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Hitachi nail gun

After using my nail gun for about 30mins, it stops firing out nails even though it fires as normal but no nails come out?

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If gun firing but nails not being driven could be one of two basic problems:
1. Nail jammed in magazine not allowing nails to move up.
Empty magazine, does follower move to top of magazine. Push gun against work piece, does fan motor start? Yes - jam in magazine or lock out bar not operating. (this would allow nail un to fire when out of nails)
2. Piston/driver not returning fully after firing, hence driver blade on top of next nail instead of behind it. This could again be caused by a jammed nail or just a nail head. Another case of not returning is the combustion chamber not making a good seal, check O rings on framer (they are steel rings on bradders) it may just need a good clean it is surprising how dirty they can get and if not cleaned a build up of dirt could break a seal. If not been cleaned for a long time worth checking piston rings, worst case scenario dirt builds up around the rings and stick fully in requiring new piston if the rings will not come out.
Nail guns work on the principle that an explosion pushes the piston driver forcing a nail into the work piece, after the explosion a vacuum is created and it is this that 'sucks' the piston/driver back up the cylinder.

Posted on Mar 28, 2014

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SOURCE: rapesco pro 140EL nail gun repair/ manual sought

Perhaps [url=http://www.tacwise.com/tools/view_prod.asp?code=21&back=2&type=1]This Link[/url] will get you going in the proper direction. It's not a schematic but it is the Tacwise homepage, hopefully they can be helpful to you.

Posted on Nov 05, 2008

  • 1383 Answers

SOURCE: bostich gun problem

If the piston/driver is broken, the gun will fire however nailing will not take place because the piston will jam in the cylinder. Sometimes the cylinder will also crack when the driver goes. If the piston is not broken but stays down, then check the cylinder check valve, worn lower bumper, bent driver or cracked cylinder. 18 guage nailer has a very thin driver which will easily bend or break. Parts however are not expensive.

Posted on Nov 25, 2008

  • 10865 Answers

SOURCE: Bostitch nail gun loss of pressure, won't fire nail

Hello. I can help you. The nail gun you have uses 18 gauge brads. I would use only original Bostitch 18 gauge.

The one MM of difference you mention is the reason why you do not have the pressure you did have. Get rid of those 31MM brads and get the 18 gauge. Home Depot carries the Bostitch line. I would go there or to homedepot.com

Posted on May 20, 2009

mrhappyface
  • 205 Answers

SOURCE: senco finish nailer not firing nails

firing pin called the driver is probably broken or needs new seals max air pressure 125 psi senco sells repair kits

Posted on May 29, 2009

  • 1 Answer

SOURCE: my paslode f 16 nail gun wont fire nails,new gas.

i found this happening to me and i oiled (light oil like 3 in 1) the driver (hammer) in the tip. that way it could retract and drive the next brad.

Posted on Aug 01, 2010

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1 Answer

Misfires new gun


If your using refills that have wire holding the nails together.
Check to see if bits of wire, debris is collecting in around the striking hammer. I switched to paper and never looked back. Must have gone through 5k worth of nails and rarely jams. Other things to check,
1. Check the striking hammer, make sure it is not bent or damaged.
2. Check air pressure, Low pressure can cause jamming, misfires.
3. If the tool needs pneumatic oil, 2-3 drops before you start good rule of thumb.
4. Check spring return. Sufficient pressure must be maintained or the nails will not feed properly. Misfires, incorrect feed, jamming etc.
I had a Hitachi brad nailer and it was horrible. Fire 1 brad nail would jam or misfire. Did everything I could think of nothing worked. Put it up, got a Rigid brad nailer and never looked at the Hitachi again. :)
Sometimes you just get a lemon! (PS I understand you have a framing nail gun. Brad nail gun above is used for an example)
Hope this helps

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1 Answer

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I presume the gun fires but no nail is ejected. A possibility is jammed nails in the magazine. Do you see a mark in your work piece of the driver blade? If yes then it is most likely jammed nails. If not could be a broken driver blade. If gun does not fire could be gas problem. (check in date, yes it does have a use by date), another cause of not firing is a broken wire particularly around trigger switch (switch is on trigger and hence the wires are flexing every time trigger is pressed). Another cause of not firing is a brass spring clip in handle assy if this breaks it stops the gun firing. Recently I have had more broken wires than anything else on these guns. Worth noting is that the Stanley Bostitch nail guns suffer the very same faults. Also note they are the same gun just different colours so you can fit Hitachi parts to the Bostitch and they are cheaper.

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make sure nails are loaded into the gun straight and correctly

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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

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1 Answer

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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.

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1 Answer

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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.

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1 Answer

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Your nailer is a very heavy duty nailer with very powerful blow. Works best with full size nails, not 2 inch range that are used in fencing, they are not spaced correctly for your gun (like hitting number 6 nail with sledge hammer). Open side door and remove the nails, leave the door open and dry fire gun against piece of rubber or old coiled air hose. The driver should return all the way up between shots and the feeder should move back then forward just as fast as the driver moves. If the feeder seems to move in slower motion then pull feed piston and replace orings and remove debris from feed cylinder. If the driver seems to stick out further than normal then lower bumper could be breaking up causing debris to enter feeder. Make sure that the driver is not bent and has a squared bottom, if rounded, remove and grind square. Finally adjust the depth control up or down slightly and bump fire for test, do not place gun on the work then fire. good luck

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1 Answer

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Hi,
It is common to see sparks. It is metal striking metal. Although, if it sparks alot. It could be a chipped driver blade and the nail would not drive all the way. Does your sink `em?

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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

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