Thank you for taking the time to make this video. Just diagnosed/repaired second-hand Bostitch nailer just in time! Couldn't have done it without your help.
Thanks for the vid. Had a brand new Ridgid 16 p nailer, was sticking and wouldn't reset. Only used to build a deck and a shed. Didn't need to replace any o rings but took apart, wiped down (maybe had too much oil) reassembled and worked. Tip when reassembling make sure to push the piston head all the way down the cylinder otherwise air can't recon press it and will just leak. Works like a charm now.
Great vid Im the tool tech for a big box store that has a rental department they started a program 3yrs ago where we will fix ur stuff LOL. Im good on small engines some electrical but nailers I usually send off cause now I have to fix store and customer stuff with no parts on hand and no time to guess ,this really helps , but the ones i usually do are always trigger valves.
Wanted to know if you were able to get the nail gun in the video working? I have the same gun that I am working on now. I am satisfied I have a leaking head valve seal. I did some research and found the head valve has been changed from a single o-ring to a double o-ring style. I ordered the updated head valve and a new cap. Was not sure if the new style head valve would work in the original cap. Just curious if you might have come across this.
Is there way to get info on parts for a store brand nailer from OSH Orchard Supply Hardware that went out of business? I really like the fix it. During the meantime I purchased a new Husky roofing nailer from Home Depot. The instruction on that one seems very strange and dangerous. Will try it in the next few days.
Thank you Jeff, we appreciate this compliment. We're in it for the long haul. We're a small business and started out in a garage repairing local customer's equipment. It feels good to help answer people's questions and get their equipment working again, so they can get back to work. This is just an extension of those days! We can't answer every question wisely but we do try. Stay safe!
Great video: I own a brand new DeWalt model DW45RN roofing coil nailer. Currently it's working but it cycles very slow. I shoot a nail, then I have to wait about 5 seconds for it to retract before I can shoot the next nail. Air pressure is set to 100 psi and I use 3in1 oil as the lubricant. There's no water in the system; what could be the problem? Thanks
Will this all apply to framing nail guns? I have a Max SN883RH3 SUPERFRAMER. Just hisses when I pullnthe trigger. Probably the best gun I've used over ghetto last 15 years till now, Internet seems void of specifics on repairing this gun.
Bostitch 15g finishing guns have a built in air-blower button. Many of those blowers leak badly even when brand new. Have you ever had to deal with this? I read somewhere that a factory defect installed a bunch of damaged O-rings.
I have a Central Pneumatic roofing nail gun, 93253. I watched the clip and took it apart. There are two green bumper parts that deteriorated. One is a dampener at the very back, the other is a external dampener on the outside of the piston cylinder. I can not find a place to buy replacement parts. Major spare part suppliers do not list Central Pneumatic, neither Harbor Freight. Any idea? I believe that this brand uses parts that are designed for another brand. 2022-11-22
You're welcome, and thank you for the comment Graham. Depending on who made the unit for Ridgid, it may be difficult to find parts for your nailer. What is the model number? For some reason, they're discontinuing many parts for multiple tool models. I couldn't say why this is the case, it could be because certain parts just don't move very quickly or there could be a supply problem.
Thanks for the question! For coil nailers, the problem is typically with the Feeder mechanism on the nose of the gun. As long as nothing obvious is the issue (like the wrong type of nails are being used, etc.) then most likely the Feeder Spring is damaged, which is not allowing the Feeder mechanism to operate and advance the nails into the Firing Chamber. I would remove the cover from the side of the Nose, then inspect the Feeder itself and all of the springs (I believe there are 2 or 3, depending on the model). Most likely this will be the issue. Also, it's a recommended to clean the Feeder very well with parts cleaner while you're in there because there is probably a lot of debris that's hindering the Feeder from operating. Good luck!
I have a hitachi coil siding gun and have air leaking out of the trigger and it won't fire. After watching your video I am assuming it is the trigger valve? Need a kit for that and how hard is it to repair this issue. Thanks in advance
What an excellent video! I have on problem not mentioned though. Since I bought it new my hitachi construction stapler sinks the nails half way down until I shoot it 100 or more times then it works like a champion... It's not my air hose or compressor...I've never fixed a nail gun, had dozens of them, but after seeing this video I see no need to buy a new gun every time my old one breaks!
David Sanders This may be due to dirt or grime in the cylinder, honestly. I would see if you can simply remove the head with head valve and remove the cylinder; it's pretty simple to disassemble. I'd clean it out, re-lube the o-rings and add your pneumatic tool oil, it should do the trick. Most of the time this happens because the components are not lubricated well enough. Make sure all of your o-rings and seals are in good shape when you disassemble. Oh, and thank you!
great video by the way.. I have a Bostitch 18 gauge bread maker model number sb-1850bn.. when I go to use it or does nothing but burst of air out of the exhaust port openings. opened it up but o rings look fine. are they bad or can u make a video/explain why it's not firing. note: as friend used it with a 16g set of nails not sure if that damaged something but does not seem to have a mail lodged.. thanks nick
Thanks, saved me sometime taking stuff apart I didn't need to. My 12 year old Hitachi narrow crown stapler was just blasting air out of the exhaust when air is connected. The whole plastic top valve is crumbling apart like its made of cheddar cheese. Seems like in an environment where it's constantly exposed to petroleum oil they would make it out of a plastic that doesn't deteriorate when exposed to petroleum oil 🙄
thank u for this video. from watching this video over n over when i had an issue, and taking the guns apart. i was able to learn how to repair hitachi guns and start making money doing it. you sir are great ! lol
I found the head valve in my Bostitch N75C basically broken from drying out i suspect. Just ordered a new one. I swear, if you bought every part in these guns, you'd spend a fortune. Thanks
I know I might not get an answer since your original post is over 7 years old but I still tried to post a question earlier. However, I think it failed. So, here it is again. I have a Craftsman 351-18306 crown staple air gun. It is dry firing. The piston / hammer only bounces off the lower stop and does not retract back up so the next staple is trapped. My air pressure is only 40 lbs. I couldn't find a repair kit but, I found an O-ring that seals the piston better. But, that didn't fix the problem. Do you have any other part / fix recommendation? I new at using air tools so don't clearly understand how the air is supposed to change from driving the piston down to then pull the piston back up. I'd really appreciate some explanation on this and some suggestions on what other part or parts might cause the dry fire problem. The piston / hammer assembly does move back up pretty easily when I manually pushed up. Now it has slightly more resistance after I put a new O-ring on the piston. But, something seems to cause the air to not return the piston back to the up position. I know air is supposed to return the piston to the top but, it just seems to me that a spring piston return to retract the piston / hammer back up might have been more reliable than relying on an air valve to change the air flow to push the piston back up.
Thanks for the post! The problem could be caused by many things. Is the driver retracting fully to allow the next fastener to be grabbed by the driver? This is the first thing that needs to be checked. Not if you push it up manually, but after firing, when you look into the magazine, is the driver still partially down to NOT allow the next fastener to be driven?
Mine had air leak out top exhaust and nothing happens when pull trigger. I replaced the cylinder seal after unjamming nails and it has worked great for months.
Any suggestions on why Grip Rite GRTCS250 coil siding nailer fires first nail but blade stays forward and next nail isn’t picked up. Gun is essentially new but I’m not the first owner. Any suggestions very welcome
Thanks man....I just scored a now classic Senco SFNII for 8 bucks....she shoots but has that upper blow by so I need to reseal her....great little refresher for me since I haven't seen the inside of a nailer for 23 years since I made the transition from pro to weekend warrior....
Glad this video could give some assistant, Mike. Most of the time, throwing in a seal kit is the best option, especially for older nailers. If you clean it out, install new o-rings and grease 'em up really well, the nailer should shoot beautifully (barring any hard parts being damaged). That SFNII is a tank of a nailer, excellent pick up!
@@MasterToolRepair yeah...sort of sentimental to me too...I learned to build cabinets on one...In my little hobby shop now I have a much newer 15 gauge senco (can't remember which model now) with teflon piston, etc that works excellently but the one I just picked up will be great as a back up or anytime I get a wild hair to do some arm curls in the shop...lol
I have a Campbell Hausfeld air framing nailer. Problem is when it shoots it inverts the nail head only just into the wood. Unsure where to start diagnosing. Advice?
I have two roofing nr46's that were working fine and now it seems the feeder Is not pulling the nails up. One looks like the feeder piston makes the feeder pop out to the side. is there a fix for this ?any help would be greet.looking online all over and can't find a solution.
My Bostich Framing nail gun stopped working, the piston doesn't retract. So, I purchased a rebuild kit and rebuilt the nail gun, and still does not retract the piston. What did I do wrong? ?
Hey good video. I always have issue with nail not loading back up after being fired. You mentioned the feeder piston O ring. Are these 2 orings in the bostitch rebuild kit ? RN 46 ?
They sure are! Reference numbers 36 and 38 are the feed piston o-rings and the OEM parts lists states these are included in the RN46-RK Rbld Kit: www.mastertoolrepair.com/for-rn46-rn46-rk-p-3837.html Good chance the problem lies there so I'd replace the o-rings first.
Bought a used bostich framing nailer and it works great. Only problem is will shoot a 2 3/8 nail fine but won't shoot a 3 1/8th. Seems the nails won't go into the tube to fire. Is there an adjustment to allow a longer nail.
