Metabo HPT NV45AB2 Nailer Wont Fire Leaks Air Wont Feed Skips Nails Full Rebuild Process Hitachi

Рет қаралды 14,099

Жыл бұрын

Thank you for watching!! If we helped you out and you want to show your support - LIKE, SUBSCRIBE or give us a shout out below. If you saw something you didn't like leave your comment below as well, these things help us get better!
To see our recommended tools and products visit our Amazon shop at www.amazon.com/shop/individua...
We go over how to rebuild a Metabo HPT or Hitachi NV 45AB2 roofing nail gun.
This nail gun will many times leak air, wont sink nails, will skip nails, wont fire or wont feed when they need rebuilt.
These are one of the more complicated roofing nailers out there to rebuild because the entire cylinder moves when they fire. Most other nail guns use a stationary cylinder.
Make sure to follow the process closely, wear eye protection when shooting and make sure the end is pointed away from people and property when plugging in air for the first time after rebuild. Never load a fresh rebuild with nails until tested.
We use Reliability Provin KT-HA-104 to rebuild this. You can also use KT-HA-910 rebuild kit if you need the trigger plastic or additional bumper for the feeder. Most times this is unnecessary.
If you need the feeder spring the part number is 877761 (877-761) ( amzn.to/3Rcpud9 )
If you need the feeder pawl the part number is 883901 (883-901) ( amzn.to/3TfNRco )
These are the same as the Metabo HPT and Hitachi NV45AB2 also. The nailers are also basically the same as the NV45AB nailers and they made a similar NV45AE model for a while also.
You can buy a new replacement nailer at amzn.to/482utVb
Like and subscribe to see more helpful videos like this one! Save some money by doing it yourself!
#nailgun #smallenginerepair #hitachi #metabohpt #individualizedrepair #smallbusiness #diymaintenance
About Us:
My name is Martin. I have been repairing tools and small engines for almost 20 years. We operate a small engine repair shop in Illinois. We service / repair Briggs & Stratton, Kohler, Kawasaki, John Deere, Cub Cadet, Toro Tecumseh, Loncin, Honda, Craftsman, Husqvarna, MTD, Troy Bilt, Simplicity, John Deere, Exmark, LCT, Generac and many more brands. We work on riding mowers, walk behind mowers, snow blowers, zero turns, generators, pressure washers and much more. We normally repair about 3,000 pieces of equipment every year and look at many more that are beyond an affordable repair. Hopefully our videos will save you some money and give you the information you need to work on your own equipment or figure out the issue at hand.
Disclaimer: Links included in the description are affiliate links. As an Amazon associate we earn from qualifying purchases. There will be no additional charge to you for purchasing here. We appreciate your support, which allows us to continue to provide original content!
Please be careful when repairing any piece of equipment and follow all possible safety measures. This video is for entertainment purposes only.

Пікірлер: 76

@oO_SAVAGE_Oo Жыл бұрын

Ive taken so many of them apart without success. Glad to see someone finally put a video out. Awesome job!

@IndRepair Жыл бұрын

They are definitely not the easiest to rebuild but pretty simple if you know what's going on. Glad it is helping someone! Thanks for watching!

@tomfoolery9977 Жыл бұрын

YOU Defiantly have the best video on this. Thanx for the good content. Top Notch stuff.

@IndRepair Жыл бұрын

Appreciate that! Thanks for watching!

@rsz90182 Жыл бұрын

I have two and they still work. I oil them after every use.

@IndRepair Жыл бұрын

Amazing nail guns!

@Vo7tz Жыл бұрын

I do nail gun repairs myself , good video

@IndRepair Жыл бұрын

It seems to be a lost art anymore! Thanks for watching!

@Vo7tz Жыл бұрын

@@IndRepair you’re completely right about that , I’m looking to take over everywhere I can right now & pick up as many guns as I can. Wish me luck 🍀

@IndRepair Жыл бұрын

@@Vo7tz Good luck to you! I think you will do well!

@Vo7tz 5 ай бұрын

@@IndRepair 7 months later & im still doing them :)

@IndRepair 5 ай бұрын

@@Vo7tz Awesome news!! Hows it going? What brands mostly?

