Thanks for your reply.
I'm not sure what I will do about the windows at this point. Pulling the lower panels does not give me access because there is a lip that the lower panels are spot welded to. I could cut the lip off but I think it serves to catch any water or condensation and keep if from dripping down into the walls. Don't want to remove that lip.
The upper hem will have to go. I'm thinking that I will use a cutting wheel and cut the upper panels horizontally just above the hem all the way down. Then grind and punch out the rivets, remove the cut-off pieces of roof panels from inside the hem, bend the hem open to allow access to the spot welds and then grind the spot welds. That should allow me to remove the hem.
I am assuming the hem is spot-welded? I'm starting to wonder. How would they fold the hem over the roof panels while welded to the bus? I would think they would form the hem, slip it over the roof panel edge, drill and rivet all together. Or, before the roof panels are on, tack weld the hem in place, buckle and insert the roof panels into the hem and the drill and rivet the hem and panels.
It's too much to write all of this down.
Can you answer whether the hems are spot welded or tack welded?
I'm a mechanical design engineer by trade. Also consider myself a jack of all trades. I don't know it all but not afraid to dive in. I saw pictures where someone just disconnected all of the wires from the panels on the bus and removed the panels. He then figured out which wires were still needed and removed those that were not. That may be how I will go. First I want a handle on what wires if any are required to run the engine.
I have only one battery in the battery compartment. Is it normal to have three? I was gonna put two deep cell batteries next to the one for bus electrics. Would like to know your thoughts on how many you think are required for the engine. Your bus is considerably larger than mine (26 passenger). You probably have a larger engine? I have the GMC 8.2 Liter (everyone is saying is a trouble prone engine - razz berry). I hope mine is not! I'd hate to put all this time and money into a lemon!
I just found a service manual on ebay and ordered it. It will cover the engine but don't expect it to cover anything else.
I just learned about how a diesel engine works (without glow plugs or spark). I didn't know they self-combusted! That should make electrics way simpler.
I'm working up my nerve to start disconnecting wires in the console. This could be a three six-pack job!
I'm not too far behind you in progress... I won't be taking down the ceiling panels. It will be fun to follow your progress. Keep going!
May have to stop in when we make our trip out west!