dissecting a Lippert Ground Control 3.0 landing leg

There is a nut in the top of the leg that usually strips out due to lack of lubrication. Once you remove the cotter pin you can remove the inner sleeve and unthread the acme screw from said nut. They are really simple to disassemble once you remove them from the unit. They should have installed a grease fitting on these because the grease gets wiped off the threaded rod with use and then its left to run dry.