How do they jack up big coach when replacing tires?

ferndaleflyer wrote:
If the coach jacks can lift it to level it what is the difference if they lift it to remove the tires? My friends is sitting on the jacks right now while he gets the tires replaced!!!!!

Big difference. If you ever lift high enough to actually free up wheels to be changed jacks are extended way farther than I would be comfortable with. Compare that to minimal adjustments to maintain level at a CG and it's just not the same.