Jim Becker wrote:If you have a full pulley width of misalignment, the small stack of shims isn't going to be enough to fix it. Take close look at the Cub-22 pictures on the TM Tractor Parts web site to see where you may be off kilter. Here are direct links to 2 pages. By the way, the shims are on the mower flywheel shaft at each end, between the mounting brackets and the pulley or flywheel.
http://www.tm-tractor.com/gim/cub22_001.htm
http://www.tm-tractor.com/gim/22com_001.htm
Previous owners can do some wild things. PO of my sickle mower had a stack of several washers on that shaft. Perhaps not quite as thick as a pulley, but pretty close. Without pics, it's a shot in the dark on figuring out his problem. I agree that most likely something else is off kilter.