I had the exact issue. Luckily my slide hydraulic pump quit working when the slide was only out about 4 inches. There was no way to move it back in or to extend it fully. The override procedure I located in the manual did not work, fortunately I was at home and not on the road. Lippert was great but it did take nearly 5 weeks for them to build, ship and receive the new motor and pump.
2008 Monaco Camelot 40PDQ