Thanks. I see the fender and what I can see of the gears looks OK. The spring in the knob is present. I'll try cleaning before anything else. I'm thinking I could spray some radio/TV cleaner into the gears and see if that helps. And I'll see if there is lube on the edges of the front standard (the part that slides up and down.) If there is lube on it, there probably shouldn't be.
bob