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Old 09-03-2020, 08:11 PM   #1
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Brand: Thor Motor Coach
Model: Hurricane 27K
State: Nevada
Posts: 388
THOR #970
Lippert hydr jack in front won't stay up

I searched, did not get any hits. This is the auto leveling system in a 2014 Hurricane 27K class A. After retracting the RF jack goes back down about 3 inches within 3 mins.. If it sits long enough the LF will go down also, it went down almost to the ground after sitting 6 weeks as did the RF. Rears do not seem affected. I did the phone tech, try this, try that, they advised to replace the valves and coils for the front, that did not work $400 later. Now they say to do a test, disconnect one by one, run the retract and see if fluid spills out from the jack, means bad seal, need new jack. I am not sure I want to do this myself... how hard is it disconnecting the hose ( black hose only) ? Anyone else had this problem?

Thanks
Peter

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Old 09-04-2020, 02:39 AM   #2
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Brand: Thor Motor Coach
Model: Citation
State: Texas
Posts: 905
THOR #8139
You can just take the hoses loose at the jack. There'll be some fluid dripping so have some rags handy. AND someway to keep dust/dirt out of the fittings.
Don't worry about high pressure or air in the hoses. When your finished cycling the system a few times will bleed the air out.

Here are a couple of YouTube's that might help.
Contact a hydraulic shop to see if they can rebuild your jack



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Old 09-04-2020, 09:40 AM   #3
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Brand: Thor Motor Coach
State: Missouri
Posts: 2,164
THOR #6903
It would be unlikely that you have two bad o ring seals

Use tubing wrenches if you decide to work on the fittings

If the seal is bad it will definitely show up when you crack the return line
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