WHILE ATTEMPTING TO REVERSE THE DIRECTION OF A CONVEYOR FEED CHAIN BY USE OF THE MANUAL LEVERS THE PALM OF THE OPERATOR'S LEFT HAND WAS PINCHED BETWEEN THE BASE OF THE LEVER & A HYDRAULIC HOSE LEAVING A LACERATION THAT REQUIRED SUTURES TO CLOSE. EE WAS NOT WEARING GLOVES AT THE TIME & ONE HANDLE ON THE FEEDER WAS MISSING. RELEASED TO FULL DUTY.