EE WAS CHANGING OIL ON CYCLONE PUMP. #3517 BRODERSON WAS GUIDED INTO POSITION TO WORK ON THE PUMP. EE CONTINUED TO FILL THE RESEVOIR WITH OIL. WHILE DOING SO HE STRUCK HIS LEFT ELBOW AGAINST T HE BRODERSON CAUSING PAIN. HE ELECTED TO HAVE SURGERY ON 3/7/02 AFTER PROLONGED MEDICAL TREATMENT WITH NO PAIN RELIEF.