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Old 09-30-2019, 09:19 AM   #1
jcurryii
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M.O.C. #12636
Level up front cylinders leaking down

Had a problem with front cylinders leaking down. Replaced solenoid valve on cylinder per LCI. Now after releveling, cylinders have extended on their own about 3/4. Really has me confused. Anyone else have had this problem?
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Old 10-03-2019, 10:31 AM   #2
ChuckS
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M.O.C. #20949
Your MOST likely cause if front LG creeping down is one of the two of the hydraulic cylinders is leaking internally ....

Lippert has a simple test to verify leak down and isolate which one is causing the issue.

Also you can have those front cylinders rebuilt at any local hydraulic shop for a fraction of the cost of a new one and will most likely have a more reliable cylinder.

The two front LG are Lead and Follower connected in tandem
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Old 10-03-2019, 10:33 AM   #3
ChuckS
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M.O.C. #20949
But... before you do anything else do a simple bleed and purge of the hydraulic system .. this will remove
Any air in system that might also cause your problem. Run slides in and out a few times and all levelers up and
Down a few time.

Pause between cycles to let pump motor cool down
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Old 10-03-2019, 10:45 AM   #4
jcurryii
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M.O.C. #12636
I agree, Hydraulic shop will pull both front cylinders first of week. So no sense in just rebuilding one then down the road having same issue. Thanks for your input.
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Old 10-03-2019, 10:47 AM   #5
jcurryii
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M.O.C. #12636
Done that at LCI recommendation. May have had some air in system as now we have returned to the original problem of leaking down.
Thanks for your post.
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Old 10-09-2019, 02:14 PM   #6
jcurryii
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M.O.C. #12636
Cylinders are scored and sleeves are not replaceable. Have to buy complete jacks per LCI at $517+ each.
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Old 10-13-2019, 11:46 AM   #7
Travelling Three
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M.O.C. #19003
Sounds like I have the same problem. When lifting the 5th wheel off the hitch it will slowly go back down into the hitch. Also once the camper is leveled, after a week, I need to Auto-Level the camper to get the front landing jacks to extend to their proper position. My question is did the hydraulic shop tell you the sleeves were damaged and needed to be replaced or did Lippert tell you this? We live in our camper and move around frequently so I don't think purging my leveling system will help. Thanks for any additional info you can provide.
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Old 10-13-2019, 02:25 PM   #8
jcurryii
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M.O.C. #12636
The Hydraulic shop said the sleeves had pressure grooves that couldn’t be built up and honed. Lippert told me that they only sell complete jacks and not the sleeves.
First thing Lippert told was that most of the time it is the solenoid valve mounted on one of the front cylinders that causes leak down. Shop rebuilt mine and problem continued thus the pulling and tear down of the cylinders. The solenoid valve on mine was on the roadside cylinder. Also the curbside was leaking a little around the top.
Check the solenoid valve first.
Good luck.
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Old 10-14-2019, 09:17 AM   #9
ChuckS
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M.O.C. #20949
You can test those front LG cylinders yourself in a very short period of time... this way you will Know which.. if any.. front leveler is leaking internally... the two front LG operate in tandem..one is Lead and other is follower

Identify the ORANGE hose on top of each front LG leveler leg... this is the hose you will remove to test each cylinder for internal leaking...

Follow the Lippert TI bulletin.....test one cylinder at a time

The mid and rear hydraulic levelers also operate in tandem.. one is lead and one is follower ... for each side... your concern is Front LG levelers ....

Also..IF the manual override solenoid on the front LG leg... there will be ONLy 1..is not fully closed then this too can allow leakdown of the front levelers
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Old 10-14-2019, 10:03 AM   #10
jcurryii
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M.O.C. #12636
Thanks for information. Solenoid valve atop roadside jack was rebuilt and leak down cot inured. New jacks ordered as both Cylinders had scored sleeves. Too bad you can’t just get the sleeves.
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Old 10-14-2019, 11:13 AM   #11
ChuckS
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M.O.C. #20949
So did the leak down test indicate a leak on one or both cylinders ? Minor scoring on the sleeves themselves is really not an issue. The leak down test would have verified this.
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