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Old 04-28-2016, 07:14 AM   #15
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Tiffin Owners Club
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Not all leveling systems have springs to retract the cylinders. Our '06 Itasca has Kwikee Level Best that used hydraulic pressure to both lower and raise the jacks. It did not have springs at all. A loss of pressure on the lower part of the cylinder that raises the jacks could possibly allow one to slip down.

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Old 04-28-2016, 07:52 AM   #16
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Our power gear jacks have no springs. The jacks are powered both down and then back up by hydraulic pressure.

The jacks lowering on their own suggests to me a loss of fluid and/or pressure. There's a leak someplace.

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Can't take it with you - don't plan on leaving any behind
2016 Newmar London Aire 4553, Spartan chassis
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Old 04-28-2016, 10:26 AM   #17
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This happened to a friend with a 2005 Tiffin Allegro Bus HWH hydraulic jack system. Luck for him he was able to pull over in time once the alarms started to go off. He raised them up and went on his way, no problems since. I was told either low fluid or a bad mother board will cause this, I do not know if that is accurate or not. Not a good way to spend your day worrying about that while traveling
2002 Holiday Rambler Imperial 40PKD
with Residential refrigerator conversion
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Old 04-29-2016, 03:26 AM   #18
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Had that problem on my F53 Winne. It seems the jack fluid expands as the Temps go up. This will push one of the jacks down just enough to turn the warning buzzer on. The cure is, when bringing the jacks up don't shut the controller off. Just let it time out. As I remember 2 or 3 minutes. This bleeds off all pressure and worked for me. I think this tip was in the jack manual.
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Old 04-29-2016, 09:17 AM   #19
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Most leveling systems can only be operated (hydraulic pump running) when an ignition interlock circuit is closed. I suspect that you have a faulty interlock and also a faulty leveling panel control board. The interlock may be on the panel control board. Get that fixed or replaced and you should be good to go. Call a customer service tech at your level system manufacturer and discuss the problem with them; they are usually great to work with.
Good luck.
Bob & Joan Alexander, 2010 Tiffin Phaeton 36 QSH, 2013 Jeep Wrangler (toad)
Lobo & Juniper (woof, woof)
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Old 04-29-2016, 09:22 AM   #20
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Originally Posted by Fred Cooper View Post
My coach has hydraulic power Power Gear leveling jacks, and may be similar to yours.

All of the Power Gear jacks that I have seen have powerful springs for retracting the jacks, and it requires hydraulic pressure to extend them.
Some of their jacks have the springs external, and some are internal inside the cylinder. I suspect that somehow, your jack system is activating while you are driving down the highway.

If you google "power gear parts and service manual for leveling systems", you will find links to several versions of their manual. Maybe one of these will match your system.

For now, I would pull the fuse that supplies power the the power gear system while driving, and reinstall the fuse when in the campground. This might allow you to get home before repairing.


You know, just plain common sense should dictate that ALL hydraulic jack systems should be made like that! JMHO

Joe & Annette

2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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jacks, leveling, leveling jacks

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