Question about Hitachi Air Tools & Compressors

1 Answer

Why does my Hitachi nv45ab gun double fire nails?

One depression of the trigger causes two nails to fire in succession.

Posted by on

  • lips0 Jan 25, 2013

    I appears that the pushing lever must be perfectly vertical for the gun to fire correctly. If the gun is tilted slightly, it double fires a nail. Has anyone ever had a problem with a worn pushing lever of an NV45AB?

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Hitachi Master
  • 1,383 Answers

This gun should be bump-fired only. Do not place the gun on the work and press trigger. Make sure that the safety spring is in place and has good tension. The spring helps to push the foot off the trigger so that it fires once. You could also adjust the screw that pushes on the firing valve. Turn in or out several turns till head of nail is correct when bump firing then lock the nut. The safety foot fits rather loose on the gun and should still work ok but can get so loose that it falls off the nose. Good luck

Posted on Jan 31, 2013

3 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 66 Answers

SOURCE: hitachi nail gun nr90ad leaks from trigger when

The nail gun should have came with some lubricating oil. A couple of drops should be installed where you connect the air hose to the nail gun every time you use your nail gun (or per the manufactures specifications) This helps lubricate all the internal o-rings. You may have to put a few drops in and use the gun a bit to get it to seal up. If it still doesn't after that, it may need the o-rings replaced.

Posted on Jan 20, 2010

  • 1244 Answers

SOURCE: Hitachi NV45AB coil nail gun is leaking air from

the top!! o-ring inside of thr top plate is bad you need to remove the plate /dissasemble and replace the o-ring

Posted on Jan 21, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My Hitachi NV45AB is leaking air from the trigger air valve. The gun still works if I just keep the trigger depressed and just smack the tip into the shingle.


Remove the 3mm roll pin holding the trigger in place and set aside the trigger plunger (white plastic plunger should have an oring on groove). Remove the fitting that holds the trigger plunger and replace vinyl ball #875645 or check for debris under ball. Good luck with your repair.

Apr 19, 2013 | Hitachi NV45AB2 Roofing Coil Nailer

2 Answers

Nv45ab won't advance nails


The allen screw/s that you mention are there to plug holes where automatic equipment would normally connect (such as automatic nailing machines) . This is only a plug and should not be driven in too far. I have also seen allen screws installed in the head to repair small crack/s.

Jan 22, 2013 | Hitachi Air Tools & Compressors

1 Answer

Nail gun problem


This is a bottom fire tool. (NV83A2) You need to hold the trigger down and then as you place the nailer to the wood the safety will depress and it will fire once. This is usually done in one, swift action. If you do this in the opposite way by placing the tool to the wood and then pulling the trigger they often will double fire.

Jul 05, 2012 | Nailers Hitachi Nv83a2 3 14" Coil Framing...

1 Answer

Hitachi NR83AA shoots two nails on one pull of the trigger?


Best practice is to bump fire the gun to prevent double fire. Do not place the gun on the work and pull the trigger. This takes practice while using at an angle. Works better if the nose piece has rather sharp points to help nose to stay in postion while you bump. With trigger depressed, practice without nails bumping/hitting wood at different angles untill you can bump hit at the spot that you need the fastener. If the gun double fires while bump-firing, most likely all the safety/trip parts are worn/loose. Not expensive to replace. Good luck.

Jul 05, 2012 | Air Tools & Compressors

1 Answer

NR90AE Nails jammed how to remove


New user will jam the gun/ nails because gun was most likely not bump fired. Placing the gun then depressing trigger will usually cause double fire in the hands of new user. New user should practice on scrap lumber bump firing at many angles till they get the idea; or give them a training period with a nailer that has a single shot trigger (they may develop bad habits with single shot however).

Nov 14, 2011 | Hitachi NR90AE Full Round Head Framing...

1 Answer

How to adjust double shot for Hitachi nail gun


The condition of the driver oring is an indication of wear of all the other orings in the gun. Remove the nails and lightly tap the nose against piece of wood. If the driver drops to bottom of cylinder the oring is worn out and time for oring kit. Hitachi nailers are sensitive and will double fire if placing the foot against work then depressing trigger. Adjust the depth thumb screw several turns either direction then depress trigger and quickly bump gun against work. Good luck with your repair.

May 03, 2011 | Hitachi NR83A2 Framing Nailer Full Head...

1 Answer

Fires 2 & 3 nails every so often.


Most all nail guns can be converted to single fire, however, usually parts must be changed. Some brands have two positions on the trigger, others have a button position near the trigger to accomplish same. Check with dealer or email your gun model # and I will explain your to fix. For now you can replace the spring on the safety with one slightly stiffer. Also try nailing with trigger depressed and quickly bump the gun to fire, this method usually works better than placing the gun in position then firing. Good luck with your repair.

Jun 24, 2010 | Hitachi 3 - 1/2" Full Roundhead Framing...

1 Answer

Nail gun- double feed


Nail guns either have a switch or a seperate trigger assembly for two options - automatic, or 'bump' fire, and sequential fire. Sequential firing may be best for you since the nose must be fully depressed and the trigger pulled for each nail.

If you're stuck with bump firing, practice your technique. Double fires often occur when the workpiece bounces back into the nose of the gun; learn to 'bounce' the gun off the material to avoid this second contact.

If you're getting double fires in sequential mode, the problem could be more serious. I keep a can of aerosol silicone lubricant on hand to clean and lubricate the feed mechanism and magazine. Make sure your tool is clean and lubricated before each use, including the 3-5 drops on the air coupling.

Check that your air pressure is not set too high. Overdriving nails reduces their effectiveness and can cause tool malfunction.

This problem could also be caused by worn out O-rings or other parts within the tool. If you're not comfortable servicing the tool yourself, take it in for repair/maintenance work.

Another important thing to remember: With tools like this, you get what you pay for. A cheap nailgun will never function as well as a quality nailgun.

Oct 14, 2009 | Tools & Hardware - Others

1 Answer

Nail gun double fires


There is one main part that can be the cause of the problem.

The trigger. Check to see if there is anything out of the ordinary with this. There should be some moving components attached to the trigger itself. Is any part of the trigger touching the button in the body of the gun when safety is not depressed. If the lever on the trigger is pushing on the button, even a little bit, It will allow the gun to fire again and again.

Mar 12, 2009 | Air Tools & Compressors

Not finding what you are looking for?
Air Tools & Compressors Logo

Related Topics:

200 people viewed this question

Ask a Question

Usually answered in minutes!

Top Hitachi Air Tools & Compressors Experts

John Trevino

Level 3 Expert

1383 Answers

Jim Thurston

Level 3 Expert

670 Answers

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

Are you a Hitachi Air Tool and Compressor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...