I just did a complete O ring and trigger kit on a dewalt D51844 type 1 and I did not fix my problem. (Air leaking heavily out the nose) Any ideas what I could try? Thank you
Hey great video. My identical nailer as in this vid, leaking like crazy from trigger valve. After replacing the valve, the nailer no longer leaks, but will not shoot. It seems as though the trigger is not making contact with the valve. Also my piston firing ring did slide right down the cylinder and I pushed it back, it seems to be holding now. Still won't fire. Im wondering If I'm missing a part around the trigger?
Thanks for the comment and compliment James! I would say the safety trip arm is probably not hitting the trigger actuator. This is what allows the trigger to depress the trigger valve and fires the tool. Check to see if it's assembled incorrectly. The piston/driver sliding in the cylinder is not uncommon with age and continued use so replacing the piston ring could possibly help this.
I also have a porter cable FN250C finish nailer. It's a few years old but never used. When I push the nose down on my work piece and then pull the trigger the piston does not cycle and air releasesfrom the trigger. Took it apart and cleaned out the cylinder but still does the same thing. Any suggestions?
This sounds to me like you may have bad/damaged o-rings in the Head Valve; did you check all o-rings on the inside and outside of the Head Valve (inside the cap)? If they look like they're in good shape then I would remove the trigger valve & inspect these o-rings as well. It could be that one of the small o-rings on the trigger stem inside the valve needs replacing. Typically this happens due to grit and debris inside the nailer, or dry-rot due to insufficient lubrication. Many times just cleaning out the gun and re-lubing will solve this problem.
+Master Tool Repair not exactly sure how to complete remove the head. it didn't just come off like the one in your video. do I have to pry it out some?
It can be a bit difficult to remove but the top head Cap will come off. Once you remove the four head bolts I'd recommend taking a rubber mallet and tapping the side of the Head Cap until you dislodge it, then it will be easy to remove. BTW you can see a full breakdown of this nailer for reference by clicking on the below link: www.mastertoolrepair.com/pneumatic-finish-nailer-parts-type1-fn250c-p-61463.html
+Master Tool Repair well I think I found the problem. Two seals that are around the silver button of the trigger assembly but of course can't just get the seals and have to but the whole assembly.
It is true, Porter Cable simply doesn't offer them separately as it's only available in the $18 trigger kit; this is pretty typical. You can see if you can go to a Fastenal or similar outlet to find a match for the individual o-rings, good chance you can. Glad you found the problem parts though. Good luck!
Hi, I have a FN250SB nail gun with a nail wedged so the slide won't move. Several nails had gotten wedged in there and I got most of them out, but of course the last one broke off. Do you happen to have a video that shows how to take the magazine apart so I can get the broke piece of nail out.
We don't have a video that specifically shows how to disassemble the magazine, unfortunately, but the magazine does come apart. It can be a little tricky as there are quite a few parts to it (bolts, nuts, springs etc.). We do have a parts breakdown for this model nailer that may help, just click on the below link to view it: www.mastertoolrepair.com/pneumatic-finish-nailer-parts-type0-fn250sb-p-648599.html If you still need more assistance I'd highly recommend contacting a technical rep with Porter Cable. You can reach them by calling (888) 848-5175.
I have a bostitch n80cb that fires a nail whenever I put air to it. I have changed the trigger and it still does it. I was wondering if you had any tips? great video by the way.
Thanks for the question George. It would be helpful to know if it works properly after the initial plug-in fire or not at all. In 90% of cases it is the Trigger Valve that will cause this for sure, but if it is the trigger valve it will not function later. In rare cases, the outer o-rings on the head valve can be worn or degraded enough that it does not seal the initial burst of air properly upon plug-in and can make the head valve “pulse” once, but then will often work just fine until released and plugged in again.
''Great Video'' buddy, keep them coming. I have an issue where my gun doesn't fire as in your explained video. [How do I find out the (sin number) for ordering parts? And where does ones-self order parts for there air gun, and have it shipped personally to there home My gun is a Bostitch the side where loading coils drop away from the gun. I'm not sure where to find ordering info needed, if you don't have the box or packaging book or etc... Thanks is advice.
Thanks for the question. You have a Bostitch coil nailer. Is it a roofing or framing nailer? If you could send a picture of it to etrotman@mastertoolrepair.com maybe we can identify it and then show you the page where you can order parts.
Just rebuilt my SENCO Prodriver 35 with a complete overhaul OEM kit to fix a "driver fails to return" after fire problem. No joy. Is there a return air port that might be clogged or a particular O-ring I should be looking at? (Nice vid, BTW)
Since I don't have the nailer here to diagnose, I would honestly contact a service rep at Senco directly by calling them at 800-543-4596. Thanks for watching!
Great video. I have a little max CN450G coil gun - I have pulled the top off- the piston barely moves in the cylinder- the top o ring was stuck and stretched - I tried what you did in the video (hammer tap) to get the cylinder out but it didn't work. When I push the safety and pull the trigger it give a pssssh and thats it. Any thoughts?
Thanks for the compliment! The nailer may be a bit dry and the seals could have some dry-rot, not to mention grit and grime that makes its way into the nailer, so it can be difficult to remove the cylinder sometimes. I would keep tapping on the body of the gun with a rubber mallet until the cylinder dislodges, but you may need to put a shop towel over the top of the cylinder and take some vice grips to it to try and pull it out using this method. Just make sure to use a rag or towel over the cylinder so the vice grips don't damage the cylinder. Once you do remove it, you'll probably see that one or more of the outer cylinder seals is damaged or missing. Also, check the o-rings in the head valve. It most likely needs to be cleaned out thoroughly, a new o-ring kit installed and the gun lubricated with pneumatic tool oil. Hope this helps!
Got it! Thanks so much. Was really stuck in there. The whole gun was drowning in oil but that may have been me loading it up to try and get it working again. I will get an O ring kit and see how I go. Thanks again!
I have an older Bostitch 16 gauge staple gun, likely from about 2005. It is a Bostitch 650S4 model, lightly used and in good physical shape. I stopped working and had an exhaust cap leak at the head. Seal kits from Bostitch are no longer available, but I was able to find an aftermarket kit containing just the o-rings online. I took the unit apart, cleaned the unit, replaced 7 o-rings and assembled everything again. Plugged in an air hose, and the unit is working again, but now I have a leak at the bottom of the cast frame where the “hammer” comes through the bottom of the cast orange housing. It’s basically right near the top of the staple, close to the hammer (that strikes the staple. Basically a steady stream of air coming through this area. Not sure what has failed here. Any thoughts on what causes this? Thanks.
If the frame of the gun is cracked there’s nothing you can do. Air tools are very simple in design. They do not have a lot of parts to them. Any air leak is seal related or bent and worn internals of the gun
Have 2 Hitachi nv45ab2 guns both with nail skipping, I cleaned the feeder mechanism but haven't disassembled the feeder piston. I did notice when a nail is skipped the driver is still deployed and not fully retracted. I'm not sure if the reason the nail skipping is because the driver isn't fully retracted or the reason the driver isn't fully retracted due to the nail stopping the driver from fully retracting. Have you seen this before, I will be ordering an overhaul hit for this. The second gun does the same however when turning the gun upside down I can hear the driver slide down to the other end Good video, was hoping to hear any ideas on nail skipping.
Thanks for the question John. I would recommend taking the feed piston out and checking the o-rings, most likely these o-rings need to be replaced, and I would also replace the feeder spring while you're in there....that's a common problem. If the driver doesn't retract completely, however, this is indicative of a bad cylinder seal, which is the seal located on top of the cylinder that butts up against the head valve. Replacing these items along with all other common wear o-rings should take care of the problem, certainly.
Just got a used roofing nailer of someone, went to use it the same day and it worked for half a bundle of shingles, but it suddenly just stopped pushing nails in. A squeeze of the trigger would let air out, but there would be no nail shooting out. Checking if the coil was kinked but that wasn't the problem. Still not sure what's wrong it it, didn't look at it too much as we had other nailer so I just switched and went on with the day. Any chance you know what happened with it? It doesn't leak air anywhere. Maybe it's just not pulling the coil up to place the next nail in the barrel?
A couple of things could be going on here. One, I would take a look at your feeder piston on the side of the nose of the nailer. Take the plastic cover off and inspect the feeder piston o-ring and the feeder spring itself. Make sure nothing is damaged and that the o-rings still hold their shape and are lubricated. Next, I would take the head cap off and cylinder out. Check the cylinder seal and all o-rings on the cylinder. Also remove the plastic head valve from the head cap and inspect the o-ring on the outside and inside of the valve. These tend to flatten over time and lose their round shape which may not cause the head valve to seal well. It may also be that the plastic head valve is worn and needs to be replaced. Lastly, the feeder and internal body of the nailer may just need a very good cleaning. Roofing nailers get a lot of grime and grit built up on the hardware so it just may need a complete cleaning and all o-rings re-lubricated. Hope this helps!
Exhaust seal for pin that does not retract. Mmmmm okay going to check that out. Mine is a simple brad gun may not have seal rings in piston. Will check again .
If the nailer isn't shooting the nails straight into the wood, the driver itself is the issue. As long as the nails are installed properly and are being fed into the nose of the nailer properly, the issue has to be with the driver itself.Hopefully, it's not bent. Since it's a new nailer you may want to contact Bostitch directly or the outlet you purchased it from and have them either repair it or replace it under warranty.
@@MasterToolRepair It's still shooting quite a few of umm good..it shouldn't matter if they ain't BOSTITCH out of the Box?! but Thank You! (I've got this full box of Grip-Rite roofing nails and should it matter!)
