[bobbecky]

The seal maintenance has been covered, but Lippert recommends no lubricant on the slide rails. Even oiling the bronze bearings of the gear packs doesn't seem to make any difference. I used to spray the gears and racks with dry silicone lube, and all that did was help cause the gears to jump the teeth on the racks which causes the slides to get out of alignment. This is copied from the Lippert slide maintenance manual:
The Lippert Through Frame Slide-out System has been static tested to over 4,000 continuous cycles without any noticeable wear to rotating or sliding parts. It is recommended that when operating in harsh environments (road salt, ice build up, etc.) the moving parts be kept clean. They can be washed with mild soap and water. No grease or lubrication is necessary and in some situations may be detrimental to the environment and long term dependability of the system.