20 Most Recent Hitachi NV75AG Coil Siding - Framing Nailer Questions & Answers

Go to the link below and enter the model number (NV75AG). This will get you to the parts breakdown page that also has a complete diagram of the gun. This will guide you on the repair. Since you don't indicate what the problem is, further guidance is not possible. Feel free to post any additional questions here.

Thanks,
Dan

Link: http://www.ereplacementparts.com/hitachi-parts-c-7927.html?gclid=CM-H3Mi_1KMCFZJd5QodaUCSuw

You did not described if there is piston movement when you squeeze the trigger or push outlet into the material. If there is piston movement but it is too weak to push the nail, insufficient air supply is first obvious reason.

Eliminate insufficient air pressure or volume supplied to the piece. Air pressure supplied should be between 70psi to 120psi (4.9bar to 8.3bar), air hose should be at least 7mm internal diameter.

If air supply was eliminated, disconnect air supply and check if piston is not locket in one position, you described that you done some maintenance on the machine. I assume therefore that you will know how to check piston for movement, if there is some restrain, you need to find what is causing it and remove obstruction.

As you put gun together, do not forget to lightly oil all assembly surfaces with compressor oil.

This is very good gun and should serve you for many years to come, we use these for last about 8 years rather haevily without any problem (except aprentices...), hope you will have as good service from yours.

Please send note what was the reason, and how did you solved it.

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

This is the Cars and Trucks section of Fixya. You might get more answers listing in another area of Fixya which more closely matches your device.All things considered, maybe apply air pressure and stick the unit under water in a utility sink or big wash tub. Air leaks would bubble like a hole in a tire tube.

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.

Check the date code on the bottom of your fuel - it doesn't matter if it feels full or that you just bought it, many stores don't rotate their stock. The #1 issue with these is bad fuel.

just wondering if you are putting enough down pressure on it before you pull the trigger.?

1. Have you adjusted the air pressure to at least 100 PSI? 2. Have you cleaned and lubricated the gun per manufacturer's instructions? 3. Are you driving nails into hard wood (oak, walnut, etc.)? Some guns are simply not powerful enough to handle extremely hard woods.

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.