Thank you so much for watching Horacio, we appreciate it! You can contact Hitachi/Metabo directly by clicking on the below link. There you will find their phone# as well as a field where you can enter your zipcode to find a service center or parts retailer close to you: www.metabo-hpt.com/us/main-navigation/find-a-retailer-service-center

Thank you for the watch! We're glad these videos can be of service. Welp, I would first disassemble the nailer to see what the item is that's bouncing around in there is. Remove the head cap and the cylinder to inspect it. It could be the hard rubber bumper in the bottom of the body of the nailer, which can break apart...especially if the gun is low on oil and you live in a dry environment. It could simply be that the bumper has cracked. Either way, you'll need to disassemble it to identify the piece, then go from there. Thanks again for the comment!

Is the head bumper still good? Or if your guns have dents in it that’s probably the problem.

Thanks for the question! Most likely the problem lies with one of the seals on the cylinder inside the main body of the gun. Typically, the cylinder seal (the wide rubber band-like seal) being damaged can cause this, or any number of seals on the cylinder. Also, check the head valve seals and o-rings. If there isn't s good seal between the top of the cylinder and the head valve (which is in the top cap of the nailer) you will get air leaking out of the head cap constantly. Many time, a good cleaning and re-lubricating of the o-rings will fix many problems with pneumatic nailers. Hope this helps get you started.

Thank you! As for the grease and o-ring lube, you can use really any o-ring grease for pneumatic nailers, no matter what the brand. Pneumatic oil can be added a few drops at a time before you use the nailer and again, any brand will do (whether it be Senco, Bostitch, Hitachi, Husky, etc.). As for the problem with the nailer firing without you depressing the nose down to the firing surface, that's probably an issue with the trigger system. Most likely the trigger stem inside the main body of the trigger is stuck. I would simply remove all of the o-rings in the trigger stem and system, re-lube them, then re-install them. If you've never disassembled the nailer before, it may be a good idea to re-lube all of the o-rings in the nailer. Hope this helps!

Thank you Janet and glad to help! Yes, one reason it's bending the nails when it fires could be due to a bent driver blade. I would remove the top cap and the piston/driver to confirm it's not bent. If it looks good, it's possible the nails aren't feeding into the nose area of the gun like they should. It could be that the magazine that holds the nails is misaligned with the nose, where it butts up against the nose. Make sure the nails are in the magazine properly (and that the correct nails are being used...I know it seems obvious but it's worth mentioning) and that the magazine isn't bent so that the nails feed into the nose without any obstruction. I hope this helps!

Where I can buy a kit to repare the hitachi framing gun?

Typically this problem is caused by a bad Cylinder Seal. The seal on top of the Cylinder is probably worn or damaged so it won't allow a good seal with the Head Valve. This part is #13 on the breakdown for this nailer, which you can view by clicking on the below link: mastertoolrepair.com/pneumatic-finish-nailer-parts-nt65ma-p-1335401.html Typically an o-ring kit will fix these issues; replacing all o-rings in the body of the nailer is a good idea if the tool is more than a few years old.

I would look to see if the cylinder ring check valve (big rubber band), item 19 on this link is snapped. mastertoolrepair.com/pneumatic-framing-nailer-parts-nr83a2-p-3857.html

that cylinder ring and everything on the top end looks looks normal but i'll replace it and all the o rings. anything on the bottom that could cause the problem? the piston drive penetrates wood but won't retract enough to let the next nail load. no leaky air sounds. thanks for the help.

Has the driver started to unscrew from the actual piston? Some of these piston/drivers had a tendency to unthread from the piston. Also, make sure there isn't an obstruction or the air deflector (#2) isn't bent down not allowing enough air to escape from the nailer.

i'll replace all the o rings from the kit and see if that fixes it. i'm in southern mexico and the parts will be here in about 4 or 5 days. tenx for taking the time to help.

