Not sure this will help, but I seem to remember it may help to run the slides in/out thru several cycles. Also, the front jacks down/up without putting pressure on them to lift. On manual operation...
2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired