I have a 1999 Country Stoves C160 Striker, pre-Lennox wood insert. The damper is a sliding device in the front with a push/pull rod protruding from the side. Sometimes it sticks. Does anyone know how to service this device? I would like to clean and lubricate it. Does anyone know or have a diagram of the parts in there? It sounds like there is a ball or detent of some kind. No obvious openings are visible for external access. I'm not even sure where it is pulling combustion air from. ~John