Hitachi NR90GR Cordless Round Head Gas Framing Nailer - Answered Questions & Fixed issues

I deal with more paslodes but think Its the same concept... Theres a button/switch on the trigger and back cap... the back cap one turns on the fan when the tool is depressed and the trigger one fires the spark to ignite the gas.Seems like the one on the back cap at the rear of the cylinder is stuck on.... or theres a problem with the circuit board

Check the spark plug for debris:
This manual: Item 11 left side of the page.
http://www.ereplacementparts.com/images/hitachi/NR90GR.pdf
Also make sure the spark plug wire is connected. You have all the indications that you shuold be able to fire... just no fire. That only leaves the spark plug item 11 and the wiring to the spark plug as suspected problem areas. Try removing the spark plug and testing it by grounding it to the chassis and pulling the trigger in a firing configuration. You may have gotten something in the plug during repairs or damaged the spark plug. You said you fixed a bad wire... given you have no spark is the repaired wired chaffing where you taped it and exposed and are of the spark plug wire to chassis ground? (
Thanks for choosing FixYa,
Kelly

lbrication

Hi,
Check for power to the fan... it should be 12vdc or whatever battery you have there...
either the wires did not get hooked up or soldered right or the short blew the board or a fuse somewhere...

heatman101

http://www.hitachipowertools.com/product/files/pneumatics/framing_nailers/NR90GRtoolcard.pdf

probably as long as they are the same nail BUT nailers are often very finnicky, probably by design, to encourage users to buy brand nails. would recommend NOT mixing brands with nailers and nails, from personal experience.

The link below will take you to (toolpartsdirect). This is where I purchase all my parts. They are quite handy because they sell most all popular brands/parts. Good Luck with your repair.
http://www.toolpartsdirect.com/cgi-bin/schematic.cgi/hitachi/NR90GC

Does the fan run and the light blink ont he nailer? I have one that I just bought. I put in the wrong type of nails and got one stuck. I had to take the front apart to clear it and now the damm thing wont fire. The green light blinks and the gas cartridge is basically full, even the fan does run after I release the push lever, but no fire???

I wonder if yours is the same as mine did fire for a couple nails first just fine then got jammed...

I will try to charge the battery more.... MAybe like yours it needs a strong charge for the spark...
Russ

Have you disconnected it from the air source and deep cleaned the nail gun? Sometimes even a tiny bit of dirt can block the rails the rod runs in. Once cleaned add a small amount of oil to the rod runners.

Test the volts and amps of the battery after charging, then try to shoot nails then test again after the blinking orange light. Battery is failing, they only have a certain number of recharge cycles and are also governed by age degradation. https://www.google.com/search?q=hitachi+nailer+battery+problems+and+solutions ..

It is possible that the oil you added to your Hitachi pin nailer isn't the correct type or that it has not been added in the correct amount. You should refer to the manual that came with the pin nailer to determine the correct oil type and the proper amount to use. If this does not resolve the issue, you may need to take your pin nailer to a technician for repair.

oil it --few drops especially in ram

LEARN TO USE THE SPELL CHECK FEATURE ON YOUR DEVICE . THERE IS NO SUCH THING AS A TRIGGER VALUE

I know nothing about these tools but Hitachi produce quality gear that isn't usually prone to intermittent faults. If I was faced with your situation I would check the power cord for internal breaks and check the internal connections and then investigate the functioning of any safety device that might be incorporated into the design - such a powerful tool would surely have safety built in or modern legislation would never allow them to be used on site. It was just a sort of gut feeling as it seems to be the built in safety that fails on many tools...

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.

The number one issue is bad fuel - even if you just purchased it, turn the cell over and check the date stamped on the bottom (often stores don't rotate their stock) If the fan starts when the nose is depressed but there is no spark then I would investigate the spark wire (make sure there are no nicks or cuts that may short to ground) and the ESU (Electronic Spark Unit).

Have you kept it properly oiled? It might be jammed because it's too dry.

Sounds like it's overly dry; needs oiling. Or there is something clogging the air lines or the air chamber inside the gun.

It sounds like you're producing difficulties yourself by attempting to solve this problem rather than seeking at why their can be a difficulty inside very first place https://www.fliptite.com/

Sorry we do not have that info.