I leave mine stored in an unheated garage with the landing gear extended only. I level it, then retract the rear pistons.
I made the mistake of trying to move the landing gear in -17 F temps to hook up to the truck, and one gear got struck, struggled, then leaked all winter. It did quit after use in the summer, but I just don't touch anything on the RV when its been sitting in storage below 0. Not the generator, not the slides, nothing.
It was said the manufacturer is the expert, but that is a pretty general statement. Chances are if you picked up the phone and asked the question, you were no where near an expert, rather you were talking to the customer service guy that is paid to give you an answer even if its wrong. You really have to dig to get back to the design engineers. Saying you need to exercise your landing gear through the winter is a blanket statement with little regard for actual circumstances.
