Glad you got that handled, I'm late to the party but if your new to this coach and not familiar with air braking system I would suggest taking the coach to a heavy truck dealer, like Freightliner, Mack, International etc... and get a full FDOT inspection. Most dealers have a flat fee for it and you'll get a checklist showing brake condition, check for air leaks, chassis suspension wear etc.... points that a normal "oil change" at speedco or the like will not provide.
A very inexpensive piece of mind.
1999 American Eagle
ASE med/heavy certified technician
ASE advanced diesel certified