EE HAD BEEN WORKING IN THE RAW MILL SEPARATOR. THE JOB INVOLVED MOVING SEVERAL LARGE PIECES THAT COMPOSE THE UPPER TABLE. EACH PIECE APPX. 250 LBS. PIECES HAD TO BE MOVED ON ELEVATOR THEN OFF ON 7TH FLOOR. CO-WORKER WAS ASSISTING. EE ALSO DID OTHER WORK. AS HE WAS CLIMBING OUT OF SEPARATOR, HE FELT PAIN IN SHOULDER. NEXT WEEK HE WORKED IN LAB. OCTOBER 20TH HE WAS PLACED ON RESTRICT