EE WAS MANUALLY MOVING A HYDRAULIC PUMP OFF OF A PALLET LOCATED ON THE MAINTENANCE SHOP FLOOR. HE INITIALLY TRIED TO PICK IT UP, THEN DECIDED TOJUST ROLL IT OFF THE PALLETS. THE PUMP WEIGHED A PPROXIMATELY 200 LBS. LATER, HE BEGAN TO HAVE DISCOMFORT IN HIS LOWER BACK.