I noticed a "popping" sound regularly when moving about our 2019 Keystone Avalanche 382FL 5th Wheel. I googled this and found this is a common issue with Lippert Leveling systems which can be resolved by following the the steps outlined in their TI-191 bulletin. I am posting procedure here for the benefit of others who have this common problem.
ADDING ANTI-STICTION FLUID TO HYDRAULIC SYSTEMS
which I had made available here
TI-191 Bulletin
I ordered Maxima 5690115WT Standard Hydraulic Fork Oil from amazon as recommended.
https://www.amazon.com/gp/product/B000WKAV2U/
I had several questions so I emailed Lippert support <
[email protected]> and received a reply from
Isaac Davis
Contact Center Leveling/Slides Technical Representative
574.537.8900
Mr Davis answered all my questions and so with his input I performed the following procedure
1) Lippert confirmed that the hydraulic leveling jacks use the same reservoir as the hydraulic slide. It is located in the forward passenger side compartment with the battery.
2) According to Lippert instructions, when the 6-point leveling system jacks are all fully extended, the fluid in the reservoir will be reduced... and when retracted, the fluid is drawn back into the reservoir filling it up.
3) Following instructions in the TI-191 bulletin, extract about 1 quart of fluid from the reservoir and then add back 1/2 quart of the Torco RFF Grade 15 oil. It says to use a turkey baster however the way Keystone has installed the reservoir, that doesn't work well. I used some clear vinyl tubing from the hardware store and inserted that into the reservoir and sucked on the hose to start the fluid siphoning out of the reservoir. I emptied about a quart and a half, then used the same hose to add a quart and a half of the Torco fluid back into the reservoir... I used a bottle with the neck the right size to get a tight fit on the hose, and wrapped a rag around it to prevent leakage.
4) Next I followed instructions to "Extend all hydraulic cylinders and jacks fully" and then to "Add the remaining amount of the specified (Torco RFF Grade 15) fluid"
5) Next I "Fully retracted all hydraulic cylinders and jacks". I retracted the kitchen hydraulic slides as well.
6) At this point if the fluid in the reservoir is more than 3/4 inch below the filler cap, I added more fluid to fill it up. Do not overfill... over filling can damage system according to Lippert.
7) Next I fully extended the slides and the jacks to mix the fluid in the hydraulic lines, and then fully retracted them once again.
8) Finally I "Ran the Auto-Level feature on the Level-Up system per instructions." I also extended the slides again.