Okay. I cleaned further. Did some judicious metal on metal drops of oil and cleaned the foot pedal. Now it's stuck. LOL!
When I manually turn the wheel clockwise (to the back) everything works smoothly. When I manually turn the wheel counterclockwise (toward me), the metal belt with the tracks gets stuck at about a half turn.
When I plug it in and add power, the little rubber belt runs, but the belt with the tracks doesn't run.
If I push the little black device (see photo) toward myself (to the left) and turn the wheel counterclockwise, the catch on the metal track is relieved. [ATTACH=CONFIG]541803[/ATTACH]
Ideas?