I have an air leak that I had asked about in a previous post. To follow up would it hurt anything if I charged the air system with an external compressor while I tried to pin down the leak? Thinking I...
Yes, some air chucks have a check valve between the chuck and tank.
If you have a schematic of your air system, you could very quickly tell if backfeeding would work.
From a design standpoint to be able to be successfully towed by a large wrecker, there should be a place for the wrecker's air system to connect to the coach's air system to keep the suspension aired up while towing. If you call Monaco, THAT is the one that would probably work best.