Thanks Steve. Based on your comments, I have made minor revisions to the wording in my write up for others that might use it in the future to insure that others understand that the two solenoids for travel on the front and rear are to pressurize or dump the travel air from the ride height system. The ride height valves are actually two way valves that will either add air or release air based on the position of the horizontal level arm which maintains the correct distance between the body and the axle to keep the coach level with the pavement.
Tom is correct that there are a total of six solenoids per axle, two are for the ride height (pressurize and dump) and four are for leveling (one pressurize and one dump for the right side and one pressurize and one dump for the left side of the axle).
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