Do both roller have the same toque to turn or same friction when turning by hand? Right one does not free spin like left one when spun with hand and let go. The right will turn when turned by hand but not free wheel as described above.

Is there a fuse on the motor as shown in wiring diagram? Where is it located, on the motor? What is the device on the motor that the wirirng harness clips to?

My motor stopped, smelled of electric burnt smell when I removed and held to nose. Could the roller beign tough to turn cause the motor to burn out. I would say it turns by hand but not fee wheels like left side?

What is the tip to get the belt back on the motor as it is a blind operation during re assemble?