Heatmcalister,
First off, "What agent"? A salesman? In most coaches, if not all, leveling is handled on the "inside" of the coach. I've been around these things for a while now and have never seen where someone has to go "outside" the coach to handle leveling practices. Now, different year, model and makes setup the leveling practice in slightly different procedures. It depends on:
1. Who made the leveling system? HWH & Power Gear are the primary makers
2. What does the owners manual say?
3. Is the system Automatic or, manual or, both?
Now, I suppose there could be some sort of valve on the outside for some purpose of draining air etc. But, for leveling? Boy, that's a first for me.
A suggestion if I may here. If you live with a sloped drive way or the parking place for your coach is less than level, then a way more stable way of making it level while at your home is to "drive" onto blocks (tapered preferably) to get the coach PRIMARILY level, and then, use the leveling system (jacks) to do the fine tuning and, stabilization. You and, the coach will be much happier that way.
If you use the jacks only and, your situation is that unleveled, it creates undo stress on the frame/body/windshield/doors etc. due to the torqueing of the frame while it's trying to "tweak" that coach into being level. By driving up on some nice, heavy duty, solid wooden blocks, you're assuring the stability and sure footedness right off the bat. Just a suggestion.
Scott
Scott and Karla SDFD RETIRED2004 Itasca Horizon, 36GD Slate Blue 330 CAT
2011 GMC Sierra 1500 Ext Cab 4x4 Toad
2008 Caliente Red LVL II GL 1800 Goldwing KI60ND