ANewSawyer
Addicted to ArboristSite
One thing I've learned is there are no stupid questions. But I'll give a shot at helping...
Is it just stuck? Rusted? I attached a link to a diagram, it looks like there might be a bolt or nut that holds the drum on? I sure hope this is the diagram for you saw.
http://www.mymowerparts.com/pdf/Hom...s-Manual-For-SUPER-2-Chain-Saw-UT-10520-A.pdf
There was a nut, which I removed.
I can move the drum back and forth about 1/8" it just won't slide over the threads. It might be partially coming off. Maybe there is a washer or something I am missing.
I suspect like Ginger said that the drum is stuck to the bearing and the bearing to the shaft. Put some penetrating oil in there and leave it for awhile to see if you can free it up.
The "S" type clutches do break but I don't know if that would cause it to jam the drum.
Also watch for this which is from the repair manual.
View attachment 558057
Lovely. Thanks fot the tip.
Edt: This is one of the last models of this saw. It is quite close to the last of production.