Check to see if the PTO shaft is turning when you "engage" the lever. It's possible somebody disconnected the linkage or cable underneath. There should be a lever that moves on the PTO gearbox.

If the shaft turns but no lift, check the oil level in the cylinder(s) or reservoir.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!