Rev:11.08.19 Page 138 CCD-0001573-08
Preventive Maintenance
1. Check hydraulic fluid in reservoir every 12 months. If fluid is a clear red color, do not change. If fluid is
milky, pink and murky and not clear red in color, drain reservoir and add new fluid. See Adding Fluid,
Purging Air From Hydraulic System section.
NOTE: Check and fill the hydraulic fluid only when the jacks are fully retracted. Filling the reservoir when
jacks are extended will cause the reservoir to overflow when jacks are then retracted.
NOTE: When adding hydraulic fluid, fill reservoir to the fill line.
2. Inspect and clean all power unit electrical connections every 12 months. If corrosion is evident, spray
power unit electrical connectors with lubricant.
3. Remove dirt and road debris from jacks as needed.
4. If jacks are down for extended periods, it is recommended to spray exposed inner tubes with a
silicone lubricant every three months for protection. If the trailer is located in a salty environment, it is
recommended to spray the exposed inner tubes every four to six weeks.
Adding Fluid, Purging Air From Hydraulic System
1. Start with all hydraulic components in the fully retracted position, i.e. the trailer is ready for travel.
2. Remove motor cover to gain access to the hydraulic reservoir. See Manual Override section.
3. Remove fill cap and check fluid level.
NOTE: When checking the fluid level after the hydraulic components are retracted, note if there are any
bubbles, froth or foam on top of the fluid. This is an indication that air has been pushed back to
the reservoir when the hydraulic components were retracted. Wait 15-20 minutes for the foam to
dissipate before beginning the purge process.
4. If there is no froth or foam in the reservoir and the fluid is not to the fill line, fill the reservoir to the fill
line at the top of the reservoir.
5. With the fluid level full and no foam in the reservoir, begin cycling the hydraulic system. Extend the
jacks until the footpads touch the ground, and then immediately fully retract the jacks.
6. Check the reservoir for foam. If foam is present, see NOTE after step 3 and repeat steps 4 and 5.
7. Repeat these steps until no foam is present in the reservoir. If no foam is present, the system is purged
of air.
8. Replace fill cap and reinstall motor cover.
Fluid Recommendation
Type “A” automatic transmission Fluid (ATF) is to be utilized. Lippert Components, Inc. recommends ATF
with Dexron III® or Mercon V® or a blend of both.
For a list of approved fluid specifications, see TI-188. Or go to https://www.lci1.com/stabilization/support-
patriot-jack-systems, click on the Technical Information Sheets tab and then select TI - 188: Hydraulic
Operation Fluid Recommendation from the listed documents.
NOTE: In colder temperatures less than 10° F, the landing gear may extend and retract slowly due to
the fluid’s molecular nature. For cold weather operation, fluid specifically formulated for low
temperatures may be desirable.
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