shop crane

Had a problem with my 2 ton shop crane,i over extended it,i guess and it got stuck at full lift.had to wack the hell out of it,then it drop a foot or two.it now jack up fine but now it comes down very slowly,i mean slowly.I plan on selling it but dont want to sell it if its trash.O by the way its just over a year old,and only used twice. Any thoughts.

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