Welcome and Congratulations!
I doubt you'll find a manual from Midas itself about the "total coach" but don't despair. Any I've seen have been so generic that the part you're interested in might be totally wrong about your model.
You CAN get Owner's Manuals and in some cases Service Manuals at www.bryantrv.com. That's our tech guru Chris Bryant form DeLand FL. Your roof A/C, fridge, water heater, furnace, TV antenna, monitor panel, all generic from a few common suppliers.
If it's on a Ford E350 with 460 engine and C6 transmission, it's a good horse.
Be sure the brakes aren't stuck (front caliper pistons/slides, rear cylinders/adjusters) and the brake lines and hoses are good. Be sure rear brakes are adjusted. The Haynes Ford Van shop manual is pretty good for those.
Be sure the body doesn't leak. RV shops'll do an air pressure test for about an hour's labor, probably $100 or so.
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB
Can't help on the manuals, but I just love to see a mention of a Midas. Our first Class C was a new 1976 Midas built in New Tazewell, TN just up the road from Knoxville, our hometown. We visited 47 states over 21 years with it.
Awesome congrats! On a manual that old considering most manufacturers probably didn't keep them on PDF etc, you may have a real hard time finding it even from the manufacturer.
Remember it's 27 years old. Just ask questions! Lot's of help here. & congrats again!
4 whopping cylinders on Toyota RV's. Talk about great getting good MPG. Also I have a very light foot on the pedal. I followed some MPG advice on Livingpress.com and I now get 22 MPG! Not bad for a home on wheels.