Newell did not make Owner's Manuals for their coaches during the 1980's. I have posted a link
here to the Owner's Manual for my 1992 which you are welcome to download.
Most of the appliances and air conditioners were standard for their time but they are old enough now that finding manuals is difficult.
If you would list the model numbers for your appliances, etc, possibly someone here will have a manual they can copy or scan for you.