@@foxyroxstar It shouldn't matter what brand the nails are, no. As long as the coil nails are the right type and gauge, you should be fine. Make sure the nails are correctly positioned in the magazine. But if the nails came with the nailer when you baought it new, they should work for you, and as long as you have the correct PSI going to your nailer. You may want to give Bostitch a call at 800-556-6696.
@@MasterToolRepair Now That IS a big help! You may want to give Bostitch a call at 800-556-6696! I didn't wanna start out with a Big Bang Theory..95psi! Thanks Again...(twas a "pet" account name but makes people laugh!)
Very helpful video sir! I have a question...im thinking of buying a hitachi roofing nailer for myself because thats what i use at work all the time and what most people around me say is the best. But, Is there really a significant difference from a $300 nail gun and a $150 nail gun? The answer is most likely obvious but i was hoping you could elaborate on that...and also, if you could mention your favorite nailer brand.
Hi Walter, some people prefer the Hitachi due to it's light weight, but others like the Bostitch due to how you load the nails. If you are using it every day, you will have a preference of your own. The Hitachi has less moving parts and seems to last longer, but there are many out there that prefer the ruggedness of the Bostitch nailer. To point out the obvious, yes, these brands' nailers are simply made better (and parts are readily available!).
I have one thats probably 15-20 years old but with very light use. When I push down on the tip and squeeze the trigger, it won't fire a nail, it just makes an air hiss.
I have a old Haubold staple gun it sounds like it fires when trigger is pulled but piston does not retract what would cause this ?And can I get parts for it if so where ?
I'm not familiar with that brand so I can't give specific advice, but usually this is caused by a faulty cylinder seal. There should be a seal on the top of the cylinder, inside the body of the nailer. If this is damaged, it won't form a tight seal with the head valve and your piston won't retract. I would disassemble it and inspect all of the cylinder seal and all other cylinder and head valve o-rings. Thanks for the comment!
Thanks for the tips. It's a rn 46 in nearly new condition. I'm now thinking it's possibly grime. I'll clean it out first.(where is the best place to get the o rings?)
Thanks for the video. I have a bostitch small nailer that I got at Christmas. I have only used it a dozen of times. It works great but I have a constant leaking of air out of the tip where the nail comes out. I use oil every time I use it. Maybe more oil?? Hard to believe I would need to replace an o ring this early in the game. Btw your voice sounds exactly like James Hetfield from Metallica.... lol
James Hetfield eh? I'll take it! Haven't got that one before but I dig Metallica :-) You wouldn't think the o-rings would need replacing, I agree. However, we have no idea of knowing how long the nailer was in the factory's warehouse (or sitting on the shelf at the retailer) before you purchased it, so it could be that the o-rings already started to dry-rot. It's not likely, but I wouldn't rule this out. Also, it depends on the climate, but if you oil it regularly this shouldn't be an issue either. Any leak from the nose comes from the outer diameter o-rings on the cylinder sleeve or cylinder ring/bulkhead ring. If any of them leak, it comes out of the nose. At rest, the tool only has pressure in the upper part of the tool. I would disassemble the nailer and inspect the seals and o-rings on the outside of the cylinder as you'll most likely find the problem there.
So, where would I get these O-ring kits? Specifically for a Blue-Point AT 5000 Impact gun. I got it for free, but everything leaks and has not much power...
James Justice Sorry for the long delay in this reply! Any o-ring kits for Blue Point pneumatic tools would have to be sourced from Snap-On directly as this is their proprietary brand.
Hello I have a MIII812CNCT issue, where driver does not retrack, and air simply blows out. Would you say the exhaust valve seals are the main culprit or the trigger? Any information is greatly appreciated. Thank you for your time. Ron
Thank you for the watch and for the comment! Most likely it's the BC1332 Seal, which you can find at the below link: www.amazon.com/BOSTITCH-BC1332-Seal-Valve/dp/B00XKSEDN4 This seal is inside the main chamber of the nailer at the bottom, and it's common for it to crack and damage. I would disassemble it to inspect this seal and I would probably start by replacing it. I hope this helps!
Hi bro nice video ,my question is i have the same nailer and my problem is that when i want to nail a shingle i only mark the shingle with the pistons head then i open the case where the coil nails go i push it and then it will work but if i don't do this it won't work i have no air leaks nor so , i would appreciate it if u can help me ,thanks
Thanks Juan! What you have is a very common problem with this Bostitch nailer. If the nailer fires without leaks but won't advance the nails through the nose, that's caused by the Feeder and/or Feeder Piston O-ring(s). If you take the side cover off of the nose you'll see the Feeder Piston. Most likely the small o-rings on the feed piston are torn up, which won't allow the piston to operate and the Feeder to actuate and advance the nails. Also, check the small springs in the feeder. Most of the time we find that there is just a ton of grit and gunk built up in the feeder and nose, so I would clean the nailer very well, re-lube all of the feeder o-rings and see if it works for you!
My Dewalt 15 gauge will only fire with the trigger removed leaving the trigger Valve in and hitting the button. Any suggestions? Almost like there's not enough trigger travel to hit the valve button.
Do you have a model number for your nailer? This will help me give more detail. But, it sounds like the safety mechanism is at fault here. When you push the nose against the surface medium, the safety mechanism should push against the trigger valve to fire the nailer. This may not be happening. I should be able to give more detail with a model number, however.
I have a fairly old (Purchased in 1991.) Bostitch N60FN that is not firing properly. When I pull the trigger it sounds like a short burst of air is releasing from the trigger area and that's it. Nothing else happens. I've replaced the trigger valve with a brand new lubricated kit. No change. The cavity where the trigger valve goes into seems very clean too. This finish nailer has sat idle for at least four years or more so I'm sure I have some brittle o-rings or seals somewhere. Any thoughts?
Thanks for the watch and question! Yes, I agree that you probably have dry-rotted o-rings and seals, especially since it sat for that long. I would replace all of the o-rings on the cylinder and head valve as well, and lube them up well. Once you do this it'll probably fire like new. Cleaning the hard internal parts then replacing the rest of the o-rings should fix it right up.
@@MrDoodsie56 You're welcome! I don't see a complete o-ring kit available for this older nailer I'm afraid, but there are individual o-rings available. You can find them on the Bostitch ServiceNet website by clicking on the below link: servicenet.bostitch.com/Products/Detail/N60FN
I have an SX 32 bostich air stapler I have replaced the trigger valve, and installed an O ring kit. Something is still wrong. As soon as I hook up the air hose the gun fires a staple. The piston does not retract, I have to remove the air hose to get the piston to retract. It fires without pressing the trigger or safety. Help
Thanks for responding, the air comes out of the trigger only when i press it to nail , and no nail comes out ,it feels like if the trigger needs more back space
Glad to help. The trigger valve itself is probably the problem, but you could also have head valve seals that are stuck. I would certainly remove the head cap and disassemble the entire nailer. Remove the Head Valve, Cylinder, Piston/Driver and Trigger Valve. Most likely the gun simply needs to be cleaned and all o-rings re-lubricated. The o-rings could be dry, not allowing proper seals with the cylinder and head valve.
You mentioned about skipping nails but didn't clarify the problem or solution. I suppose it's the o rings in the feeder or is it the the rings for the drive pin?
Check the o-rings on the feed piston as well as the feeder spring, to confirm these parts are not damaged or missing. With coil nailers, especially, it's easy for dirt and grime to damage these parts and obstruct the action of the feed piston. It could also be a bent driver or a driver piston, yes. Lastly (and to state the obvious but bears mentioning), make sure the correct nails are being used for the nailer. Without having the make and model number of the nailer and can only give general trouble shooting info, but it helps to inspect all parts associated with the nail feeder (if applicable), magazine spring tension (if applicable) and driver assembly.
my nailer shoots good ,im not losing any air,but it seem like i cant get a consistant amount of nails to sink properly,would me not using the nippleand going straight in w/ my line be causing this?
I don't think you not using the nipple is causing the problem, no. Most likely it's due to a worn piston/driver o-ring, or cylinder seal. If any of these seals are defective or worn, it can cause the problem with inconsistent shooting. I would remove the cap of the nailer and take the head valve and cylinder out. Make sure all seals are in good condition. It sounds like an o-ring kit may be in order, however.
thank you,i appreciate your helpful advice and quick response,the gun is new , used only once(6-7 squares)do you think if i went to a smaller diameter hose,i would have better results,or it shouldnt matter?
@@stanbury69 I doubt it's an air pressure issue. As long as you have the correct PSI dialed in on the regulator, you should be good. The diameter of the hose shouldn't matter as far as this problem is concerned. What is the make and model of the nailer?
I have a senco pro 35 brad nailer that the angle of the brad is off in regard to the opening . The driver pushes the brad into the body of the gun . Notheing looks out of line but it jams every shot . ???
Thanks for the comment! I would state the obvious first, just to mention it: make sure you're shooting the correct angle and size of brad nails. Second, the driver blade itself could be slightly bent. To confirm, you'd have to disassemble the head cap, remove the cylinder and take out the driver to ensure it's not warped at all. Third, make sure the magazine which holds the nails is attached to the nose and body of the nailer properly, and that it is aligned properly. Hopefully this helps you get started!
I have a Duo-fast RS1748B and it is bleeding air out the exhaust port. I have replaced all the o rings in the gun and it still leaks the same way. I know it's an old gun but it hasn't really been used that much so I thought the o rings would fix it. got any ideas?
It may (possibly) be that the hard parts are worn down, e.g. the Head Valve itself may be worn to the point where new o-rings wouldn't fix the issue. You may want to contact Duo-Fast and have one of their tech reps confirm this, as we're not a Duo-Fast dealer so my knowledge on their nailers is admittedly limited. To me, however, it sounds as though the Head Valve itself may be worn and therefore defective.
Husky nailers are made by various manufacturers and this info is proprietary to Home Depot. You would need to call the Husky Tools phone# or Home Depot directly for parts, I'm afraid.
Hello I have a tacwise air coil gun and when I plug it in to my air line it fires straight away with out the trigger pressed in or the safety bar pushed up. Any ideas thanks mark
Thanks Mark. I would say the problem lies in the trigger area. Without knowing too much about your particular nailer, most likely the trigger valve stem is stuck. I would remove all of the trigger components, first, and clean all of the hard parts. Lubricate the o-rings very well and reassemble. Typically this will do the trick.
Hello there everyone I have a Bostitch N66c siding Nail gun there is no leaking air but once I put air it only works the first time, I notice that only when I press the trigger valve it does have an air leak on the trigger, so I order the kit trigger valve and still didn't work, so I order the whole o ring kit and the same thing not working. I actually don't know what else to look for. any help on this. thank you
I would have thought that replacing all of the o-rings and trigger valve would have taken care of the problem as well. I would say that you need to tear the tool completely down to investigate the issue further, but it sounds like the driver might be sticking. Also, check the thick cylinder seal on the top of the cylinder (if your model has one).
Thanks for the question! This is usually due to a damaged/broken cylinder ring. This is the largest silicon/rubber ring around the cylinder inside the main body of the nailer. Otherwise, I'd look at the seal on top of the cylinder that butts up against the head valve assembly. You should notice that one of these seals is clearly damaged.
Hi bro hope you're doing ok, this is Juan valdez from Laredo texas again now mi problem is that i have a duofast 606 framing nailer that some times it nails good and some times all it does it's just air from the triger, would appreciate it if u can help me, thanks and have a good one
All good here Juan, thanks for the question. If you have air blowing through the trigger area, I'd first bet there are some o-rings that are damaged or torn in the trigger valve itself. You have to remove the actual trigger mechanism (you pull with your finger to fire the nailer), then you'll be able to remove the trigger valve. If not the trigger valve then I'd be one of the head valve o-rings is damaged, which is just inside of the head cap of the nailer. Cleaning the nailer really well and re-lubricating all of the o-rings will probably help a lot as well. Good luck!
Eric, you are the man.. everyone (me) appreciates your efforts. My question is I re-lubed my bosch nail gun to stop the massive air loss out the head. Now I have a powerful, but tiny, leak out the pinhole in the body. The pinhole looks like it serves a purpose but an unknown purpose to me. Functionally, I am 10x better than before but I need to fix this. Any idea?
Poop, I edited 2 jpgs and can't upload the pics. So, looking at the left side of my BOSCH Airhammer, it's 1" or so below the B. For a visual, I actually had a pin 1/2" IN the pinhole. A relief safety valve? TIA
Julianne Carol you can upload a picture on our forums site at www.mastertoolrepair.com. In the meantime, I will tell the factory which nailer you have.
Hey Eric, I'd like to pry at your wisdom a bit. I'm buying a Dewalt D51321 roofing nailer from someone for really cheap, but it's not working right. He says it shoots good for several nails, then air starts hissing from the inside. Do you think it's an O-ring? I figured I'd strip it apart and clean it out, and get an O-ring kit for it, but it seems like all of the repair kits for this nailer are discontinued. I'm not sure what to do. Any advice?
Thanks for the question Markus! You are correct, the o-ring kit is discontinued for this model, as you can see here: mastertoolrepair.com/pneumatic-roofing-nailer-parts-type1-d51321-p-61458.html?osCsid=ihr3jirmqq8504g3qtdnob6615 That being said, many of the individual o-rings are available. I'm fairly positive the problem is one or more o-rings or other seals are damaged in the nailer, causing the problem you're experiencing; most likely the "hard" parts are in good shape. If the former owner left it sitting for awhile, the seals could be dry rotted. Disassembling it and cleaning it would be the first priority, then inspecting each seal. It sounds as though the problem could be the #23 Cylinder Seal or any of the outer o-rings on the cylinder. There is clearly air bypassing the cylinder, which is probably the hissing sounds you're hearing. You could have some head valve seals blown out as well, so check there, but my money is on the cylinder o-rings and seal. Make sure to clean it out sufficiently and re-lube the o-rings well. Afterwards, add a few drops of pneumatic tool oil in the end cap and see what you get. Hope this helps!
Master Tool Repair Thanks for the reply! I was wondering if you may have a list of all the individual O-rings that come in the O-ring kit? I live in Canada, so I need to get this stuff shipped to the border, then drive down and pick it up. I figured I'd get all of them at once to save some time and money. Thanks again.
Below is a list of the main o-rings I'd recommend replacing, as well as the Head Gasket and Piston Seal: 614922-00, Gasket 395065-00, Seal 614983-00, O-ring 398167-00, O-ring 614982-00, O-ring 398156-00, O-ring 646359-00, O-ring 622418-00, O-ring 609018-00, O-ring 631427-00, O-ring 614994-00, O-ring 647956-00, Trigger Assy The o-rings surrounding the trigger valve are only available in the Trigger Valve Assy. You may not need to replace this valve or o-rings if you do not detect a leak coming from the trigger area, but I though I'd mention it. For the exact quantity of each, you can look at the schematic diagram at the below link which will tell you how many of each o-ring you would need: mastertoolrepair.com/pneumatic-roofing-nailer-parts-type1-d51321-p-61458.html?osCsid=e6ko38160abb6adkcge5d5vos2 Thanks!
Master Tool Repair Well I managed to find an o-ring kit for it, so I cleaned it down super good and installed the new o-rings, and no more leak! Until the next day..... started leaking again in the inside, can hear it from the exhaust port. Now I'm lost...
Hmm, the little bugger still leaks eh? If this is the case, air is somehow escaping through the head valve. It is certainly possible that the head valve itself is worn badly, allowing this to happen. Also, did you replace the #23 (reference number on the diagram) Head Valve Seal as well? This is a thicker neoprene (usually) seal on the top of the #24 Bulkhead, which butts up directly to the bottom of the Head Valve. If that wasn't replaced it could cause air to leak from the exhaust port.
Safco LLC Sorry for the long delay in this reply, I'm sure you have already resolved the problem at this point :-/ My guess would be that it's due to a worn Piston o-ring, the main o-ring seal on the Piston/Driver assembly. This, in conjunction with worn head valves o-rings, is probably causing the driver not to retract after the gun is fired, which is what you're hearing when you hook up your air hose.
I’ve been looking for a good video for years man you are the best on here
at work i repaired 3 air nailers this week (of different brands), and this addressed all the issues I've seen, thnx 😼
Thank you for taking the time to make this video. Just diagnosed/repaired second-hand Bostitch nailer just in time! Couldn't have done it without your help.
That's great to hear Joe, and it's what keeps us doing this. Thanks for the watch and for the comment!
Thanks for the vid. Had a brand new Ridgid 16 p nailer, was sticking and wouldn't reset. Only used to build a deck and a shed. Didn't need to replace any o rings but took apart, wiped down (maybe had too much oil) reassembled and worked. Tip when reassembling make sure to push the piston head all the way down the cylinder otherwise air can't recon press it and will just leak. Works like a charm now.
Wow! I had a 23 gauge pin nailer that wouldn't retract and this video helped me fix it! It saved me $100 in replacing it! Thanks a lot!
Great video and informative, although I’m having a feed problem and the spring is there for the nail pawl
My nailer drives a nail great but takes forever to reset to drive another nail, why? It’s like the nail set piston is jamming up for a few seconds
Will have to send this link to my son-in-law, he has started roofing for a living and I know he's gone through a couple of nailers already.
Great video - I appreciate that you really know this subject and you share the names of the nailer parts as you touch or take off. Well done thanks
Thank you so much for the compliment, we're glad you got something out of it!
By "exhaust valve", he means check valve; the exhaust valve is something else, at the top of gun.
Great vid Im the tool tech for a big box store that has a rental department they started a program 3yrs ago where we will fix ur stuff LOL. Im good on small engines some electrical but nailers I usually send off cause now I have to fix store and customer stuff with no parts on hand and no time to guess ,this really helps , but the ones i usually do are always trigger valves.
Thanks for taking the time to make this tutorial.
We appreciate it, and thanks for watching!
N62fn bostitch Air blows from trigger when pressed. Replaced trigger still leaks. Also driver not retracting
Thank you for taking time to make this video. Now I know why my nailer is malfunctioning.
Wanted to know if you were able to get the nail gun in the video working? I have the same gun that I am working on now. I am satisfied I have a leaking head valve seal. I did some research and found the head valve has been changed from a single o-ring to a double o-ring style. I ordered the updated head valve and a new cap. Was not sure if the new style head valve would work in the original cap. Just curious if you might have come across this.
Is there way to get info on parts for a store brand nailer from OSH Orchard Supply Hardware that went out of business? I really like the fix it. During the meantime I purchased a new Husky roofing nailer from Home Depot. The instruction on that one seems very strange and dangerous. Will try it in the next few days.
What impresses me …this video is a little over 6 years old (10/18/20) and you are still responding to questions.
Thank you Jeff, we appreciate this compliment. We're in it for the long haul. We're a small business and started out in a garage repairing local customer's equipment. It feels good to help answer people's questions and get their equipment working again, so they can get back to work. This is just an extension of those days! We can't answer every question wisely but we do try. Stay safe!
