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Old 07-04-2018, 11:07 AM   #1
WRWGN
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Popping Noises

Has anyone heard popping noises from their coach while parked? My last coach had a Lippert Leveling System too. I would hear popping sounds when in colder weather. I talked to their customer service and they told me it was a known issue and Lippert has a procedure to add some anti-stiction fluid to the hydraulic system to solve the problem.


The closest I've been to colder weather is in NW Wyoming where it has been in the lower 40's at night. Just wondering if anyone has heard these noises from their coach?


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I'm researching thr Lippert site for an official notice, but the Lippert process that was sent to me (not from Lippert) is:


This is from the Lippert addendum: ADDING ANTI-STICTION FLUID TO LCI HYDRAULIC SYSTEMS

Introduction:
If there is a popping noise in a Lippert Leveling system, Lippert has approved adding a quart of anti-stiction
fluid. Approved fluids are listed by brand name and fluid characteristics below:
1. Torco RFF Grade 15
2. Maxima Fork Oil Grade 15
3. Caterpillar Hydraulic Oil Additive 1U-9891

For maximum results in the shortest amount of time, please follow the preparation and procedure exactly
as written below. Failure to follow the preparation and procedure may result in delayed resolution of the
audible disturbance.

Preparation:
1. Obtain a clean container (large enough to hold a quart of fluid)
2. Obtain a fluid extraction device (siphon, turkey baster, etc.)
3. Fully retract all hydraulic cylinders and jacks.

Process:
1. Using the fluid extraction device, remove one quart of fluid from the power unit reservoir.
2. Add 1/2 quart of the specified fluid.
3. Extend all hydraulic cylinders and jacks fully.
4. Add the remaining amount of the specified fluid.
5. Fully retract all hydraulic cylinders and jacks.
6. Run the Auto-Level feature on the Level-Up system per the instructions found in the Owner's Manual.

NOTE: If the noise persists, the addition of a second quart may be necessary. Follow steps 1 through 6.
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Old 07-04-2018, 01:05 PM   #2
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Remove the pint of fluid from the reservoir and add the stiction. Then cycle all the jacks and slides several times. You'll need to hook up to the truck to do the front legs.
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Old 07-04-2018, 01:49 PM   #3
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Common problem. Many of us has had it.
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Old 07-04-2018, 10:02 PM   #4
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Thanks. I'll be doing this once we get to Texas for the winter.
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Old 07-05-2018, 08:06 AM   #5
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Quote:
Originally Posted by Traveling Home View Post
Remove the pint of fluid from the reservoir and add the stiction. Then cycle all the jacks and slides several times. You'll need to hook up to the truck to do the front legs.
Curious why you would remove a PINT when the directions say to start with a quart?
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Old 07-05-2018, 08:08 AM   #6
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Slides in and jacks up with RV attached to TV, suck out ALL the fluid possible and re fill with AMZ/OIL Synthetic Universal ATF to within 1/2" of top of "CONTAINER"
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Old 07-05-2018, 09:55 PM   #7
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Cummins, are you saying they use the wrong oil in the system?

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Old 07-05-2018, 11:20 PM   #8
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No, he is recommending replacing it with a known high-quality synthetic. A synthetic ATF/hydraulic oil is superior to regular oil, but may not always be necessary. Only downside is cost...
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Old 07-06-2018, 10:36 AM   #9
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Cummins, are you saying they use the wrong oil in the system?

Dave

They use the cheapest Dextron ATF they can find in a 55 gallon drum.

Also it helps to use supporting blocks like I made.

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Old 07-09-2018, 03:06 PM   #10
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The Lippert web page has a tech sheet on this problem and gives you instructions.
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