331 TH 12 front landing gear lubrication

From the Lippert site, this is from the Ground Control, but the jacks are pretty similar:

Preventive Maintenance

1. For optimum performance, the system requires full battery current and voltage. The battery must be

maintained at full capacity.

2. Check the terminals and other connections at the battery, the controller, and the jacks for corrosion,

and loose or damaged connections.

3. Remove dirt and road debris from jacks as needed.

4. If jacks are down for extended periods, it is recommended to spray exposed leveling jack rods with a

silicone lubricant every three months for protection. If the trailer is located in a salty environment, it is

recommended to spray the rods every 4-6 weeks.

Here is a link to the Lippert site, specifically the landing legs

Lippert