Question about Hitachi NR90GR Cordless Round Head Gas Framing Nailer

2 Answers

1 month old gun, wires that connect to the fan got pinched and severed after i cleaned it and shot a couple hundred more nailes, I resoldered wires but now no fan , gun wont fire...fresh battery and fuel

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  • pefcmf Dec 31, 2010

    how far down the fan wires is the resistor...and fyi.. the wires i soldered were on the trigger side so thats 7-8 inches long, not the 2 inch wires going into the fan itself

  • pefcmf Dec 31, 2010

    where is the board.. ij looking at a parts schematic and dont seeit listed...and is this something i can purchase and replace myself??

  • pefcmf Dec 31, 2010

    ah..i do see that on the schematic...ill check fan power then first

  • pefcmf Dec 31, 2010

    ok..wont be until monday unfortunately

  • pefcmf Jan 04, 2011

    Ok so I tapped into the fan wires on the female plug side that was not the side i soldered , took out the battery and then linked the leads to the battery and the fan powered on.

    I then conected to male side of the plug where the solder is and touched the actual solders I made,, plugged it in and the fan powered. I then tapped before the solders and the fan powered. SO I am assuming thern the controller is fried?

  • pefcmf Jan 04, 2011

    clarify your sentance please...

    It the nose trigger making when you push it down???

  • pefcmf Jan 04, 2011

    yes I know about the nose...but did not know of the switch in the nose..ill check that out asap...if I need he controller do you know off hand a good resource...or do I ust google the part number hitachi 885595

  • pefcmf Jan 05, 2011

    thaks for the time..ordering the controller..hope it solves it!!

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  • Hitachi Master
  • 43,501 Answers

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

Posted on Dec 31, 2010

  • 3 more comments 
  • D. Floyd Kolb
    D. Floyd Kolb Dec 31, 2010

    I think the technical name is "controller" ....



    But before I would do anything I would be checking for power to the fan...

  • D. Floyd Kolb
    D. Floyd Kolb Dec 31, 2010

    let me know how you make out...

  • D. Floyd Kolb
    D. Floyd Kolb Dec 31, 2010

    no problem...

  • D. Floyd Kolb
    D. Floyd Kolb Jan 04, 2011

    Obviously you have proven that the fan works... so the problem is in that the fan is not being energized... the controller seems to be the logical problem...is there anything else that you can see that would stop the flow??? It the nose trigger making when you push it down???

    That is the only other thing I can think of... but yes I figure you fried the control when the wires shorted...

  • D. Floyd Kolb
    D. Floyd Kolb Jan 04, 2011

    The nose of the gun needs to be pushed down before the gun can fire or there would be power to the fan... that is probably tied to the controller, but I'm not exactly sure how it is on that gun...I think there should be a switch that closes when the nose is pushed in...check that switch out also...

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  • Master
  • 10,319 Answers

If the time to solder the wires took too long the resistor may have gotton a little too hot and finally shorted out leaving the circuit open causing your problem. I would see if a tool rental shop will repair it for you. they are the best reasonable way of saving money repairing tools of this nature

Posted on Dec 30, 2010

  • frank thomas wilson
    frank thomas wilson Dec 31, 2010

    one month old? take it back for exchange instead of fighting with it if you did not change the exteriors cosmetics with the exception of common waer

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