The owners manual is very specific about that. It states "DO NOT FILL TIRES WITH WATER OR SOLUTION MORE THAN 75% OF FULL CAPACITY".... I asked him that I would like to have a definite answer as to the proper level ...
My recommendation to correct the DEALERS MISTAKE is to roll the tire until the valve stem is at the 75% level; jack up the tractor until the weight is off the tire and then open the valve stem and drain tire to that level.