My Senco SFN1 finish nailer will not shoot a nail. When the trigger is pulled air comes out but no nail is shot. Thanks,Steve L

There are 4 main causes usually with this tool:
1) Check the seal in the bottom of the cylinder (under the bumper) #BF0070 (#12 on the breakdown) If this seal is missing or worn the piston will not always return fully.
2) The pusher spring #GD0253 in the magazine is not moving the nails forward
2) The driver is bent or the tip is worn / chipped
3) The check valve ring #LB0077 on the cylinder is not sealing properly
Let me know if this helps Senco SFN30 15 Ga Finish Nailer Parts

Your driver is not returning fully.
Most often this is caused by:
1) A bent driver blade - pull the driver out and inspect it, make sure it is straight.
2) A broken seal o-ring on the bottom end of the cylinder (#66)

Senco SFN30 15 Ga Finish Nailer Parts

The SFN1 is a great nailgun, built for professionals, and is pretty much indestructible. It's air leak is most likely an O ring that is worn out. While it is theoretically possible to figure out which one it is, and replace it, the smart move is to have the gun rebuilt by an approved service tech. I usually pay about $60 to have my SFNs gone through. My oldest SFN1 is 18 years old, and it has only been rebuilt once.

I have a senco 3C0001N the nail doesn't come out.

Sfn1 is an oilless nailer. It needs about 100psi for full power. If oil has been used in the gun or if oil is leaking out of compessor and making its way into the gun, the rubber firing valve could swell preventing it from working correctly. The firing valve sits on top of cylinder (black plastic). If the driver is bent or piston fits too tight in the cylinder you will have similar problem. The piston/driver should move easily down cylinder (but not slip down under its own weight). Finally, the nail will not be driven all the way in if the tip if the driver has broken off. Good luck with your repair.

Sounds like the bar that slides down to push the nail is jamed you should disconect it from the air and check to make sure a nail is not stuck you should be able to look at the gun and see how to disasemble it in the front end to release it once that is done try some white grease on the part befor you reasemble it

I just had the same problem with mine. Exact same symptoms. My guess is that your gun hasn't been used in a while.

I called Senco and they recommended removing the top cap, removing all o-rings (one at a time) gently stretch them, put a small amount of lithium grease in the o-ring track, and replace the o-rings. This fixed my problem and I hope it fixes yours!

Senco has awesome tech support for their tools. I will not buy another brand because of their support. 800-543-4506

Do you regularly use air-tool oil placed in the air connection? If it gets a good workout every day, buy an 'inline' oiler that is inserted into the air line which automatically takes care of oiling. Hope this helps!

The kits for the senco guns, have all the o-rings and seals needed to stop most leaks, no hard parts. You have to replace all of them, no oil is needed, but it needs to be clean, some have little tubes of grease for the o-rings. I'm sure the other guns are the same way. Some of them will give you a fit. I had a senco sfn1, totally rebuilt, still leaked, tried it again, still leaked, called senco, they said send it to us, they fixed it for free, but never said what the problem was. Some times the triggers go and you end up building the whole gun for nothing, and the trigger still leaks, they are the toughest to spot. I have seen a lot of complaints about paslode. We tried them all in our shop, and the senco was/is the best, So we fazed out all the other guns and kept the senco, so all the nails were from 1 dealer, all the parts, we weren't looking all over town for a box of staples.

the 601 had a design flaw, in the nose, where the nails hit as the are being pushed forward, the peice was made out of a peice of metal that was too soft, it wore down and that is where you get the double nail problem.

Senco offered a trade in, this was years ago, for a limited time and gave us credit towards new guns, which we gladly did