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Hitachi NV45AB won't advance nails

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This problem could be caused by the head gasket fliped the wrong way not sealing small hole in the body. Also the head valve gasket (small round gasket between headvalve and head) could be place with vent hole mis-aligned. Check these two items and post again.

Posted on Jan 31, 2013

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kb8dns
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SOURCE: my hitachi nr 90 gc nailer was always slow to fire

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......

Posted on Feb 14, 2010

  • 15 Answers

SOURCE: HOw does one load the nailer? Purchased the

You put a couple of drops of oil where you connect your hose. In the air inlet hole.

Posted on Jan 23, 2011

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My hitachi nail gun NV 50AA will fire, but won't advance the nails on a regular basis


NV50 nailer is very difficult to repair due to complicated feeder /feeder spring / feeder retainer pin design. You most likely need to replace the orings on the feeder piston. Problem is that you must remove the feed pin/ spring to get the piston out. If you are going to attempt to replace the orings, study how the pin is installed otherwise you will make it worse. Order new springs (2 different springs ) and install them when you are going back together. Good luck

Mar 03, 2013 | Tools & Hardware - Others

1 Answer

Why does my Hitachi nv45ab gun double fire nails?


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

Jan 23, 2013 | Hitachi Air Tools & Compressors

1 Answer

Why won't feed plunger advance nails?


The two hex head screws on the very top of the head hold the air deflector and attach to the headvalve (the part inside the head with rubber coating, this headvalve has a gasket under that should be check for proper alignment ). Other small screws that look like set screw are only plugs that are removed to install auto control hoses in factory work. These are only plugs so just put them in a few turns with locktite.

Jan 23, 2013 | Hitachi Tools & Hardware - Others

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

2 Answers

I have a porter cable roofing nailer model # RN175 that does not advance the nails everytime what causes this?


Some causes, in order of probability:
Roofing nailers get a lot of tar build up on them, especially around the nose safety and nail feed pawl area. Cleaning off this buildup will usually take care of most problems with roofing nailers.
On the side of the gun away from the side you load the nails on there is a small cylinder with a piston inside that attaches to the feeder pawl. If air isn't getting to the piston or the piston's o-ring or spring is damaged, it won't cycle properly to advance the nails.
If the driver doesn't retract fully, the next nail won't be able to advance properly for the next shot. This can be caused by o-rings in the head that are worn or out of their proper place.

Oct 06, 2012 | Air Tools & Compressors

1 Answer

My Hitachi nv65ah nail gun won't set nails into 3/4 trim. I have played with the turn/screw set adjustment and it is set for the deepest setting. This gun was purchased second hand off e-bay but


If every nail is stopping at the exact same height, a likely reason is the tip of the driver is broken off so it's not long enought to drive the nails all the way to flush. If the height of the nails is slightly different you may have worn or broken o-ring(s) inside the gun and air is leaking around the driver's piston or elsewhere in the gun so that the driver isn't getting full pressure. You can take the gun apart and inspect the o-rings. If you push the driver all the way down the tip should come flush or slightly past the end of the nose piece (not the safety tip). Parts are easy to find online or at a service center if you have one nearby.

Mar 10, 2012 | Hitachi NV65AH 212Inch Coil Siding Nailer

1 Answer

Bostitch RN46-1 roof nailer won't advance nails into the piston chamber. After loading the nail coil, the first nail fires fine, but the next won't advance. Please help. Thanks!


check the height of the magazine, but I think that you have a problem with the feed piston or there is a spring on the feed pawl that might be broke. Unload the nails and dry fire the tool with the door open observing the piston movement. It should "SNAP" back and forth if it does unplug the air and check to see if the spring that applies pressure to the pawl is broken or missing. I am going to guess the piston. If this tool has not been serviced in a while the asphalt tends to jam up the mechanisms. Let me know if you need more assistance.

Jun 12, 2011 | Tools & Hardware - Others

1 Answer

Nails were loaded backwards in my Hitachi nail gun. I can't unload them


Hi,

Sorry to hear, but it happens.....

You'll have to take the magazine apart and disassemble at least as far as the nail got. I'm giving you the webpage from toolpartsdirect.com for the schematic diagram and parts list to help you take everything apart, and of course, put back together again. http://d3cmirsdb60x3h.cloudfront.net/schematics/hitachi/nv83a2.big.pdf

Be sure to check all parts for damage, such as scarring on metal parts that might cause nails to stick later.

This site is a good place to get parts. Very fast delivery!

Hope this helps. If it does, I'd appreciate a 4 thumbs up. Thanks,

Handie Andie

Apr 24, 2011 | Nailers Hitachi Nv83a2 3 14" Coil Framing...

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