Tom/Barb wrote:
Another good reason to put the jacks down prior to dumping the air.
There are some coaches/chassis/makes and models that AUTO DUMP prior to allowing the Jacks to be used. Ours being one of them. It's an '04 Itasca Horizon 36GD with the C-7 330HP CAT. When I hit the Auto-level button, the HWH control center takes over and dumps the air for me. Then, after about 20+ seconds of dumping, the jacks will begin to deploy, normally two side ones first, then two end ones, then the final one for stabilization.
As for the OPs statements, many, many coaches drop quite a bit when the bags are either manually dumped or, the air systems in those coaches just leak down and will have the same result, a drop in height. As has been stated, many, many diesel pilots will automatically center the wheels as they final park for a camp spot or, parking at home or, where ever and plan either on leveling or, parking for quite a while which, also as stated earlier, the potential for leak-down is high and so is body drop. Then, when the coach is started, the air system will auto-air up IF, it was not place in the level status when previously parked.
If it was placed in level operations, then when started, it will not begin to rise in height until the asked for by the drivers operations. On my HWH control panel, it has a "Store" button. I must push that in order for the air system to begin to fill the bags and, the jacks will auto retract and, the coach will rise.
Scott