We have a new (to us) SP-15, no manual, sadly. The front rubber roller adjustment knobs very suddenly stopped moving. At all. If it were one side or the other, that would be one thing, but they are both immobile, and they had been turning fine earlier in the day. I removed the roller, and the two screws that are on the side, (without a schematic, I don’t have part numbers or names), thinking that one or the other might function as a locking screw, but that made no change. My thought was to soak the whole thing in mineral spirits, but I’m troubled by the fact that it happened to both sides at the same time.
I should also note that we are a community studio, and someone was renting the press at the time this happened. The user said she was just trying to raise the roller, and it didn’t turn the way it had 30 minutes before when I did it for her. I was not watching her make the adjustment, so I don’t know what happened prior to the freeze.
Any help would be most welcome!