you lifted it up, with no weight on it, after removing the mattress
i don't think anything is stuck or froze
without the counter balance weight, its going to take a whole lot of pull to bring it down
i suggest you get the DW to help you pull it down
or you go around to the side and climb up on the bed platform
it needs some weight on it
to balance against the lift force
I can explain it to you.
But I Can Not understand it for you !
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1997 F53 Bounder 36s