Tools, Sharpening and Power Machinery - Problem with Senco Airfree 41 Cordless Nailer

I bought myself a used Senco Airfree nailer from a pawn shop for $50, figuring I could sell off the batteries and charger if I couldn't get it working. The gun appears to be in decent physical shape, but it won't fire.

When the trigger is depressed, it makes a small electrical noise then it's silent and doesn't retract the firing pin or fire the nail.

I opened the gun up and found that the springs attached to the trigger and the contact tip weren't where they were supposed to be, and thus had the contact tips continually pressing the electrical contacts. When I placed these in their correct places and reassembled the gun I had the same electrical noise with also a slight movement inside. When I opened it up again and observed what happened when the trigger was pressed it appeared as though the motor started and attempted to turn the crankshaft and bring the firing pin back into the cylinder, then immediately stopped and went dead.

Has anyone observed this kind of behavior before? Is it merely a dead motor or am I dealing with something more complex? I appreciate any and all advice/suggestions. Thanks!

If you had looked a little further in your exploratory surgery, you would have found, as I did yesterday, the drive cable(s) have broken, probably at the attachment ends. Once you energize the motor, the drive belt turns the mechanism inside, and "cocks" the drive pin via these cables. I've got to take mine in for repair in the morning. Good luck.

I have encountered the same problem and took it to a Senco repair shop. they claimed that the whole inside unit had to be replaced (over 165.00). Did they tell you the same thing? Did you get it fixed?

Thanks
7500feet

I live in a small sleepy area of North Georgia, where everybody knows everybody, so I took mine to our local hardware store where one of the guys does the factory repairs for many of the compressor and nailer manufacturers. Senco told him there may have been a manufacturing defect in my unit, and the repairs would exceed the cost of a new unit, and to make me "happy", since I was such a "good customer". He handed me a new Dewalt 18 volt angle nailer, and said Merry Christmas. I was floored. The Dewalt has been error free for all these months, and I use it almost every day, where a compressor is not available (or I am too lazy to hook it up). I paid about $160 on Ebay for the Senco, and the sticker on the Dewalt was nearly $400. I feel really lucky.