I found this on the Lippert website, I am not 100% sure if this is the type of slide that is used but it looks a lot like what I have in my unit.
The Lippert Embedded Rack Slide-Out System has been designed to require very little maintenance. To ensure the
long life of your slide-out system, read and follow these few simple procedures.
Do not work on your slide-out system unless the battery is disconnected. Failure to act in accordance
with the following may result in death or serious personal injury.
1. When the room is out, visually inspect the Inner (Fig. 3A) and Outer (Fig. 3B) Rail Assemblies. Check for
excess build-up of dirt or other foreign material; remove any debris that may be present.
2. If the system squeaks or makes any noises it is permissible to apply a coat of lightweight oil to the drive
shaft and roller areas but remove any excess oil so dirt and debris do not build-up. DO NOT use grease