I think your best bet is to find the mfg of your slides and then Google it and maybe make another post here to get some help. Without doing that, you need to have someone here familiar with that year and make of coach to read the post and it could turn out to be a long shot.
I'm pretty sure you'll find that there is a process defined which will involve opening a couple of valves and then putting a wrench on something to manually crank it in.
Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.
2007 Itasca Ellipse 40FD