I have two craftsman nailers - 16 and 18 gauge. On both of them the end cap has cracked and now leaks air. I can’t seem to find replacement parts. Are end caps interchangeable between manufacturers? If not, what brand do you like ? Are all end caps made of plastic? I am a diy homeowner. Thanks.
Master Tool Repair, I very much enjoy your videos. I have a question. I have a Hitachi 90AE(S) framing nailer. When I fire a nail, its really slow to exhaust the air and reload the next nail. I do oil it regularly but do you think it needs a new piston? I didn't want to order unnecessary parts if it wasnt an extensive fix. Thank you in advance for any help
Thank you for the watch and for the question! I would say first to make sure you have enough pneumatic oil in the nailer so that the cylinder is not sliding up as fast as it should be, and that you're using the correct oil. This may be obvious, but I need to state that. It could also be that wide rubber band "check ring" around the main cylinder in the body of the nailer is defective, and has lost its stretch. That is the first thing I would check. It may be necessary to replace all of the main o-rings in the cylinder, piston and head valve if you can't find an obvious problem, but the cylinder band I mentioned above is the cause of this problem a lot of the time. I hope this helps!
Thanks for the info. Yes I am guilty of being a weekend warrior. I have the Hitachi-Koki NV82A2 which I just took to the shop for O ring replacement. I set the air pressure and it would not cycle. The driver repeatedly remained out and I had to gently push it back in. It is possible the gauge on my compressor is reading low and maybe I am overly careful. I have a number of Hitachi guns, but now that I know, anytime I turn on my compressor I will cycle them all.
Thank you for the comment! Yes, your pressure gauge could be inaccurate and giving you a lower PSI reading that it should be. Once you rule that gauge out, I would confirm the cylinder seal is in good shape...sometimes this is not included in an o-ring rebuild kit. It's the seal right on top of the cylinder that butts up against the head valve. Also, make sure the inside of the head cap is not worn badly. If you replace the cylinder seal and all o-rings on the nailer and this still happens, most likely it's one or more of the "hard" parts that are worn down (head valve itself, head cap, etc.). Hope this helps!
Thanks for reply. The repair man at the shop, who replaced all the seals and O rings, said that I was not using enough oil. He says that a few drops is not enough. OK so maybe on finishing guns, because they would spray oil on the woodwork, put a little less oil. He said it is always better to use too much than not enough. Also he said that the O rings should not roll but rather slide. Apparently the inside of my gun looked gummy. He said that after putting the oil inside, sure you can cycle them once or twice, but try to store them- handle up. I am going to watch your video all over again.
@@松田もしくろす That is correct, it is a good idea to store the gun handle up. It's not necessary to use more than 4-5 drops of oil in the nailer, honestly. We have been doing this in our shop for years without a problem. If the nailer was gummy inside, however, you probably do need to add more oil. Hope you get it back in working order again!
Can u tel me I have a porter cable framing gun spraying though and the trigger a little piece of metal on the inside with a safety lock is it's red I cannot get that off so I can replace the little piece of metal that goes up from the Trigger 2 a little plastic piece in the spring and makes it shoots now and I rubbed lock is stuck on there so I can't do nothing do you know any way to remove that
Since I don't have your model# or the nailer here physically, it would be best for you to call a technical rep at Porter Cable directly. You can reach them at 1 (888) 848-5175.
@@janmartens7954 We're using standard pneumatic tool oil. It doesn't need to be brand-specific, either. You can obtain this anywhere nail guns are sold.
Thanks for the comment! If the driver shoots as soon as you hook up the air hose to the gun without even touching the trigger mechanism, it's usually a problem with the trigger o-rings. I would remove the trigger stem and related parts to see if the o-rings are damaged or dry. If the o-rings look nice and round and aren't obviously damaged, you may just need to lubricate the o-rings and reinstall the trigger components. If that doesn't take care of the problem, the issue is with the Cylinder Seal around the main Cylinder in the body of the nailer. You'd have to remove the Head Cap, then remove the Cylinder itself to see if the larger rubber band (about 1" wide) is damaged. Many times times, new O-rings and a new Cylinder Seal will take care of most nailer problems, including this issue. I hope this helps!
