Did the Nailer just stop shooting nails ?
They should not need any maintenance they are made so you dont have to do this, it sounds like you might have a jammed brad in the gun, Anyway you can go to Sears.com They have all types of Manuals for Craftsman products and you can download them right to your Computer they also have illustrations and a step by step guide for trouble shooting problems like the one you have with your gun.
Let me get back to you in 10/15 minutes, please and Thank You
Sorry about that. Here are a few Sites that i use to get Stuff/Manuals when I am looking for something Specific and cant get them anywhere else. (1) Nailzone.com (2) alltradetools.com and (3) grizzly.com/images/manuals. Hope these will help you out.