TRYING TO THROW CLINKER DIVERTER #3 AND WOULD NOT THROW. HE DECIDED TO MOVE WITH HYDRALIC CYLINDER. OPERATING THE HYDRALIC PUMP, USING HIS CHEST TO PUMP THE CYLINDER PUMP. THE CYLINDER PUMP WO ULD ONLY BUILD PRESSURE IN A VERTICAL POSITION. USING HIS BODY FOR SUPPORT, HEARD SOMETHING POP IN THE CHEST AREA. FELT PAIN 2/11/01, WENT TO DR. 2/12/01