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Old 11-16-2020, 05:58 PM   #1
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Brand: Still Looking
State: Florida
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THOR #21085
Jacks

we havea2017 challenger,the driver sidefrontjack keeps dropping when it is in storage and in the up position,thinking pressure leak but see no fluid leaking any ideas? Thanks
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Old 11-16-2020, 06:16 PM   #2
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Brand: Thor Motor Coach
State: Missouri
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THOR #6903
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Originally Posted by elrod View Post
we havea2017 challenger,the driver sidefrontjack keeps dropping when it is in storage and in the up position,thinking pressure leak but see no fluid leaking any ideas? Thanks
Either the solenoid valve or internal ram o-ring
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Old 11-26-2020, 03:03 AM   #3
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Brand: Thor Motor Coach
Model: Hurricane 27K
State: Nevada
Posts: 287
THOR #970
Not solenoid

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Originally Posted by elrod View Post
we havea2017 challenger,the driver sidefrontjack keeps dropping when it is in storage and in the up position,thinking pressure leak but see no fluid leaking any ideas? Thanks
I have this problem, (Hurricane 27K) replaced $450 parts Lipper told me, Solenoid and valve, no fix. Replaced the RF jack that was sagging like yours, others slightly down.. LR drops 8". replace it. Now the other two drop slightly, am replacing both this week, but the 2 new ones are tight up... All 4 fail at the same time? I don't know what.. don't do anything for a couple weeks, I will let you know how my ordeal turns out, maybe save you $$$

Peter
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Old 11-26-2020, 03:11 AM   #4
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Brand: Thor Motor Coach
Model: 2018 24.1 AXISSIXxSIX
State: Arizona
Posts: 2,503
THOR #13932
If you haven't a plan for the jacks you take off, I wouldn't mind making you a deal.
I'd like to experiment and see if it's seals and if there's restrictors that can be removed and if a one way aux valve could be installed allowing a throw of a switch to absolutely lock them up or down, but I need some to experiment with. I'll do a thread outlining the added parts.
I've done it to hydraulics before. I think its either really easy, or really impossible.

Pm me if you'd like to sell them.
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Old 11-26-2020, 05:10 AM   #5
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Brand: Thor Motor Coach
Model: Hurricane 31S
State: Texas
Posts: 2,252
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Originally Posted by elrod View Post
we havea2017 challenger,the driver sidefrontjack keeps dropping when it is in storage and in the up position,thinking pressure leak but see no fluid leaking any ideas? Thanks
All the jacks are plumbed to one valve which supplies fluid for all jacks to stow when retraction is commanded. During the retraction sequence when the pressure reaches 300 psi, the systems knows the jacks are retracted and shuts down. If hold-up valve leaks enough, the jack with the least internal resistance will come down first. If the pressure in the return line is less than 250 psi, the emergency retract system will start if the coach's parking brake is released. If there are big ambient temperature swings while my coach is parked for 60 days or more, the left front jack will drift down about 4 inches.
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