I have an American Coach Allegiance with a Power Gear hydraulic only levelingsystem. On my system, I dump the air, level and put the slides out, in that order...per the manual.
The problem appears to be once I remove my finger from the air dump switch, the air system starts filling up again. By the time I get level and the slides out, the air has raised the coach so than the front jacks are off the ground.
I tried holding the air dump switch down while leveling and putting the slides out, but that doesn't work much better.
Two other AC owners (with different model coaches) have told me their coaches dump the air once they push the "Auto Level" mode of the Power Gear controller to extend the jacks and does not start refilling the system until the jacks are brought back up.
Any assistance appreciated.