Great video: I own a brand new DeWalt model DW45RN roofing coil nailer. Currently it's working but it cycles very slow. I shoot a nail, then I have to wait about 5 seconds for it to retract before I can shoot the next nail. Air pressure is set to 100 psi and I use 3in1 oil as the lubricant. There's no water in the system; what could be the problem? Thanks
Thank you for the video....worked my roofing nailer and it works great.
Will this all apply to framing nail guns? I have a Max SN883RH3 SUPERFRAMER. Just hisses when I pullnthe trigger. Probably the best gun I've used over ghetto last 15 years till now, Internet seems void of specifics on repairing this gun.
Bostitch 15g finishing guns have a built in air-blower button. Many of those blowers leak badly even when brand new. Have you ever had to deal with this? I read somewhere that a factory defect installed a bunch of damaged O-rings.
I have a Central Pneumatic roofing nail gun, 93253. I watched the clip and took it apart. There are two green bumper parts that deteriorated. One is a dampener at the very back, the other is a external dampener on the outside of the piston cylinder. I can not find a place to buy replacement parts. Major spare part suppliers do not list Central Pneumatic, neither Harbor Freight. Any idea? I believe that this brand uses parts that are designed for another brand. 2022-11-22
Thanks for posting, learnt a lot.
Any idea why I can't find any sort of rebuild kit or o-ring kit for a Ridgid framing nailer??
You're welcome, and thank you for the comment Graham. Depending on who made the unit for Ridgid, it may be difficult to find parts for your nailer. What is the model number? For some reason, they're discontinuing many parts for multiple tool models. I couldn't say why this is the case, it could be because certain parts just don't move very quickly or there could be a supply problem.
Hi , I have a bostitch coil nailer it’s not moving the nails forward ,any idea of what might be wrong?
Thanks for the question! For coil nailers, the problem is typically with the Feeder mechanism on the nose of the gun. As long as nothing obvious is the issue (like the wrong type of nails are being used, etc.) then most likely the Feeder Spring is damaged, which is not allowing the Feeder mechanism to operate and advance the nails into the Firing Chamber. I would remove the cover from the side of the Nose, then inspect the Feeder itself and all of the springs (I believe there are 2 or 3, depending on the model). Most likely this will be the issue. Also, it's a recommended to clean the Feeder very well with parts cleaner while you're in there because there is probably a lot of debris that's hindering the Feeder from operating.
Good luck!
Thank you much for your assistance
@@jermainefjolly Glad to help!
Literally everyone u said happened to my nailer thanks so much
Glad we can help, Matt!
Great video, now I know how to rebuild it correctly when it goes out again.
I have a hitachi coil siding gun and have air leaking out of the trigger and it won't fire. After watching your video I am assuming it is the trigger valve? Need a kit for that and how hard is it to repair this issue. Thanks in advance
What an excellent video! I have on problem not mentioned though. Since I bought it new my hitachi construction stapler sinks the nails half way down until I shoot it 100 or more times then it works like a champion... It's not my air hose or compressor...I've never fixed a nail gun, had dozens of them, but after seeing this video I see no need to buy a new gun every time my old one breaks!
David Sanders We must remember - the new does not mean better! (i fixing my tools in a workshop).. all the times...
David Sanders This may be due to dirt or grime in the cylinder, honestly. I would see if you can simply remove the head with head valve and remove the cylinder; it's pretty simple to disassemble. I'd clean it out, re-lube the o-rings and add your pneumatic tool oil, it should do the trick. Most of the time this happens because the components are not lubricated well enough. Make sure all of your o-rings and seals are in good shape when you disassemble. Oh, and thank you!
great video by the way.. I have a Bostitch 18 gauge bread maker model number sb-1850bn.. when I go to use it or does nothing but burst of air out of the exhaust port openings. opened it up but o rings look fine. are they bad or can u make a video/explain why it's not firing. note: as friend used it with a 16g set of nails not sure if that damaged something but does not seem to have a mail lodged.. thanks nick
Thanks, saved me sometime taking stuff apart I didn't need to. My 12 year old Hitachi narrow crown stapler was just blasting air out of the exhaust when air is connected. The whole plastic top valve is crumbling apart like its made of cheddar cheese. Seems like in an environment where it's constantly exposed to petroleum oil they would make it out of a plastic that doesn't deteriorate when exposed to petroleum oil 🙄
thank u for this video. from watching this video over n over when i had an issue, and taking the guns apart. i was able to learn how to repair hitachi guns and start making money doing it. you sir are great ! lol
Thank you so much Adam, this is a great compliment!
hey man , whats ur email or something i can contact u at to ask some questions about some bostitch guns ? would really appreciate it. thanks
I found the head valve in my Bostitch N75C basically broken from drying out i suspect. Just ordered a new one. I swear, if you bought every part in these guns, you'd spend a fortune. Thanks
I know I might not get an answer since your original post is over 7 years old but I still tried to post a question earlier. However, I think it failed. So, here it is again. I have a Craftsman 351-18306 crown staple air gun. It is dry firing. The piston / hammer only bounces off the lower stop and does not retract back up so the next staple is trapped. My air pressure is only 40 lbs. I couldn't find a repair kit but, I found an O-ring that seals the piston better. But, that didn't fix the problem. Do you have any other part / fix recommendation? I new at using air tools so don't clearly understand how the air is supposed to change from driving the piston down to then pull the piston back up. I'd really appreciate some explanation on this and some suggestions on what other part or parts might cause the dry fire problem. The piston / hammer assembly does move back up pretty easily when I manually pushed up. Now it has slightly more resistance after I put a new O-ring on the piston. But, something seems to cause the air to not return the piston back to the up position. I know air is supposed to return the piston to the top but, it just seems to me that a spring piston return to retract the piston / hammer back up might have been more reliable than relying on an air valve to change the air flow to push the piston back up.
Thanks for the post! The problem could be caused by many things. Is the driver retracting fully to allow the next fastener to be grabbed by the driver? This is the first thing that needs to be checked. Not if you push it up manually, but after firing, when you look into the magazine, is the driver still partially down to NOT allow the next fastener to be driven?
Mine had air leak out top exhaust and nothing happens when pull trigger. I replaced the cylinder seal after unjamming nails and it has worked great for months.
Any suggestions on why Grip Rite GRTCS250 coil siding nailer fires first nail but blade stays forward and next nail isn’t picked up. Gun is essentially new but I’m not the first owner. Any suggestions very welcome
Master Tool Repair. Thanks for the quick response. Good info. The ones we work with are RN 46 I believe. 👍
Ty all vm I have about 5 guns to rebuild do u all sell senco rebuild kits
thank u to expelain it very good u are very knowledgeable man u are and very simple show us thank and god bless u
Thanks man....I just scored a now classic Senco SFNII for 8 bucks....she shoots but has that upper blow by so I need to reseal her....great little refresher for me since I haven't seen the inside of a nailer for 23 years since I made the transition from pro to weekend warrior....
Glad this video could give some assistant, Mike. Most of the time, throwing in a seal kit is the best option, especially for older nailers. If you clean it out, install new o-rings and grease 'em up really well, the nailer should shoot beautifully (barring any hard parts being damaged). That SFNII is a tank of a nailer, excellent pick up!
@@MasterToolRepair yeah...sort of sentimental to me too...I learned to build cabinets on one...In my little hobby shop now I have a much newer 15 gauge senco (can't remember which model now) with teflon piston, etc that works excellently but the one I just picked up will be great as a back up or anytime I get a wild hair to do some arm curls in the shop...lol
@@jcat5150 Ha! You certainly can do arm curls with that beast!
I have a Campbell Hausfeld air framing nailer. Problem is when it shoots it inverts the nail head only just into the wood. Unsure where to start diagnosing. Advice?
I have two roofing nr46's that were working fine and now it seems the feeder Is not pulling the nails up. One looks like the feeder piston makes the feeder pop out to the side. is there a fix for this ?any help would be greet.looking online all over and can't find a solution.
My Bostich Framing nail gun stopped working, the piston doesn't retract. So, I purchased a rebuild kit and rebuilt the nail gun, and still does not retract the piston. What did I do wrong? ?
Hey good video. I always have issue with nail not loading back up after being fired. You mentioned the feeder piston O ring. Are these 2 orings in the bostitch rebuild kit ? RN 46 ?
They sure are! Reference numbers 36 and 38 are the feed piston o-rings and the OEM parts lists states these are included in the RN46-RK Rbld Kit:
www.mastertoolrepair.com/for-rn46-rn46-rk-p-3837.html
Good chance the problem lies there so I'd replace the o-rings first.
Bought a used bostich framing nailer and it works great. Only problem is will shoot a 2 3/8 nail fine but won't shoot a 3 1/8th. Seems the nails won't go into the tube to fire. Is there an adjustment to allow a longer nail.
Thanks for the comment John. It really depends on the model number of the nailer, do you have this?
Nice video and information i need your help i have a senco 600 the problem it has is on the top leaks air comtinously.
I just did a complete O ring and trigger kit on a dewalt D51844 type 1 and I did not fix my problem. (Air leaking heavily out the nose) Any ideas what I could try? Thank you
Hey great video. My identical nailer as in this vid, leaking like crazy from trigger valve. After replacing the valve, the nailer no longer leaks, but will not shoot. It seems as though the trigger is not making contact with the valve. Also my piston firing ring did slide right down the cylinder and I pushed it back, it seems to be holding now. Still won't fire. Im wondering If I'm missing a part around the trigger?
