ACME Dash AC help

[NeptuneGator]

Anyone know the best way to access the expansion valve on a 2002 Tiffin Allegro Bus Freightliner? Should I come at it from inside or from the generator access?

Any idea on where the sticker that shows how much refrigerant the system holds is located?

[BFlinn181]

The evaporator is the 'radiator-like thing' inside the HVAC plenum. The expansion valve is usually located near the evaporator, in a line right before it enters the plenum. It should be 'under the hood' above the generator. I had a dual A/C in a van go bad when the filter broke down and filled the system with fibers, blocking the expansion oriface. It was a very expensive fix, I decided to trade it rather than get it repaired.