CHANGING OUT BAD ROLLERS AT #8 WALL #1 NORTH MOTHER BELT. AFTER HE & ANOTHER EMPLOYEE HAD TAKEN OUT A BAD BOTTOM ROLLER THEY WERE LYING UNDER THE BELT TO INSTALL THE NEW ROLLER. AS BOTH EMPLOY EES WERE LIFTING THE ROLLER INTO THE BELT HANGER HE FELT A PAIN IN HIS LOWER BACK. THE INJURY WAS DIAGNOSED AS A STRAIN.