The manual for the coach itself is a generic one from National RV (no longer in business). It is not a lot of help. What you really need are the individual manuals for the major components, e,g, the Ford Chassis owners guide, and manuals for the water heater, fridge, furnace, a/c, etc. Get the make and model of each thing you need to know about and search the web - you can often find manuals on the component manufacturer web site or by calling/emailing them. Or ask other RVers if they have the same models and could you copy theirs. There are only a few brands and modls of the major systems and so many Rvs have the same or very similar stuff.
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL