ODChrist - I believe if you check the manual, it states clearly to put the Jacks down first before you extend the slides, as if the coach is not level, the slides could go out, and stick and you will never get them in because they are pinched in the opening.
So With the slides/jacks in/up, put HWH fluid in the reserviour and then level the coach and extend the slides, to see if it's working properly.
You will need lots of manpower if you get a slide stuck, because of not being level if you even can.
Monty & Janet - 2007 Alpine APEX 40 MDTS
S/N - 75715 - Retired - Master Certified RV Tech