Fixing a Porter Cable Finish Nailer
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- čas přidán 18. 08. 2020
- Fixing a Porter Cable FN250 finish nail gun. The bumper was in pieces and the part was discontinued with no replacement. I had to make a new bumper, replace the valve seal, and install an o-ring kit. See the links below for the parts and tools I used:
O-Ring Kit (some o-rings didn't fit my gun):
amzn.to/2P45l9D (affiliate*)
Valve Seal (883919):
amzn.to/2BLvl6E (affiliate*)
Bumper (651874-00, requires modification!):
www.mmtoolparts.com/store/dew...
*Purchasing from these Amazon affiliate links earns my channel a small commission. Think of it as a tip that doesn't cost you anything. Thanks for the support! - Jak na to + styl
O-Ring Kit (some o-rings didn't fit my gun):
amzn.to/2P45l9D (affiliate*)
Valve Seal (883919):
amzn.to/2BLvl6E (affiliate*)
Bumper (651874-00, requires modification!):
www.mmtoolparts.com/store/dewalt-bumper-651874-00
*Purchasing from these Amazon affiliate links earns my channel a small commission. Think of it as a tip that doesn't cost you anything. Thanks for the support!
Kudos on the content and format of this video. I really appreciate the fact you didn't bless us with endless chatter about what we could plainly see on the screen.
I have this same finish nailer, that after years of good service came back from being loaned out no longer working. I'm going to disassemble it and lube it. But if I can no longer get parts, I'm going to junk it and just get another one. It gave me 15 years of good service. I've got too many half finished projects to try to recreate parts as you did here.
Glad I found your video before I tore it apart.
Yeah, I really almost gave up on it but then it turned in to a challenge just to see if I could do it. :) I appreciate the positive feedback on my video format. Thanks for the comment!
Thanks for a very helpful video. I've got the same nailer needing similar repairs. You've given me the confidence to fix it!
I probably could have done a nicer job modifying the bumper, not sure how long it'll last. Thanks for the comment!
Omg ... impressive! Good work!
Thanks, I appreciate it!
Well I’m at 65-year-old finish carpenter and I would have to read this with great workmanship and I used to have one of those nail guns finish guns and I have myHitachi finish Nailer and one broke luckily I had an extra one same thing and spinning air I forget where I have the top or something and the stem is not shooting the nails so I’m guessing it’s similar to the porter cable I had a part a couple times I guess I’m going to take it all apart again but I think your video was great I like your workmanship and you tried and tried that’s how I am I will try and try and try and talk it’s just not gonna happen so you really tried and tried to even come up with a whole Nother video for people who have that now gone of how to fix it if they reach into that point you’re not withParts unavailable but great job😊
I really appreciate the kind words, thanks for the comment! :)
Thank you for this video, I have the same problem with my nail gun and I will try your method .
Let me know how it goes!
This is the most complete video I've seen on a FN250 rebuild. Having just completed a FN250A rebuild - thankfully the parts are available for this model - I learned that using a light grease (I used Luberplate) when reassembling the gun made the difference between success and failure. Although, I should mention I did not replace every O-ring as the Porter Cable rebuild kit for the FN250A was $99 versus buying selected O-rings from the parts diagram was about $40. Using a parts diagram to reassemble the gun is extremely helpful. I'll note that it appears - according to the FN250A parts diagram - that the rubber bumper at the base of the piston, in this video, was installed upside down.
I've only done a few nail guns but, so far, I've always been able to find aftermarket o-ring kits for $10-$20 and I just use air tool oil for reassembly which seems to work alright. Do you mean the large black bumper (installed at 17:26)? You had me worried, I had to go back and re-watch the video, but I did install that one in the correct direction. The tapered end points towards the rear of the gun while the flat end faces the front. Thanks for watching!
Remove small o-rings with o-ring spoons. They're like modified picks by flattening the end, rounded over and made slightly concave.
Yeah, I've seen those but I haven't picked up a set yet. :)
@@Mikeattempts It took a few nicked o-rings and scratched grooves before I got a set.
@@ronyerke9250 Yeah, they definitely look like the right tool for the job.
The parts diagram for my FN250A shows the rubber band ring #125 floating near the bottom of the cylinder, but not where it should be located.
I looked up the parts diagram for your gun and it looks like part #125 is supposed to be installed with the ridge facing the rear of the gun.
Thats great same problem on my fn250c
If you end up tackling it, let me know how it goes! :)
Okay, thanks. I used air tool oil because that's what I had in stock. Now, my Fn250A is back together after fixing the top end by replacing the broken piston stop. No more leaks from the top, but the drive pin is not retracting. Did I do something wrong or is there another part to replace?
I'm no pro but I would double-check all seals and O-rings. A stiff seal or a damaged O-ring could be most likely causing your issue.
Awesome
Thanks for watching!
I may have installed part #125, rubber "O-ring" band, in the wrong position on the cylinder #124. Where should it go?
See if you can find the parts diagram for your gun, it'll show the correct orientation. If you have trouble finding it, let me know.
My porter cable is an FM 250 B when I press down on the trigger and then the front it’s sporadically works. What could that be
Hmmm, I'm no pro so I'm not sure but are you saying it only drives a nail after a few tries? It's hard to say but it kinda sounds like a feed issue. Just make sure everything is cleaned and lubed and maybe try some new nails
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
Have you tried this page: www.harborfreight.com/parts ? There are a couple part list PDFs and a phone number on there that you can call to order replacement parts. You might have better luck, but I've often found that the tradeoff for less expensive tools is usually a lack of replacement parts. They don't want you to fix 'em, they want you to buy another one. :) Let me know how it goes!
