fan motor.
2) With your hands in a safe location away from the fan blade, depress the head switch (Fan should start & light should be steady green), then pull the trigger - you should have a nice sharp, blue spark.
If step 1 is OK and step 2 produces no spark, it will most likely be the ESU
Hitachi nailer doesn't fire, it has no leaks. When trigger is pulled there is no back pressure from trigger
I've had that happen before and what I found was one of the Staples or nails had misfired and wedged before leaving the gun. read the manual on how to get to it for that particular model and also it might be a good idea to adjust your pressure accordingly to keep it from happening again. If the force isn't set proper then a nail could Jam , block the mouth and not allow any other nails to exit. It's very easy to do and not that hard to fix once you've done it at least once. Good luck.
My hitachi nt50ae2 will not work when I try to use 2 nails.
1) Oil it per the operating instructions.
2) Use only high-quality fasteners. I recommend Hitachi or Bostitch, although those from Harbor Freight Tools are largely trouble-free.
3) Make sure nails are properly inserted in the gun.
4) Check to confirm that your gun is receiving adequate air pressure. With that nailer, I'd suggest 95-105 psi.
My hitachi nr83a nailer cycles one time when the air is attached. After the initial cyle the nailer operates normally.How do I repair it?
This is not a common problem for your nailer. Indicates a small leak in air path from triggering valve to head cap assembly. Assuming that there are no external air leaks, I would clean and lube the cylinder. Try to smooth all the fine scratches that you see on the cylinder where orings make contact. I use very fine sandpaper and turn the cylinder with a drill attachment. (you can be creative with an attachment, like a round piece of wood 2-3 inches in length that fits snugly into the cylinder find center and screw in a 1/4 in diameter screw, cut off head of screw.) Place your homemade attachment onto drill and slip into cylinder, the wood attachment will not damage the cylinder. I use a variable speed drill and turn slowly while I hold a strip of sandpaper against scratched area. Just a light even sanding is all that is needed. If not too scratched just leave as is. Replace oring number 877316 for cylinder plate (outer) and 877327 packing and lube with white grease. You do not have to replace any other orings unless they look damaged. If you replace all the orings, the cylinder will be too tight and my not work at all. Make sure that the three bolts on top of head are tight (no need to remove them, just make sure they are tight). Good luck.
Hitachi nr83a leaks air at new g.asket between head cap and body. screws are tight
If its constant leaking inside the nailer (not between cap and body to outside feeling an airstream in front or on one side )then there is an problem between top seals VALVE and seals o-rings on top of the piston cilinder the parts on the top of the cilinder Seals and in the top in high priority must all be replaced because of the building up heat overtime the gaskets seals and o-rings are getting hot and hardened out over time there are only separate parts selled one by one to get I have not seen hitachi gasket/o-ring kits for nailers there where only complete kits for the older range of demolition hammers , but in the new models not anymore outside the States m,aybe but in Europe not. replacing the piston bumper could sometimes help extra because of the little height difference of the cillinder .
If leaking between cap and body with a palpable airstream and before the seal was closed tight , retapping the treaths some greater in the magnesium body and place helicoils inside it could be bad treath in one of them , it must put firmly fixed that will not fasten enough that was with the Brand Dutack Pro a high priority problem for a few years ago exact the same a few years now its modificated and that problem is gone.
Hitachi NR83A 3 1 4 34 Full Head Nailer Parts
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