My hitachi nailer is not firing. Sounds as if the

Hitachi nailers cycle the whole cylinder as the air valve when gun fires. The orings are most likely too tight around the cylinder. Easy to check. Remove the head and depress the cylinder with thumbs and cylinder should pop back up. If the cylinder is down pull it back up and reinstall head. The hack method to get the cylinder up is to rap the gun head against hard rubber pad (with head installed and air connected). If cylinder moves down then up, most likely head valve gaskets (under headvalve ) or headvalve itself or top of cylinder damaged. Good luck

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

Are you oiling your nail gun, it sounds like it's suffering from a lack of lubrication? It doesn't take much pneumatic tool oil but nail guns have to have it to work for any length of time. If you have been oiling the gun, you may have o-rings inside the gun that are worn, broken, or blown out of place. You can remove the head and check the condition of the o-rings and see if the inside of the gun is dirty. Clean the gun up and pay partucular attention to the o-rings on the bottom half of the cylinder and piston. When reassembling the gun be sure to grease the o-rings well. If you still have the same problem you may have to rebuild the gun by replaceing all the o-rings. Unfortunately Hitachi does not make rebuild kits so you have to go to their website on an aftermarket site like www.ereplacementparts.com and order each and every o-ring.

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

Place two drops of light oil into the gun at the air inlet, and re-connect the hose. Fire your gun several times into scrap wood.

Best regards, --W/D--

There are o-rings in the gun that route air around the cylinder to push the driver back up. One or more of these o-rings are worn or broken. You can get it fixed at a service center or you can go to sites like www.ereplacementparts.com to find a breakdown of your gun and order the parts. Unfortunately Hitachi doesn't make all in one repair kits and if you replace one, replace all of the o-rings.

Several of my customers are having the same problem here in New Mexico. If your air temperature is around 95 degrees or higher the plastic the caps are made of becomes too pliable to break off when the nail is fired through it. If you cool or freeze the cap roll, the caps will break off however this usually impractical. Get in the habit of moving the gun forward after firing a nail/cap to break the cap off. If you pull up or backwards you get a string of caps pulled out of the gun.

The NR83a has an adjustment just below the triggering plunger. It is a 6mm hex head bolt with a locking nut. Loosen the nut and adjust screw out several turns and re-test. Make adjustment as necessary. I have seen many of these gun without the locking nut which allows the bolt the adjust itself all the way down. AS parts wear this screw needs to be adjusted. The pushing lever and the plunger are wearing smaller/shorter, that is unless the locking nut was missing. Remove gun from air supply for safety when making adjustments. Good Luck an email if you have other qustion about this gun.

Stuart - this sounds like an air problem - you should perform the following test. With the air nailer close to the compressor you must monitor the airpressure after the gun fires. it sounds like the air is not gettting through diapram fast enough or there is a blockage in line. Blockage in line is not suspected for the following reason . It sounds like the air hose is holding enough air to fire 2-4 nails and then you must wait for the line to fill up again and then it fires ok. The pressure regulator out to the line controls this and they do fail. try this test and report back to me - I know I can solve this for you as I have extensive background in compressor and the like.

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