You felt vibration when you pulled the pump lever ~ a good s
The belt is stuck, but it's there. Wait for help to get the machine in its back. The pulleys and belt are small and toy-like--very agile. Again, if you don't have help, remove the wringer first. It is heavy. One hand on the left, one and the right, and lift-off. Once that's done, laying the machine down is easy. Get behind her, and grab her from the back of the tub, and pull slowly. Next, work those pump parts and you'll be draining away in no time.
It is a really cool pump, is very quiet and makes excellent gurgles at the end. The impeller is so close to the port in the tub, that you can see the tiny blades through the grate, in good light, when they're whirling.