@@Mikeattempts central pneumatic-mostly compressors. No my nail gun is not there. I hope smn will tell me, that this is the same tool under different name, and what parts they use for it.
Mike, I am trying to fix a small brad nail gun but inside it has hardly any parts. Can you please tell me how the nail hammer plunger part lifts back up after the nail has been nailed in? If the gun has no other holes in the tube, how would the plunger move back and ready for the strike? Your nail gun in this video appears to have holes in the cylinder . Mine is very basic and has just a plunger inside a cylinder . There was some type of disintegrated seal where the spike went though the cylinder but I was unable to work out what it did as it was so crystallized and virtually powder.
That disintegrated piece was most likely a bumper to provide a bit of cushion so the metal parts weren't slamming in to each other. I'm no pro and every gun is different but, from what I understand, there are channels for air to push the piston back in to position. Even though there aren't any holes in the cylinder, there's probably a way for air to enter and the end of the cylinder, towards the front of the gun. The best thing to do is to get a parts diagram for your specific model and figure out what's missing. All of those pieces of broken plastic could be 2 separate pieces, not just one. Order replacements parts and an o-ring kit, put it all back together, and you should be good to go. Thanks for watching!
@@Mikeattempts
Mine doesn’t even seem to have the bumper stop. What does that part do Mike ?
@@Dentinvent The bumper just acts as a soft stop so the pieces of metal don't slam into each other. There's a chance yours did have a bumper but it just shattered into a bunch of tiny pieces. That's where the parts diagram comes in handy.
@@Mikeattempts
I couldn't find any on line parts or info. Maybe the crystallized bits were teh bumper. Anyway i wasted too much time trying to work it out and even opening a working nail gun wont help me here as the design would be different.
Giving up on this repair for now.
@@Dentinvent If you give me the brand and exact model, maybe I could help you find a parts diagram.
I have a BN200 porter cable Brad nailer that the driver doesn’t return up.
I have replaced the driver and some o’rings. Even tried filling down the driver guild because I felt some burrs on it. But still won’t work.
Any ideas??
Thank you
I'm no pro so it's hard to say. There isn't much to them so the only thing I can think is that there's a blown O-ring or seal. I would just replace all the O-rings and any broken or stiff seals, and it should be good to go.
Okay. Thank you for your response.
I will replace I thing there are 3 orings left. 2 on the trigger n one on the aluminum housing that holds the driver. I did replace also the driver guide as mine was all busted up.
Let me know how it goes!
Was the bumper in the second attempt epoxied?
Yep, there was epoxy under the bumper but none on the spring side. If I had been able to get the proper bumper, I wouldn't have used any.
@@Mikeattempts thanks. God damned frustrating that I take care of my tools but they just disintegrate.
@@billgerhardt8853 Yeah, I get that these bumpers and seals take some abuse but you'd think there would be a better material they could be made of that doesn't get brittle and shatter.
look at all those glorious metal internals. Hardly a plastic part in there.
Yep, it's just a shame you can't get some of the maintenance parts anymore, but I guess you can't expect them to be made forever.
I baughtthe nais from princess auto it worked first then would not fit in dispenser
This nailer takes different sizes and you always want the tip of the nail as close to the front of the magazine as possible. Thanks for watching!
Mine leaks from the bottom of the air chamber housing. What do I need? HELP
You mean, at the bottom of the handle? If so, you probably just need to remove the air fitting, clean it up, and reinstall with new teflon tape or thread sealer.
Thanks so much for your reply. Mine leaks at the bottom air chamber housing where the pin comes out to drive the nail in. Not leaking at air fitting.
@@gibsonguy5240 If it's leaking out of the same hole that the driver comes out of to drive the nail then there's a damaged O-ring or seal inside that's letting air get past. You'll need to open it up and, at minimum, replace the bad seals and damaged O-rings but you might as well just get an O-ring kit for your gun and replace 'em all while you're in there.
@@Mikeattempts Ok I'll give it a shot. Thanks!
What type of lube?
I only use air tool oil, the same stuff you drip down through the air plug before attaching the air hose.
Ebay has the head valve seal and bumper for them, atleast one of them is unfortunately from China tho, just ordered them
That's great, I looked everywhere online for that bumper during this rebuild but no luck.
I ordered the parts last night mine is FN250B letting you know in case it's not the one in your video cause I already forget, last year I had to replace a diaphragm (I believe) in the smaller brad nailer or maybe my stapler again I forget witch one, it seems these porter cable have time limits on the plastic parts, not completely to do with amount of use, my 3 piece set is about 15yo but very lightly used. Thanks
@@johnpower8356 Ah, mine is the FN250 (no B) and the bumpers are different. Yeah, you're right, the polyurethane seals and bumpers get brittle over time even with little use.
I found the bumper on Amazon it was 15 dollars
Nice!
It's a damn shame these manufacturers don't keep stocking parts to the tools they build and sale. If they don't want to continue to stock the parts to their products they sell, they need to make the tools with parts that don't wear out! It's awfully cheesey and discourages me to buy any of their products again! There should always have replacement parts available.
I couldn't agree more. Especially something like a bumper, they should be able to use the same part across multiple models. Thanks for watching!
Jazz improve piano
I think maybe this comment was meant for another video? :)
In short. Just buy a new 60 dollar nailer.
Hahahaha, exactly! It was a nice challenge though.