Tom/Barb wrote:dougrainer wrote:Tom/Barb wrote:
We have the HWH system, hit the on button once, run the jacks down until they touch the ground, hit the on button again, the air will dump. hit the off button.
Standard routine with us, because we do not like our coach way up in the air.
Your HWH system does have a manual mode.
Sorry, you reasoning does NOT make sense. You state you do NOT like your coach way up in the air. But, doing your procedure is exactly what you do NOT want to happen. By lowering(extending) the jacks with Air bags FULL, will level the coach 4 inches HIGHER off the ground. Once the RV is level, you do NOT have to hit the Air dump button. The Air bags will deflate due to the jacks causing the ride height arms to move and auto deflate the bags. There IS a reason that HWH Auto/Computerizes systems DUMP the Bags FIRST, then level. Doug
Not true,, you can level the coach at any hight you like. run the jacks down until they touch. dump the air, and lower to any hight you like.
Lot less stress on the HWH system when running unloaded than carrying the coach up and down..
What Doug said is true. You're starting your leveling procedures at or near, 4" higher than you need to, due to your bags are still inflated and holding the coach at a higher altitude. If your "Auto Leveling" is raising the coach too much, then simply adjust it. It's about 5 minutes to adjust it. And you state: "Lot less stress on the HWH system..." Who cares about stress on the HWH hydraulic system? It's designed to take any "stress" you throw at it.
Those hydraulic systems are designed to operate at high pressure. The operate at a given pressure for normal ops then, when jacks are topped out or, a slide is extended to the max, they auto-open a relief valve. It's all normal. It's your coach and you can operated as you see fit. But, Doug's right. Your logic for not dumping prior to the Jacks touching the ground, means you start your leveling operations with a coach height, at least 3.5" - 4" higher than needs to be and, you say you don't like it that high, huh?
Scott
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