@brianbrown600 Жыл бұрын

Great video. Learned a lot. Where do I find the rebuild kits?

@IndRepair Жыл бұрын

OEM kits are obsolete but the o ring store has them available at www.theoringstore.com/store/index.php?main_page=product_info&products_id=7768

@funnyharleyman 27 күн бұрын

Anyone know the function of the small set screw below the trigger plunger? Nothing in the manual…

@IndRepair 27 күн бұрын

It controls at what depth the trigger safety is pushed

@marcorodriguez4436 2 ай бұрын

I have a metabo roofing nailer, it still nails but leaks air on the back of the head...could you help me out sir..

@IndRepair 2 ай бұрын

Probably something stuck in the rubber bumper up top or the orings need replaced

@philliprowell6588 Жыл бұрын

I THINK YOU KILLED IT

@IndRepair Жыл бұрын

Appreciate that! Thanks for watching!

@garyandrews4069 Жыл бұрын

Do you have a good source to purchase the silicone grease CHEMPLEX 710 or a good alternative. Amazon’s price is to expensive. Thanks for the video.

@IndRepair Жыл бұрын

@@garyandrews4069 We have been using Reliability Provin medium weight silicone grease even since they came out with it. It is part number CM-PP-017. I would call and see if you can order from them directly

@brianpaproski5839 Жыл бұрын

Nice, I wanted to make one for the same reason. Never got around to it! It wouldn’t have been as in depth as this either. Good job thanks! I didn’t know the reset thing at the end 😅

@IndRepair Жыл бұрын

@@brianpaproski5839 thanks for watching!!

@Roofer929pei 3 ай бұрын

Is the piston o-ring that comes in the kit the oversized one or did you get that seperate?

@IndRepair 3 ай бұрын

It comes in the reliability provin kit

@59whoule 7 ай бұрын

Could you possibly give me some advice? I have a Metabo NV45AB2 nailer that is firing without the nose being depressed. What would cause it? What do I need to do to fix it?

@IndRepair 7 ай бұрын

I would check out the trigger parts and the head parts. One or both these areas has bad o-rings/rubber/plastic parts

@saulr313 3 ай бұрын

Did video helped me replace the piston. I didnt know how to take it apart let alone putting it back but after putting everything back and plug it in, air started to come out by the trigger. Any idea? It wasnt doing it before

@IndRepair 3 ай бұрын

Likely needs reset or has a pinched o ring. I believe I show the reset procedure in the video

@saulr313 3 ай бұрын

Forgot to reset it, and now, after resetting it, it's working a whole lot better 👍

@IndRepair 3 ай бұрын

Awesome job!

@titlicker3229 10 ай бұрын

This video helped me abit but ultimately i failed with my nv65ah2 coil nailer. It was blowing air out exhaust but still fired nails, after reassembly it doesnt leak but wint fire, no air out exhaust just a pop out the trigger when pulled. If you come across that coil nailer itd be great if you made a video for that one. Ive got a $400 paper weight untill i figure it out

@IndRepair 10 ай бұрын

I would make sure the head and piston/cylinder are moving freely. Did you rebuild the trigger in that one or no? Could be a trigger problem on that gun with those symptoms also

@titlicker3229 10 ай бұрын

@@IndRepair i think i chowdered the exhaust valve to be honest it sticks down instead of springing in and out, gave up and droped it off at repair shop. Its my own fault for trying to remove exhaust with pliers...but thanks for the input video was great btw

@IndRepair 6 ай бұрын

I appreciate that!

@manuelcabrera2404 18 күн бұрын

Why does mine leak air from the back top side where the back protector piece is. A lot of air

@IndRepair 18 күн бұрын

Have you just rebuilt it? Did you reset it?

@manuelcabrera2404 17 күн бұрын

Yes i just rebuilt it i took it apart again and repeated the process shown in your video and works perfect thank you. Roofer from Georgia

@IndRepair 17 күн бұрын

@@manuelcabrera2404 Awesome job!