Thanks for the comment and compliment James! I would say the safety trip arm is probably not hitting the trigger actuator. This is what allows the trigger to depress the trigger valve and fires the tool. Check to see if it's assembled incorrectly. The piston/driver sliding in the cylinder is not uncommon with age and continued use so replacing the piston ring could possibly help this.
Hello I have DeWalt d51850 the Piston isn't retract. You mentioned that may be Piston seal. How many seals the Piston have? Thanks
I also have a porter cable FN250C finish nailer. It's a few years old but never used. When I push the nose down on my work piece and then pull the trigger the piston does not cycle and air releasesfrom the trigger. Took it apart and cleaned out the cylinder but still does the same thing. Any suggestions?
This sounds to me like you may have bad/damaged o-rings in the Head Valve; did you check all o-rings on the inside and outside of the Head Valve (inside the cap)? If they look like they're in good shape then I would remove the trigger valve & inspect these o-rings as well. It could be that one of the small o-rings on the trigger stem inside the valve needs replacing. Typically this happens due to grit and debris inside the nailer, or dry-rot due to insufficient lubrication. Many times just cleaning out the gun and re-lubing will solve this problem.
+Master Tool Repair not exactly sure how to complete remove the head. it didn't just come off like the one in your video. do I have to pry it out some?
It can be a bit difficult to remove but the top head Cap will come off. Once you remove the four head bolts I'd recommend taking a rubber mallet and tapping the side of the Head Cap until you dislodge it, then it will be easy to remove. BTW you can see a full breakdown of this nailer for reference by clicking on the below link:
www.mastertoolrepair.com/pneumatic-finish-nailer-parts-type1-fn250c-p-61463.html
+Master Tool Repair well I think I found the problem. Two seals that are around the silver button of the trigger assembly but of course can't just get the seals and have to but the whole assembly.
It is true, Porter Cable simply doesn't offer them separately as it's only available in the $18 trigger kit; this is pretty typical. You can see if you can go to a Fastenal or similar outlet to find a match for the individual o-rings, good chance you can. Glad you found the problem parts though. Good luck!
Hi, I have a FN250SB nail gun with a nail wedged so the slide won't move. Several nails had gotten wedged in there and I got most of them out, but of course the last one broke off. Do you happen to have a video that shows how to take the magazine apart so I can get the broke piece of nail out.
We don't have a video that specifically shows how to disassemble the magazine, unfortunately, but the magazine does come apart. It can be a little tricky as there are quite a few parts to it (bolts, nuts, springs etc.). We do have a parts breakdown for this model nailer that may help, just click on the below link to view it:
www.mastertoolrepair.com/pneumatic-finish-nailer-parts-type0-fn250sb-p-648599.html
If you still need more assistance I'd highly recommend contacting a technical rep with Porter Cable. You can reach them by calling (888) 848-5175.
I have a bostitch n80cb that fires a nail whenever I put air to it. I have changed the trigger and it still does it. I was wondering if you had any tips? great video by the way.
Thanks for the question George. It would be helpful to know if it works properly after the initial plug-in fire or not at all. In 90% of cases it is the Trigger Valve that will cause this for sure, but if it is the trigger valve it will not function later.
In rare cases, the outer o-rings on the head valve can be worn or degraded enough that it does not seal the initial burst of air properly upon plug-in and can make the head valve “pulse” once, but then will often work just fine until released and plugged in again.
Hey my hitachi shingle nailer is like not decompressing fast enough and I can't shoot twice back to back ..what would cause this
I have boach n12 coil roofing nail gun, air comes out of the nail feeder. Which kit do I need, the trigger o-ring or piston o-ring kit?
''Great Video'' buddy, keep them coming. I have an issue where my gun doesn't fire as in your explained video. [How do I find out the (sin number) for ordering parts? And where does ones-self order parts for there air gun, and have it shipped personally to there home My gun is a Bostitch the side where loading coils drop away from the gun. I'm not sure where to find ordering info needed, if you don't have the box or packaging book or etc... Thanks is advice.
Thanks for the question. You have a Bostitch coil nailer. Is it a roofing or framing nailer?
If you could send a picture of it to etrotman@mastertoolrepair.com maybe we can identify it and then show you the page where you can order parts.
Just rebuilt my SENCO Prodriver 35 with a complete overhaul OEM kit to fix a "driver fails to return" after fire problem. No joy. Is there a return air port that might be clogged or a particular O-ring I should be looking at? (Nice vid, BTW)
Since I don't have the nailer here to diagnose, I would honestly contact a service rep at Senco directly by calling them at 800-543-4596. Thanks for watching!
Great video. I have a little max CN450G coil gun - I have pulled the top off- the piston barely moves in the cylinder- the top o ring was stuck and stretched - I tried what you did in the video (hammer tap) to get the cylinder out but it didn't work. When I push the safety and pull the trigger it give a pssssh and thats it. Any thoughts?
Thanks for the compliment! The nailer may be a bit dry and the seals could have some dry-rot, not to mention grit and grime that makes its way into the nailer, so it can be difficult to remove the cylinder sometimes. I would keep tapping on the body of the gun with a rubber mallet until the cylinder dislodges, but you may need to put a shop towel over the top of the cylinder and take some vice grips to it to try and pull it out using this method. Just make sure to use a rag or towel over the cylinder so the vice grips don't damage the cylinder. Once you do remove it, you'll probably see that one or more of the outer cylinder seals is damaged or missing. Also, check the o-rings in the head valve. It most likely needs to be cleaned out thoroughly, a new o-ring kit installed and the gun lubricated with pneumatic tool oil. Hope this helps!
Got it! Thanks so much. Was really stuck in there. The whole gun was drowning in oil but that may have been me loading it up to try and get it working again. I will get an O ring kit and see how I go. Thanks again!
I have an older Bostitch 16 gauge staple gun, likely from about 2005. It is a Bostitch 650S4 model, lightly used and in good physical shape. I stopped working and had an exhaust cap leak at the head. Seal kits from Bostitch are no longer available, but I was able to find an aftermarket kit containing just the o-rings online. I took the unit apart, cleaned the unit, replaced 7 o-rings and assembled everything again. Plugged in an air hose, and the unit is working again, but now I have a leak at the bottom of the cast frame where the “hammer” comes through the bottom of the cast orange housing. It’s basically right near the top of the staple, close to the hammer (that strikes the staple. Basically a steady stream of air coming through this area. Not sure what has failed here. Any thoughts on what causes this? Thanks.
If the frame of the gun is cracked there’s nothing you can do. Air tools are very simple in design. They do not have a lot of parts to them. Any air leak is seal related or bent and worn internals of the gun
Have 2 Hitachi nv45ab2 guns both with nail skipping, I cleaned the feeder mechanism but haven't disassembled the feeder piston. I did notice when a nail is skipped the driver is still deployed and not fully retracted. I'm not sure if the reason the nail skipping is because the driver isn't fully retracted or the reason the driver isn't fully retracted due to the nail stopping the driver from fully retracting. Have you seen this before, I will be ordering an overhaul hit for this. The second gun does the same however when turning the gun upside down I can hear the driver slide down to the other end
Good video, was hoping to hear any ideas on nail skipping.
Thanks for the question John. I would recommend taking the feed piston out and checking the o-rings, most likely these o-rings need to be replaced, and I would also replace the feeder spring while you're in there....that's a common problem. If the driver doesn't retract completely, however, this is indicative of a bad cylinder seal, which is the seal located on top of the cylinder that butts up against the head valve. Replacing these items along with all other common wear o-rings should take care of the problem, certainly.
@@MasterToolRepair Parts are on order will certainly be replace all seals and the feeder spring as well. Thanks for the reply
Just got a used roofing nailer of someone, went to use it the same day and it worked for half a bundle of shingles, but it suddenly just stopped pushing nails in. A squeeze of the trigger would let air out, but there would be no nail shooting out. Checking if the coil was kinked but that wasn't the problem. Still not sure what's wrong it it, didn't look at it too much as we had other nailer so I just switched and went on with the day.
Any chance you know what happened with it? It doesn't leak air anywhere. Maybe it's just not pulling the coil up to place the next nail in the barrel?
A couple of things could be going on here. One, I would take a look at your feeder piston on the side of the nose of the nailer. Take the plastic cover off and inspect the feeder piston o-ring and the feeder spring itself. Make sure nothing is damaged and that the o-rings still hold their shape and are lubricated.
Next, I would take the head cap off and cylinder out. Check the cylinder seal and all o-rings on the cylinder. Also remove the plastic head valve from the head cap and inspect the o-ring on the outside and inside of the valve. These tend to flatten over time and lose their round shape which may not cause the head valve to seal well. It may also be that the plastic head valve is worn and needs to be replaced.
Lastly, the feeder and internal body of the nailer may just need a very good cleaning. Roofing nailers get a lot of grime and grit built up on the hardware so it just may need a complete cleaning and all o-rings re-lubricated.
Hope this helps!
Exhaust seal for pin that does not retract. Mmmmm okay going to check that out.
Mine is a simple brad gun may not have seal rings in piston.
Will check again .
....any cure on a brand new rn46 just slightly mangling nail heads..way out on the long end of a few hoses..@80psi?
If the nailer isn't shooting the nails straight into the wood, the driver itself is the issue. As long as the nails are installed properly and are being fed into the nose of the nailer properly, the issue has to be with the driver itself.Hopefully, it's not bent. Since it's a new nailer you may want to contact Bostitch directly or the outlet you purchased it from and have them either repair it or replace it under warranty.
@@MasterToolRepair It's still shooting quite a few of umm good..it shouldn't matter if they ain't BOSTITCH out of the Box?! but Thank You! (I've got this full box of Grip-Rite roofing nails and should it matter!)
