sequence of photos, part 2:
4771 slide the cage out the back. Note: there is a little wedge that is in the slot in the shaft and it will pop out when the spring comes out of the slot in the shaft. Don't lose the little wedge! You can see the wedge in a later photo.
4772 backside of the derailleur body
4773 back of the body and cage. Note the little wedge in the lower right of the photo. This is what was in the slot of the shaft, and held the spring in place.
4774 remove the nut from the upper pulley
4775 remove the shaft from the cage
Steve in Peoria