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Old 04-19-2016, 10:03 PM   #1
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Leveling jacks extending while driving

Driving east on I 40 I heard a draging noise , stopped to find one rear jack in contact with ground and 2 front jacks about half down. Jacks would not retract or move at all. Realized hydro pressure and front jacks came up had to pry back one up
Any ideas, I'm stumped. And a long way from home
Richard
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Old 04-19-2016, 10:31 PM   #2
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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.

Fred
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Old 04-19-2016, 10:42 PM   #3
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It could be the solenoids are not sealing properly for the ones that went back up easily, or the interior seals are bad. The back one that would not even pry up could be a bent shaft or faulty solenoid, or remotely-a blocked hyd line.
I'm assuming you have HWH hyd jacks, if so, call their help line for expert suggestions. You will find useful information in the HWH FAQ webpage.

How long since you've cleaned the jack pistons and the seal surrounding it?
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Old 04-19-2016, 11:34 PM   #4
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The OP originally had two posts, almost identical, but one stated Power Gear Leveling System. The duplicate post has disappeared.
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Old 04-20-2016, 08:31 AM   #5
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I'm not sure how the jacks could extend without the hydraulic pump providing pressure. The springs should be strong enough to retain them in the retracted position even if they aren't strong enough to retract after use.
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Old 04-20-2016, 08:56 AM   #6
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It would appear that there is electrical problem - Hyd pump must be running and down alarm not working because that signals auto retract. I too would unplug power to the pump till problem found. Maybe bad controller?? I would like to hear what you find.
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Old 04-20-2016, 10:57 AM   #7
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Disconnect the power from the mechanism until you sort it out. You can reconnect when you need it. This will hopefully get you home.
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Old 04-20-2016, 11:10 AM   #8
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Old 04-20-2016, 11:43 AM   #9
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Check to see if you have a manual handle to pump the jack.

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Old 04-20-2016, 12:13 PM   #10
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If one jack came into contact with the pavement while traveling, you can bet that the jack is bent.....probably the reason you had to force it back up.

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Old 04-20-2016, 12:29 PM   #11
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Quote:
Originally Posted by r oliver View Post
Driving east on I 40 I heard a draging noise , stopped to find one rear jack in contact with ground and 2 front jacks about half down. Jacks would not retract or move at all. Realized hydro pressure and front jacks came up had to pry back one up
Any ideas, I'm stumped. And a long way from home
Richard
Well Richard,
As has been stated, it would be nice if you provided info such as coach make/model/year/type and, type and make of your leveling jack system, i.e. Power Gear, HWH, Lippert etc. That way, folks with the same brand of system, who have had maybe the same problems, can point you in a direction that would help in your situation.

Second, I'm not sure about any other system other than what we have, the HWH system, but ours has a failsafe built into it to prevent just what you're describing. I can't remember the actual part but, since hydraulic oil CAN HEAT UP while you're traveling, it will EXPAND and, it will cause partial movement of those jacks. But, HWH took care of this by installing something in the system that takes care of that heat/expansion and, routes the heated, expanded fluid back into the reservoir. I'll have to re-read my HWH service manual to re-learn what that part of the system is called.

Scott
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Old 04-20-2016, 10:51 PM   #12
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Old 04-27-2016, 03:21 PM   #13
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Quote:
Originally Posted by r oliver View Post
Driving east on I 40 I heard a draging noise , stopped to find one rear jack in contact with ground and 2 front jacks about half down. Jacks would not retract or move at all. Realized hydro pressure and front jacks came up had to pry back one up
Any ideas, I'm stumped. And a long way from home
Richard

WOW! That's SCARY! Makes me more thankful for my air leveling!
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Old 04-28-2016, 12:03 AM   #14
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Rude posts have been removed. Please stick to discussing the issue.

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