
Originally Posted by
chrisdavis
If you can open the side and gain access to the sprocket. check to see if the shaft has a key (there will be a slot where a little rectangular piece of metal goes). If it is keyed make sure the key is still there. If it isnt keyed, hit the open button, and see if the shaft is spinning around inside the sprocket. If the shaft is turning and the sprocket is not, you need to tighten the set screws on the sprocket, there should be 2 about 90 degrees apart.