@@foxyroxstar It shouldn't matter what brand the nails are, no. As long as the coil nails are the right type and gauge, you should be fine. Make sure the nails are correctly positioned in the magazine. But if the nails came with the nailer when you baought it new, they should work for you, and as long as you have the correct PSI going to your nailer. You may want to give Bostitch a call at 800-556-6696.
@@MasterToolRepair Now That IS a big help! You may want to give Bostitch a call at 800-556-6696! I didn't wanna start out with a Big Bang Theory..95psi! Thanks Again...(twas a "pet" account name but makes people laugh!)
@@foxyroxstar I'm glad to hear it. Good luck!
Well done!
Very helpful video sir! I have a question...im thinking of buying a hitachi roofing nailer for myself because thats what i use at work all the time and what most people around me say is the best. But, Is there really a significant difference from a $300 nail gun and a $150 nail gun? The answer is most likely obvious but i was hoping you could elaborate on that...and also, if you could mention your favorite nailer brand.
Hi Walter, some people prefer the Hitachi due to it's light weight, but others like the Bostitch due to how you load the nails.
If you are using it every day, you will have a preference of your own. The Hitachi has less moving parts and seems to last longer, but there are many out there that prefer the ruggedness of the Bostitch nailer. To point out the obvious, yes, these brands' nailers are simply made better (and parts are readily available!).
Mine doesn't leak from the trigger or the top but when i push it on to the wood and fire it I here air
I have one thats probably 15-20 years old but with very light use. When I push down on the tip and squeeze the trigger, it won't fire a nail, it just makes an air hiss.
I have a old Haubold staple gun it sounds like it fires when trigger is pulled but piston does not retract what would cause this ?And can I get parts for it if so where ?
I'm not familiar with that brand so I can't give specific advice, but usually this is caused by a faulty cylinder seal. There should be a seal on the top of the cylinder, inside the body of the nailer. If this is damaged, it won't form a tight seal with the head valve and your piston won't retract. I would disassemble it and inspect all of the cylinder seal and all other cylinder and head valve o-rings. Thanks for the comment!
Thanks for the tips. It's a rn 46 in nearly new condition. I'm now thinking it's possibly grime. I'll clean it out first.(where is the best place to get the o rings?)
Here you go! mastertoolrepair.com/pneumatic-coil-roofing-nailer-parts-rn46-p-10979.html
Rn45
Thanks for the video. I have a bostitch small nailer that I got at Christmas. I have only used it a dozen of times. It works great but I have a constant leaking of air out of the tip where the nail comes out. I use oil every time I use it. Maybe more oil?? Hard to believe I would need to replace an o ring this early in the game.
Btw your voice sounds exactly like James Hetfield from Metallica.... lol
James Hetfield eh? I'll take it! Haven't got that one before but I dig Metallica :-)
You wouldn't think the o-rings would need replacing, I agree. However, we have no idea of knowing how long the nailer was in the factory's warehouse (or sitting on the shelf at the retailer) before you purchased it, so it could be that the o-rings already started to dry-rot. It's not likely, but I wouldn't rule this out. Also, it depends on the climate, but if you oil it regularly this shouldn't be an issue either. Any leak from the nose comes from the outer diameter o-rings on the cylinder sleeve or cylinder ring/bulkhead ring. If any of them leak, it comes out of the nose. At rest, the tool only has pressure in the upper part of the tool. I would disassemble the nailer and inspect the seals and o-rings on the outside of the cylinder as you'll most likely find the problem there.
So, where would I get these O-ring kits? Specifically for a Blue-Point AT 5000 Impact gun. I got it for free, but everything leaks and has not much power...
James Justice Sorry for the long delay in this reply! Any o-ring kits for Blue Point pneumatic tools would have to be sourced from Snap-On directly as this is their proprietary brand.
many thanks, fixed my nailer with this video. And kick ass info in this vid.
We really appreciate the watch and the compliment. Thank you!
Hello I have a MIII812CNCT issue, where driver does not retrack, and air simply blows out. Would you say the exhaust valve seals are the main culprit or the trigger? Any information is greatly appreciated. Thank you for your time. Ron
Thank you for the watch and for the comment! Most likely it's the BC1332 Seal, which you can find at the below link:
www.amazon.com/BOSTITCH-BC1332-Seal-Valve/dp/B00XKSEDN4
This seal is inside the main chamber of the nailer at the bottom, and it's common for it to crack and damage. I would disassemble it to inspect this seal and I would probably start by replacing it. I hope this helps!
@@MasterToolRepair Thank you for your time and advice. Will confirm fix after I inspect and replace seals.
@@battime5418 Glad to help if I can. Good luck!
Good vid....thanks for great talk thru the details of how simple these weapons I mean tools really are!
Thank you!
Hi bro nice video ,my question is i have the same nailer and my problem is that when i want to nail a shingle i only mark the shingle with the pistons head then i open the case where the coil nails go i push it and then it will work but if i don't do this it won't work i have no air leaks nor so , i would appreciate it if u can help me ,thanks
Thanks Juan! What you have is a very common problem with this Bostitch nailer. If the nailer fires without leaks but won't advance the nails through the nose, that's caused by the Feeder and/or Feeder Piston O-ring(s). If you take the side cover off of the nose you'll see the Feeder Piston. Most likely the small o-rings on the feed piston are torn up, which won't allow the piston to operate and the Feeder to actuate and advance the nails. Also, check the small springs in the feeder.
Most of the time we find that there is just a ton of grit and gunk built up in the feeder and nose, so I would clean the nailer very well, re-lube all of the feeder o-rings and see if it works for you!
My Dewalt 15 gauge will only fire with the trigger removed leaving the trigger Valve in and hitting the button. Any suggestions? Almost like there's not enough trigger travel to hit the valve button.
Do you have a model number for your nailer? This will help me give more detail. But, it sounds like the safety mechanism is at fault here. When you push the nose against the surface medium, the safety mechanism should push against the trigger valve to fire the nailer. This may not be happening. I should be able to give more detail with a model number, however.
I replaced trigger valve and it still blows air there but fires?
I have a fairly old (Purchased in 1991.) Bostitch N60FN that is not firing properly. When I pull the trigger it sounds like a short burst of air is releasing from the trigger area and that's it. Nothing else happens. I've replaced the trigger valve with a brand new lubricated kit. No change. The cavity where the trigger valve goes into seems very clean too. This finish nailer has sat idle for at least four years or more so I'm sure I have some brittle o-rings or seals somewhere. Any thoughts?
Thanks for the watch and question! Yes, I agree that you probably have dry-rotted o-rings and seals, especially since it sat for that long. I would replace all of the o-rings on the cylinder and head valve as well, and lube them up well. Once you do this it'll probably fire like new. Cleaning the hard internal parts then replacing the rest of the o-rings should fix it right up.
@@MasterToolRepair Thank you so much for the quick reply. Do you happen to sell the o-ring kit? If so, what is the part #? Thanks again!
@@MrDoodsie56 You're welcome! I don't see a complete o-ring kit available for this older nailer I'm afraid, but there are individual o-rings available. You can find them on the Bostitch ServiceNet website by clicking on the below link:
servicenet.bostitch.com/Products/Detail/N60FN
The valve piston gets stuck in the cap complete on my makita an902 after 20-30 nails, could it be the compression spring needing replacement?
What does the parts look like on the driver on a Bostitch shingle nailer
Parts for the driver
I have an SX 32 bostich air stapler I have replaced the trigger valve, and installed an O ring kit. Something is still wrong. As soon as I hook up the air hose the gun fires a staple. The piston does not retract, I have to remove the air hose to get the piston to retract. It fires without pressing the trigger or safety.
Help
Thanks for responding, the air comes out of the trigger only when i press it to nail , and no nail comes out ,it feels like if the trigger needs more back space
Glad to help. The trigger valve itself is probably the problem, but you could also have head valve seals that are stuck. I would certainly remove the head cap and disassemble the entire nailer. Remove the Head Valve, Cylinder, Piston/Driver and Trigger Valve. Most likely the gun simply needs to be cleaned and all o-rings re-lubricated. The o-rings could be dry, not allowing proper seals with the cylinder and head valve.
I picked up this lube with antifreeze and water emulsifier . Best thing I did for my Bostitch . (antifreeze cuz it's cold up here )
What's it called
You mentioned about skipping nails but didn't clarify the problem or solution. I suppose it's the o rings in the feeder or is it the the rings for the drive pin?
Check the o-rings on the feed piston as well as the feeder spring, to confirm these parts are not damaged or missing. With coil nailers, especially, it's easy for dirt and grime to damage these parts and obstruct the action of the feed piston. It could also be a bent driver or a driver piston, yes. Lastly (and to state the obvious but bears mentioning), make sure the correct nails are being used for the nailer. Without having the make and model number of the nailer and can only give general trouble shooting info, but it helps to inspect all parts associated with the nail feeder (if applicable), magazine spring tension (if applicable) and driver assembly.
first thank you for the video, good voice good speed good job.
Thanks Dan!
my nailer shoots good ,im not losing any air,but it seem like i cant get a consistant amount of nails to sink properly,would me not using the nippleand going straight in w/ my line be causing this?
I don't think you not using the nipple is causing the problem, no. Most likely it's due to a worn piston/driver o-ring, or cylinder seal. If any of these seals are defective or worn, it can cause the problem with inconsistent shooting. I would remove the cap of the nailer and take the head valve and cylinder out. Make sure all seals are in good condition. It sounds like an o-ring kit may be in order, however.
thank you,i appreciate your helpful advice and quick response,the gun is new , used only once(6-7 squares)do you think if i went to a smaller diameter hose,i would have better results,or it shouldnt matter?
