Question about Hitachi NR90GC 3 1/2" Gas Powered Clipped Head Framing Nailer

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My hitachi NR90GC nail gun wont hold a charge in the batteries doesn't matter how long i leave them on charge

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One of my batteries is the same, it used to fire a couple of nails then flash red. Putting it onto the charger it would charge for a couple of seconds then turn off.
I thought it had blown a cell and re-celled it with new NIMH cells but it turns out it is the thermistor in the top of the battery that has failled (the silver rectangle in the top of the battery when you take the case off) this tells the charger to turn off when the pack gets hot.
You can probably get one from an electronics store and replace it, but my solution was to charge it from a Dewalt charger instead which uses a different cut off mechanism, just check the polarities on both the charger and hitachi pack BEFORE you connect up.
Hope this helps

Posted on Aug 05, 2010

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Check your battery with a volt meter, also your charger may be bad

Posted on Feb 16, 2010

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Posted on Jan 02, 2017

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SOURCE: Can I use paslode roundrive nails in a Hitachi NR90GC Gas Nailer

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

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SOURCE: hitachi nail gun,piston/nail push rod

You have one or more worn o-rings in the head of the gun. They direct the air to the proper parts of the gun to first drive the nail then to return the driver to the top of the gun for the next nail. Depending on the manufacturer and your model number, some companies make kits to replace the o-rings (always replace all of them). For some companies you have to get a breakdown of the gun and order each o-ring seperately.

Posted on Oct 25, 2010

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1 Answer

My hitachi nr 90 gc nailer was always slow to fire a nail with about a second delay between pulling the trigger and firing the nail. now however the gun will only fire a nail once in about 20 attempts, and...


Trigger may be dirty, as an electrical switch the contacts can be intermittent. Also check to see if the safety plunger is set to correct depth and moving freely. Dirt can build up here......

Feb 14, 2010 | Hitachi NR90GC 3 1/2" Gas Powered Clipped...

1 Answer

My hitachi nailer wont fire


Start with the basics:
First check that the butane (or whatever gas is used) canister is full. If empty, put in a new one.

Second check to make sure your battery is fully charged to be able to fire the spark to work the nail gun. If not get the battery charged and/or replaced as needed.

Third make sure all of the safeties are working properly and that you have them engaged to the piece of wood you are nailing when you try the trigger.

If beyond that it does not work it could be a bad trigger, a bad safety switch, or even a bad connection from the battery to the device.

Nov 01, 2009 | Hitachi NR90GC 3 1/2" Gas Powered Clipped...

1 Answer

Can I use paslode roundrive nails in a Hitachi NR90GC Gas Nailer


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.

Oct 27, 2009 | Hitachi Tools & Hardware - Others

1 Answer

Fires a nail and then does,nt very irregular.


i have two hitachi guns and had a problem with both. they worked fine then stopped working after about a year. i got a new trigger wiring from www.powertoolspares.com for about £30 and fitted it myself and their both going great. must be a problem with micro switches as theres two on the wiring loom. one guns a nr90gc and the others the newer nr90gc2 but most parts are the same in both guns.

Aug 11, 2009 | Hitachi NR90GC 3 1/2" Gas Powered Clipped...

1 Answer

Were can i buy new one


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

Apr 15, 2009 | Hitachi NR90GR Cordless Round Head Gas...

2 Answers

Hitachi Framing Gun Not Firing - Bad Battery?


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

Sep 28, 2008 | Hitachi NR90GR Cordless Round Head Gas...

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