@timothycoulter2848 2 ай бұрын

Would a harbor freight roofing nailer be worth rebuilding? Thanks

@IndRepair 2 ай бұрын

No, they don't sell parts (at least every one I have called on)

@ryanwilliam129 16 күн бұрын

Hello. I am following along disassembling the gun. At 4.25 you said not to take out the driver assembly. I took it out too soon and it looks like that little plastic piece you mentioned is slightly broken. Do you have any suggestions for this? Thank you.

@ryanwilliam129 16 күн бұрын

Ok, update. 6.30 you showed that small plastic piece that would rip if you pull it out the back. I pulled it out the back and ripped it. Do you know where I can get this part? Thank you.

@IndRepair 16 күн бұрын

Find them on Amazon at amzn.to/3zCEa04

@ryanwilliam129 16 күн бұрын

@@IndRepair You rock man.

@ryanwilliam129 16 күн бұрын

@@IndRepair Any O rings that are in tact, am I fine to just place back in there? This way I'll just buy O rings that are visibly damaged. Let me know what you think.

@IndRepair 16 күн бұрын

@@ryanwilliam129 You can, better to do it all but will likely still work long as they are not too brittle or worn

@kevinduarte8617 5 ай бұрын

I did everything that you did in this video replaced all the o rings and gaskets and when I plug in the air hose, air just starts coming out from the exhaust. any idea what’s going on?

@IndRepair 5 ай бұрын

Many times it must be reset before using after a rebuild. Open door, push safety in and fire to reset. If that does not work you likely have a missing or pinched oring

@kevinduarte8617 5 ай бұрын

I tried that many times but didn’t work! I’m gonna take it apart one more time. Thank you anyway

@IndRepair 5 ай бұрын

Glad to help, let me know if it does not work. An OEM kit was used or an aftermarket? Many times the aftermarket kits are junk. The o-ring store has these kits available online for a great price

@jameshendrix8217 3 ай бұрын

@@kevinduarte8617 your cylinder is stuck down. get a rubber mallet and hit the top of the head under the cylinder springs back up and seals against the head valve.

@Ureelyreelysuck 5 ай бұрын

I replaced the gaskets when I replaced the o-rings. It works great but there's a steady leak from the gaskets. Both on the back and at the nose. What can I use to deal those gaskets?

@IndRepair 5 ай бұрын

Fast or slow leak? If fast likely oring pinched or needs reset. If you open the door, remove nails and push the tip in like you are going to shoot before hooking up the air the nailer will reset itself. Wear safety glasses.

@ryanwilliam129 11 күн бұрын

Just started my second gun repair on this type of nailer. I have a broken spring on the feeding mechanism. Where can I find one of these? Thank you.

@ryanwilliam129 11 күн бұрын

It’s the same feeder spring that was broken for you. Where can I buy a replacement feeder spring? Thank you.

@IndRepair 11 күн бұрын

@@ryanwilliam129 If you need the feeder spring the part number is 877761 (877-761) ( amzn.to/3Rcpud9 )

@ryanwilliam129 11 күн бұрын

@@IndRepair you really are awesome thank you

@IndRepair 11 күн бұрын

@@ryanwilliam129 glad to help!

@ryanwilliam129 11 күн бұрын

I have rebuilt the gun completely and I have a fast hard leak out the back of the gun. I feel the small cup stopper in the back mechanism you didn’t remove is leaking. I taped around it’s circumference the tighten it’s seal, and the leak slowed. I checked my other gun and that cup is also loose on it. Do you have any recommendations for this. As you have seen I’ve been working on this for a while. The quicker I can get these fixed is the sooner I’ll stop bothering you. Haha thanks for being there.

@AndresMedina-d7p 17 күн бұрын

I rebuilt mine and it’s not feeding nails😢😂

@IndRepair 17 күн бұрын

Did you get the lower o-ring replaced at the nose? This being bad will stop nail feeding

@barrysmith8193 Жыл бұрын

After watching this I’ve decided to just buy a new one. You may know what you are doing but the results of the tear down ended up a jumbled pile of parts that had no organization or logic of reassembly. Thanks anyway.

@IndRepair Жыл бұрын

Rebuilding is not for everyone thanks for watching!