@@stanbury69 I doubt it's an air pressure issue. As long as you have the correct PSI dialed in on the regulator, you should be good. The diameter of the hose shouldn't matter as far as this problem is concerned. What is the make and model of the nailer?
Great video. liked and subbed
We appreciate the watch!
I have a senco pro 35 brad nailer that the angle of the brad is off in regard to the opening . The driver pushes the brad into the body of the gun . Notheing looks out of line but it jams every shot . ???
Thanks for the comment! I would state the obvious first, just to mention it: make sure you're shooting the correct angle and size of brad nails. Second, the driver blade itself could be slightly bent. To confirm, you'd have to disassemble the head cap, remove the cylinder and take out the driver to ensure it's not warped at all. Third, make sure the magazine which holds the nails is attached to the nose and body of the nailer properly, and that it is aligned properly. Hopefully this helps you get started!
I have a Duo-fast RS1748B and it is bleeding air out the exhaust port. I have replaced all the o rings in the gun and it still leaks the same way. I know it's an old gun but it hasn't really been used that much so I thought the o rings would fix it. got any ideas?
It may (possibly) be that the hard parts are worn down, e.g. the Head Valve itself may be worn to the point where new o-rings wouldn't fix the issue. You may want to contact Duo-Fast and have one of their tech reps confirm this, as we're not a Duo-Fast dealer so my knowledge on their nailers is admittedly limited. To me, however, it sounds as though the Head Valve itself may be worn and therefore defective.
Where can I get the o rings for my husky air nailer. Or just a regular kit will fit ?
Husky nailers are made by various manufacturers and this info is proprietary to Home Depot. You would need to call the Husky Tools phone# or Home Depot directly for parts, I'm afraid.
@@MasterToolRepair thanks for the info
hi , i need an o-ring kit for a senco finishpro 35. i went to your website and found the kit unavailable from you ?
Hello I have a tacwise air coil gun and when I plug it in to my air line it fires straight away with out the trigger pressed in or the safety bar pushed up. Any ideas thanks mark
Thanks Mark. I would say the problem lies in the trigger area. Without knowing too much about your particular nailer, most likely the trigger valve stem is stuck. I would remove all of the trigger components, first, and clean all of the hard parts. Lubricate the o-rings very well and reassemble. Typically this will do the trick.
Hello there everyone I have a Bostitch N66c siding Nail gun there is no leaking air but once I put air it only works the first time, I notice that only when I press the trigger valve it does have an air leak on the trigger, so I order the kit trigger valve and still didn't work, so I order the whole o ring kit and the same thing not working. I actually don't know what else to look for. any help on this. thank you
I would have thought that replacing all of the o-rings and trigger valve would have taken care of the problem as well. I would say that you need to tear the tool completely down to investigate the issue further, but it sounds like the driver might be sticking. Also, check the thick cylinder seal on the top of the cylinder (if your model has one).
How about when you pull the trigger air comes out of the exhaust? No firing no other symptoms. Only leaks when trigger pulled
Thanks for the question! This is usually due to a damaged/broken cylinder ring. This is the largest silicon/rubber ring around the cylinder inside the main body of the nailer.
Otherwise, I'd look at the seal on top of the cylinder that butts up against the head valve assembly. You should notice that one of these seals is clearly damaged.
Hi bro hope you're doing ok, this is Juan valdez from Laredo texas again now mi problem is that i have a duofast 606 framing nailer that some times it nails good and some times all it does it's just air from the triger, would appreciate it if u can help me, thanks and have a good one
All good here Juan, thanks for the question. If you have air blowing through the trigger area, I'd first bet there are some o-rings that are damaged or torn in the trigger valve itself. You have to remove the actual trigger mechanism (you pull with your finger to fire the nailer), then you'll be able to remove the trigger valve. If not the trigger valve then I'd be one of the head valve o-rings is damaged, which is just inside of the head cap of the nailer. Cleaning the nailer really well and re-lubricating all of the o-rings will probably help a lot as well. Good luck!
Eric, you are the man.. everyone (me) appreciates your efforts. My question is I re-lubed my bosch nail gun to stop the massive air loss out the head. Now I have a powerful, but tiny, leak out the pinhole in the body. The pinhole looks like it serves a purpose but an unknown purpose to me. Functionally, I am 10x better than before but I need to fix this. Any idea?
Julianne, where is the pinhole exactly you are speaking of?
Poop, I edited 2 jpgs and can't upload the pics. So, looking at the left side of my BOSCH Airhammer, it's 1" or so below the B. For a visual, I actually had a pin 1/2" IN the pinhole. A relief safety valve? TIA
What is the model number of your nailer so that I can look at the breakdown or get in touch with the factory?
Bosch SN350-20F-RT 20-Degree 3-1/2-Inch Full Head Framing Strip Nailer :) is for you :( is for the Bosch nail gun :( is for YT not allowing pics
Julianne Carol you can upload a picture on our forums site at www.mastertoolrepair.com. In the meantime, I will tell the factory which nailer you have.
good video !!
thanks.
use a silicone grease for reassembly
Thank you and yes, a silicone o-ring lubricant can certainly aid in reassembly of all components and make it much easier!
Hey Eric, I'd like to pry at your wisdom a bit. I'm buying a Dewalt D51321 roofing nailer from someone for really cheap, but it's not working right. He says it shoots good for several nails, then air starts hissing from the inside. Do you think it's an O-ring? I figured I'd strip it apart and clean it out, and get an O-ring kit for it, but it seems like all of the repair kits for this nailer are discontinued. I'm not sure what to do. Any advice?
Thanks for the question Markus! You are correct, the o-ring kit is discontinued for this model, as you can see here:
mastertoolrepair.com/pneumatic-roofing-nailer-parts-type1-d51321-p-61458.html?osCsid=ihr3jirmqq8504g3qtdnob6615
That being said, many of the individual o-rings are available. I'm fairly positive the problem is one or more o-rings or other seals are damaged in the nailer, causing the problem you're experiencing; most likely the "hard" parts are in good shape. If the former owner left it sitting for awhile, the seals could be dry rotted. Disassembling it and cleaning it would be the first priority, then inspecting each seal. It sounds as though the problem could be the #23 Cylinder Seal or any of the outer o-rings on the cylinder. There is clearly air bypassing the cylinder, which is probably the hissing sounds you're hearing.
You could have some head valve seals blown out as well, so check there, but my money is on the cylinder o-rings and seal. Make sure to clean it out sufficiently and re-lube the o-rings well. Afterwards, add a few drops of pneumatic tool oil in the end cap and see what you get.
Hope this helps!
Master Tool Repair Thanks for the reply! I was wondering if you may have a list of all the individual O-rings that come in the O-ring kit? I live in Canada, so I need to get this stuff shipped to the border, then drive down and pick it up. I figured I'd get all of them at once to save some time and money. Thanks again.
Below is a list of the main o-rings I'd recommend replacing, as well as the Head Gasket and Piston Seal:
614922-00, Gasket
395065-00, Seal
614983-00, O-ring
398167-00, O-ring
614982-00, O-ring
398156-00, O-ring
646359-00, O-ring
622418-00, O-ring
609018-00, O-ring
631427-00, O-ring
614994-00, O-ring
647956-00, Trigger Assy
The o-rings surrounding the trigger valve are only available in the Trigger Valve Assy. You may not need to replace this valve or o-rings if you do not detect a leak coming from the trigger area, but I though I'd mention it. For the exact quantity of each, you can look at the schematic diagram at the below link which will tell you how many of each o-ring you would need:
mastertoolrepair.com/pneumatic-roofing-nailer-parts-type1-d51321-p-61458.html?osCsid=e6ko38160abb6adkcge5d5vos2
Thanks!
Master Tool Repair Well I managed to find an o-ring kit for it, so I cleaned it down super good and installed the new o-rings, and no more leak! Until the next day..... started leaking again in the inside, can hear it from the exhaust port. Now I'm lost...
Hmm, the little bugger still leaks eh? If this is the case, air is somehow escaping through the head valve. It is certainly possible that the head valve itself is worn badly, allowing this to happen. Also, did you replace the #23 (reference number on the diagram) Head Valve Seal as well? This is a thicker neoprene (usually) seal on the top of the #24 Bulkhead, which butts up directly to the bottom of the Head Valve. If that wasn't replaced it could cause air to leak from the exhaust port.
I have the bostitch rn46 and it skip nails and sometimes the feeder pops out plz help me on more details
.what's the issue with skpping nails?...air pressure?..I was thinking the gear thingys that pull the nails were worn, but maybe not.
..just read your reply to D Man....great video..thanks again.
@@darryltaylor9916 Glad to help! The advice I gave D Man should get you started in fixing that issue. Thanks for watching!
my roofing gun fires 2 nails, sometimes, 3 nails. What should i replace? thnx
Very good
One of my Bostitch N66C siding coil guns pops when I put the air hose on it, It sounds like the cylinder is popping up to the top. How can I fix this?
Safco LLC Sorry for the long delay in this reply, I'm sure you have already resolved the problem at this point :-/
My guess would be that it's due to a worn Piston o-ring, the main o-ring seal on the Piston/Driver assembly. This, in conjunction with worn head valves o-rings, is probably causing the driver not to retract after the gun is fired, which is what you're hearing when you hook up your air hose.
I just found out that my brand new porter cable BN138 also is not working. this does nothing when pulling the trigger.