Originally Posted by TQ60
If so check that system first.
No mention of hearing leaks so assuming none.
If you have air leveling and need to drive try manual mode to raise unit to ride height then pull fuse to insure it does not activate and try to relevel.
If at home then get copy of troubleshooting guide for leveling system and follow it.
Sounds like it is causing issue.
This is why I like jack based system as the factory chassis is left virgin...
No, he does not have "Air leveling". He has the exact same system that we have. It's the HWH 625 Computer Controlled Automatic Leveling System. It has two forms of dumping. One is controlled and or used by HWH and, the other, while on the same control panel, is the Freightliner dump system.
The one that HWH incorporates into its automatic system takes effect when the operator pushed on the Power button on the HWH panel, TWICE. It then starts the dumping of both the front and rear bags. It does this for approximately 20-25 seconds, plus or minus. At that time, it begins to lower the appropriate jacks, depending on what YELLOW lights are appearing on the panel, indicating what side and or, end, is low.
Once it's leveled the coach with only three jacks, it will deploy the fourth jack. Once that fourth jack has touched the ground and, raised the coach by approximately 3/4" to 1", the computer is satisfied that all leveling is accurate and shuts down the leveling system. That's the AUTOMATIC MODE.
In the manual mode, just like in the Automatic mode, the key is in the ACC position. The power is turned by pushing the power button ONCE. Then, there is the dump button that controls the Freightliner dump system. You push it one time and, the bags are dumped. Once all the air is depleted from the bags, you can then MANUALLY deploy all the jacks to the needed positions.
Now, when it comes time to get ready to leave, at least in our coach with the same system, all I do is, start the engine, turn on the HWH panel, and, hit the STORE button. At that time, the jacks automatically start to retract and, the bags begin to fill. Now, this has always appeared to be happening at the same time. I have never noticed if, the jacks actually have to be in the fully raised position, satisfying the computer by closing all four of the jack sensors, prior to re-filling the bags. I'll have to check that to make sure.
But, to the OP, that's how my 625 system works. I have a friend who's used the theory of, "start the engine, put it in gear, hold on the foot brake, release the parking brake" and re-apply the parking brake. And, that has worked for him each and every time.
In fact, it even states in the HWH service and troubleshooting manual that premature releasing the parking brake, will trigger the HWH system into refilling the bags and, retracting the jacks but, IT IS NOT RECOMMENDED to do it this way. You see, there is an interlock ground that is applied to the HWH system from the parking brake to allow it to work. Once that interlock is removed, the HWH system reverts back to the STORE system.