I have also discovered this problem with mine recently, and apparently it is common on these Lippert pumps. There is a seal on the hydraulic pump that goes bad and the fluid leaks the only place it can go, through the motor. It's not much fluid, but eventually, the motor will foul up. The seal can be replaced and you can clean the motor up if it's still working.
See this thread
I'm trying to avoid doing mine until this fall, so I put a washer between the motor and the pump, hoping it will just drip before reaching the motor avoiding any further damage. You might also want to take off the cover off the end of the motor, the one with the rubber plug that gives you access to the emergency turn nut. Fluid will leak out the screw holes instead of building up inside.