Learn how to disassemble the Marlin 336 lever action rifle and the many variants from a professional gunsmith from Brownells. A video is so much more effective when it comes to learning how to do something. I’ve read many gun manuals but when I watched a video, it was much easier. Once you remove the bolt from a lever action rifle, you can clean the barrel from breech to muzzle just like any other rifle.
*** It’s always a great idea to own a set of Gunsmith Screwdrivers when performing gun maintenance.