Hitachi NR83A2 2" To 3 1/4" Full Head Framer with Depth of Drive - Answered Questions & Fixed issues
Bostitch F28ww nail gun does not cycle. There is
It sounds like your drive pin is jammed in the barrel. Can you see that moving freely? One of the two nails it fired may have lost a piece and is jammed in the barrel between the drive pin and barrel.
If this is the problem, You'll need to take a sturdy "drift pin punch" and hammer to drive the drive pin back down into the nailer. (I use an old drive pin from a discarded nailer as a drift pin punch)
Once the piston and drive pin are free again, the nailer should work fine.
Air leaks around trigger when it is squeezed
If you do not have a parts list for your gun, look that the page below for reference:
Reference #66 is the trigger plunger and #67 is the oring seal.
Leak when you press trigger is most likely due to bad or missing oring on the trigger plunger (white plastic pin under trigger). Remove the roll pin (3mm) holding the trigger and remove the plunger. Replace the oring as needed. If you would like to use generic part. Lowes oring #60 sold in the plumbing department (small package of 10 orings about $2) works fine. Good luck
Ive had this gun for
Remove the 4 screws and the head assembly. On this model the head valve is fixed but the cylinder moves and is spring loaded. Make sure that the cylinder moves slightly up and down freely.You may need to install a new o-ring kit if the old ones are worn or dried out.
New Hitachi NR83A2 with jambed
Removing jambed driver can be very difficult. I use an old hitachi driver with some metal removed at the tip to drive in the jambed piston. I grind the used driver slighty to allow for the jammed nails to pass the driver i am using for ram otherwise the old driver will jam up also. To protect head and cylinder from damage I remove them and set to side. Place body of gun on soft wood and hammer old driver blade with heavy copper or brass hammer. Good luck
Hitachi framing nailer wont retract. The pin wont
One or more of the rubber o-rings inside the gun are worn or broken. Air is leaking out of where it needs to go to push the driver back up. This is a good gun and worth rebuilding. Unfortunately Hitachi doesn't make rebuild kits for their guns, you have to have a breakdown and order each part you need seperately. If you do this, replace all of the o-rings, if one went bad the others are not far behind. If you take it to a repair shop make sure they repalce all the o-rings.
Hitachi nailer does not sink nails completely, no
You must have broken tip or out of adjustment. Easy to check. Remove nails, and push safety against scrap air hose or rubber to absorb blow and squeeze trigger. Piston will stay in the down position until your release safety (on some models you will need to pull back on feeder sligtly). While piston is down examine the end of the driver for nice squared off tip protruding about 1/4 inch beyond nose. If no tip or looks broken, replace driver. If tip looks complete, adjust for more depth. Good luck
Doesn't shoot. makes the noise, but no nail comes
I have had this problem myself, the only fix is a rebuild kit which you can pick up pretty cheap on ebay. the kit will consist of a bunch of seals and just pay attention to the way you take it apart and you will have no problems
I took my Hitachi NR83A
You do not need any special tools to assemble the pusher into the rails, however there is a trick to getting the spring in the proper position. I use a small pair of vice grips and a paper clip to hold the spring in position. The pusher slides into the rails easily. The back part of the pusher slides into the rails first. On the back part of the pusher there is a groove that accepts the spring, spring spool and pin. The pin will be in a vertical position and the spring will have the end tab with hole towards you. As you push this assembly into the rails you will loose sight of the spring end tab. You must hold the spring end tab at the bolt hole while you push in the assembly. This is done by bending the paperclip straight with very small hook on one end. Hook paperclip on spring tab hole and hold paperclip with vicegrip to position spring tab hole at bolt hole and push assembly all the way into rails untill it locks at rear or rails. This procedure can be varried with goal of holding spring tab at bolt hole. While holding tab in position insert rails into nose of gun and bolt rails. Just leave paper clip hook end there or pull out it does not matter. You are done. Good luck
The shaft pin on my hitachi nr83A2 strip nailer
Hitachi nr83 is one of the very few nailers that does not have the firing valve in the head. Instead the cylinder moves within the body of the gun. When the cylinder retracts it rests on the headcap (#877307). If the cylinder gets stuck in the down position, lightly taping on the head will sometimes reset against headcap. If the cylinder orings/contact surfaces are dry/dirty, the retraction spring will not have enough power to reset. Also, if the headcap rubber is cracked or worn the cylinder cannot make a good seal and leak as you describe. Remove the head being carefull not to tear the gasket and examine headcap and replace as necessary. If headcap looks good, pull cylinder and clean all surfaces where orings contact and remove scratches with fine sandpaper (400 grit). Lube orings with silicone paste lube available at Lowes in the plumbing department and/or swiming pool supplies area. Generally, you do not have to replace any orings unless they are broken or badly worn by grit. After you reinstall the cylinder, make sure that it moves up and down (travel is about 1/4"). Piston oring should fit snug enough to hold piston in place without dropping down the cylinder under its own weight. Parts available at www.toolpartsdirect.com
Good luck and post again if you have other questions.
Air blowing out exhaust
take a dead blow hammer and plug the air in and gently hit on the cap, you might have to TAP a couple times to seat the cylinder
Push lever won't push in
got it it is position 51, and it is part of the safety device to control the depth of the nail set. If it won't push in either piece could be bent what I would try and do it unplug the air and manually try and push to see what is stopping it and maybe tweaking it with a screwdriver to allow free travel, if not it might need to be replaced.
Hitachi NR83A2 nailer pushes next nail down
Are you using full round head nails?
The hissing indicates your O-rings are worn out and need to be replaced. This is not covered by warrenty and is common for all nail guns. Lots of kits are available on Ebay or your local Hitachi service center should stock them.
Hope this helps,
The comes out on its own from the back
Air coming from the back of the nailer is generall because of a main seal failure.
They are not generall hard to replace if you can find a replacement one.
Just remove the screws that hold the back on, and remove the seal, and install a new one in it's place.
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