I did what you said Jack.
I should say that the roller was on a couple of blocks of wood to keep it off the ground.
When I turned the roller sprocket, the roller turned freely with it in both directions. Surmising that the friction of dried grease from lack of use over a long period might have caused the rollers to turn forward together I applied a little resistance with the palm of my hand on the roller and turned the sprocket again. This time it did turn backwards relatively freely but engaged the pawls (made a ratcheting sound) in the forward direction. I take this as 'passing your test'.
However, after reassembly I played with the clutch to the point of being able to turn the motor side of the clutch freely without any discernible drag to the other side of the clutch and was back to the same problem that I originally had: locked up roller when pulling it backward. I'm scratching my head...
