Sorry - few of us will be familiar enough with your coach to know what brand of seats it has. High end coaches often used furniture from Villa or the top-of-the line Flexsteel stuff. Do you know which you have?
If the seats swivel, there is usually a big nut underneath that clamps it to a spindle for rotation. If you can get a wrench on that to remove it and also unplug wires, the entire seat may lift right off. But often its a challenge to get at the underside without removing some panels and maybe the backrest.
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL