Re: replacing the alternator
105 is about the smallest amperage version of that alternator. It's easy to find a new alternator,,,ebay has them really cheap. The leece neville is very common on big trucks and buses. Some only require 1 wire, while others require 2. IF you're bus is set up for 2 wires currently then it makes no difference which alternator you end up with. You're local alternator shop can rebuild the one you have, but i've found that ebay is a cheaper solution, if you're not in a hurry.
I like more power from my alternators....165 amps is a good amount....i think they offer all the way up to like 300 amps, but that's getting a little silly. What size aternator you want depends on what kind of electrical loads you're gonna have. I like to have a 2kw inverter, so bigger alternator is better. Running the 5 standard blowers for heat/defrosters in a bus, plus the stock headlights is gonna require most of that 105 amps.
swapping the alternator is a very straightfoward process. might as well buy a new high quality belt for the alternator/water pump while you have the hood up.
Quis custodiet ipsos custodes (who will watch the watchmen?)