OK, all you wood burners out there, WTF is going on here. Wood store is an antique 1890-1910 King circulator an oval upright barrel of red Russian iron (so called) with cast iron top, bottom, door. Our pipe goes up one (3') section of 6" pipe & elbows to the left for 4 sections (all riveted together) where it goes into a masonry chimney through a round liner thimble.
Last year, the dampers stripped out so the handle would spin but the damper plate was jammed closed. This year, my wife complained about my closing down the dampers but since she's lugging wood & tending the fire (I have trouble with my legs on the stairs so if she wants to be in charge so be it!). I haven't even gone down stairs or if I did, I put the dampers back as I found them. What I've found is the bump in the damper handle is now in the groove, instead of up against it, locking it. Sooo the handle is in too deep, the springs have no tension against the pipe & the damper moves when it feels like it. WTF!!
At least this year the handle is moving with the damper... We're now parking old horse shoes as weights to bind the handle so it doesn't self adjust.
This is just crazy. My only thought is the cheap China steel (recycled WW2 bombs?) is bending under the heat of the fire allowing the parts to slip out of position. How do we stop this from happening?