The 18 HP opposed twin has been moved to the the 14.5/42. So has the seat. The front tires went to the 14.5/42 and the rears to the 18/46. The gas tank is temporally on the 14.5/42 but does not really fit.
The transaxle has a worn axle bushing.
The transaxle input pulley is wobbly. I don't know if it is the bearing that supports the input shaft or the splines on the pulley.
If it were not for the fact that this tractor has a hood I would junk it for sure.