Hi Disturbed and
Your coach originally came with several manuals since it is a conglamulation of many different systems. The Ford chassis, generator, A/C, fridge, furnace water heater, stove, microwave, water pump and a handful of minor applicances.
Look in the cupboards for a "buildsheet" that lists all the stuff Thor originally put into the coach. You can download the manuals for many items like the A/C, generator and fridge by going to that manufacturer's web site (not Thor's).
The Ford chassis Owner's Manual can be retreived from:
http://www.motorcraftservice.com/vdi...&menuIndex1=17
Double check the manufacture year of the chassis itself. Even though the coach is a 1997, it would not be unusual for the chassis to be a 1996.