Glad to help! Typically this is caused by a damaged Cylinder Seal, which is the rubber seal around the cylinder inside the body of the nailer. I would remove the top Cap and the Cylinder to inspect all seals and o-rings, as well as the rubber bumper at the bottom of the nailer to confirm it's intact. Many times, however, it's just the main Cylinder Seal that's damaged which causes a lot of air to escape from the nose of the nailer.

@@MasterToolRepair yup. Got it thank you

@@jaguon4619 that's why I'm here. When I press the safety so I can fire a nail, the air just rushes out.

I don't have an installation guide for this nailer, but you can download a detailed parts breakdown of this nailer by clicking on the below link: www.metabo-hpt.com/docs/default-source/default-document-library/nr90ad(s)_e3_bd.pdf?sfvrsn=c5b62c66_0 If you need more detailed assistance, I would give an Hitachi service rep a call at 800-706-7337.

Thanks for the question, Tom! The NR83A nailer has a 3/8" female NPT fitting where your plug would thread into. You could have a 1/4" (most common) or 3/8" (less common) quick connect fitting on your air hose, so it really just depends on the size of the quick connect fitting on the end of your air hose. Both the 1/4" and 3/8" male plugs are available at any hardware store or where nailers are sold, just make sure you get one with a 3/8" male NPT thread that will install into the nailer. It wouldn't hurt to install an o-ring kit in the nailer either, as this is almost always required if the nailer has been stored for any period of time or if you're not sure about the condition. I hope this helps.

@@MasterToolRepair Thanks so much for your reply! Just to be clear on what I need: At the bottom of the aluminum handle of my NR-83A where the pneumatic hose would attach, there's a threaded hole. The diameter of this hole in the aluminum handle appears to be 5/8". What I suspect I need is some kind of reducer/adapter fitting that will make this 5/8" hole smaller so I can screw in a standard pneumatic quick connect fitting. The output end of this pneumatic fitting (which I already have) is 1/4" like you mentioned. I hope I am being clear on this and you know what I need. Thanks very much for your help and advice.

@@THOMMGB Glad to help if I can! If it's an NR83A Hitachi nailer, the female thread in the handle will be 3/8" FPT. It'll measure 5/8" but it actually accepts a 3/8" male NPT plug. It can be confusing because when we say 3/8" MPT, that actually means the OUTSIDE diameter of the thread is 5/8". But, you subtract 1/4" from the O.D. to arrive at 3/8" MPT. So, as long as you find a 3/8" MPT male plug that should thread right into the nailer. Hope this helps!

@@MasterToolRepair Hi Gil, Thanks so much for the quick reply! Yes, that sizing information does help me a lot. When I go to buy this 3/8" NPT fitting, I'll have my NR83A with me just to make sure. I'm guessing it should not be a problem to find a 3/8" NPT with a 1/4" male to connect my air hose to, correct?

@@THOMMGB You're welcome! Correct, it should be very easy to find that fitting as it's the most common size used for your application. Any retailer who sells standard size couplers and plugs for pneumatic nail guns should stock it.

Thank you for the comment Samuel. It could be that one of the trigger valves or hard parts in the trigger are worn, which will cause the leak. It's difficult to say without diagnosing it myself, but that might be the case. I would honestly contact a service rep at Hitachi/Metabo by clicking on the below link, as they can give you more detailed diagnostic information: www.metabo-hpt.com/ca/footer-navigation/contact-us

@@MasterToolRepair Its funny because it was working fine then I changed some o rings in the cylinder and now its leaking. I hadn't done anything to the trigger at that stage. What causes air to pass through the plunger valve? it's only when half pressed so the oring on the valve must seal it?

@@samuelfarmer2098 What happens when you depress the trigger all the way?

@@samuelfarmer2098 Also, the cylinder has to slide up and down easily. Plenty of o-ring grease must be applied to this so that it seals against the cylinder cap. But this is usually when the trigger is not depressed.

@@MasterToolRepair it seals when fully depressed. I can use it fine but just leaks air as I press the trigger in.

The narrator's description of the check valve seal at 4:15 is incorrect. When the piston is driven downward, air is blown out holes in the cylinder behind the check valve. This air pressurizes the return air chamber. When the cylinder returns upward, the cylinder top is sealed off from compressed air. Air in the return chamber pushes the piston back up.

Thank you for the comment! Most nailers operate within 90 to 100 PSI, that's pretty standard across the board. There are some European and Asian models that are designed for high pressures of 200 PSI or so, but these HP tools are the minority. Most brad, finish, roofing and framing nailers operate within the 90 to 100 PSI range, as well as pneumatic staplers. If you regulate your unit within this range and your nailer/stapler doesn't cycle, it's most likely due to defective seals in the nailer itself. Make sure the correct type of nails are being used. Confirm the driver blade isn't bent or warped. Make sure the the nailer is clean internally and that all o-rings and seals are lubricated well. Also, make sure the regulated pressure gauge is accurate and isn't reading the pressure inaccurately. I hope this helps!

Thanks! I will try this. The nailer is a hitachi framing nailer. A guy at home depot told me that often, and especially when your compressor gets old, the gauge pressure usually reads low. He suggested taking the pressure to the higher portion of the range and try it again. If this does not work then yes, I guess I will need to take the thing apart.

That can be tricky. You can try taking some pliers to it but you'll need to make sure you put a thick rag over the cylinder so you don't damage it. The easier and safer way to remove it, however, is to take a rubber mallet and smack the body of the nailer. Newton's Law will force the cylinder to pop out with a few good smacks. Hope this helps!

Correct. This is actually a clone of the Hitachi NR83A framing nailer by Amigo. It's a great nailer at the price and almost every OEM Hitachi part will fit it.

Interchange Pro framing nailers use the Hitachi system and share many of the same parts.

Wee does the retractable spring goes for a nt65ma4

@@juancaraveo5059 The retactable spring that keeps tension on the nails goes in the magazine itself. If you search Google for "nt65ma4 parts" you will get a few websites in the search results that will give you a full breakdown of the nailer.

Thanks for the comment and request Justin. I'll request that we do a video on replacing the ribbon spring!

Thanks for the video, it's really good and informative.Can you please do a video on how to replace the magazine.Thanks again

I think we can@@George-rk6ed !

Yes, the nailer shown in the photo is the Air Locker version of the NR83A Hitachi nailer.

@@MasterToolRepair is the airlocker reliable?

@@slimey831 We think so, yes. We've used it and tested the nailer for months and it holds up as well as the Hitachi. And, nearly every Hitachi part is interchangeable with the Air Locker, to boot.

@@MasterToolRepair thanks ive seen them on ebay for a fraction of the price of a hitachi. My ridgid framing gun is starting to leak from the top

@@slimey831 The Air Locker version is certainly worth the $, in our opinion. I'd give it a shot!

Thank you for the watch and for the compliment, we appreciate it! I'll see if that's something we can do a video in the near future.

@@MasterToolRepair have u used the Hitachi NV 50AP. It leaks air and I can't seem to figure it out ...

@@ivanmartinez-ny6jn There are a few reasons it could be leaking. Where does it leak from exactly? Does it leak as soon as you hook up your air hose or only when you push the nose down to the surface, or only after you fire it? Thanks for the comment!

@@MasterToolRepair as soon as I plug the air hose and From the head cap.

@@ivanmartinez-ny6jn Thanks Ivan. If it leaks constantly from the head cap, you probably need to remove the cap and inspect the head valve o-rings and seals. Most likely there is some debris and build-up in the head which is now allowing the valve to move freely. The o-rings could also be dry-rotted or damaged. Next, check the seal on the very top of the cylinder, which is the seal that butts up against the bottom of the head valve. If the seal is damaged, it won't have good contact against the head valve and the nailer will constantly leak. I hope this helps to start!

he doesnt list the name and that little rubber piece broke in mine