You need to remove chassis from the cabinet. Zenith 9S367 uses a belt to drive the dial. It might be broken? The belt is around 9 9/16" circumference, GC #138 or JFD #36. If you can't find these numbers check VCR repair stores. Some people make their own belts from large "O" rings.
Norm
:I was tuning my radio last night when the dial stopped moving when I was turning the tuning dial...What happened and how do I fix?