Thanks guys!
Lew, yes I do have a black walnut tree. I also have a couple pecan trees, but they must be male, as I never see many, if any pecans. I wish I could figure out this one tree though..... don't know what it is.
Lew, do you know anything about this sweeper? I can't find any parts pics on Cub Cadet. Lance figured out it is the same as a Parker TE-7736, and I can find part pics for that. Says the Cub Cadet model number is 193-366-100, but nothing comes up. I assume it's an early MTD deal, because the SN has a "U" in it like IH. If they did the SN's the same as everything else, it's early. Last 3 are 901.
Oh.... it had the owners manual zip tied to the frame tube for the bag..... not much left of it though... I found one on ebay for $3.