EMPLOYEE WAS HELPING OTHERS INSTALL A MECHANICAL SPLICE IN A BELT. AS HE WAS OPERATING THE DEVISE THAT INSTALLS THE CLIPS IN THE BELT SPLICE HE FELT PAIN IN HIS BACK. THE DEVICE IS OPERATED WI TH HIS HANDS. INPROPER BODY POSITION CAUSED THE INJURY. THERE WAS NO DAMAGE OR IMPAIRMENT TO THE OPERATION OR TO ANY EQUIPMENT. NO OTHER FACTORS WERE INVOLVED.