EE WAS FILLING A NEW FEEDER SPEED REDUCER WITH HYD. FLUID WHILE AND THEIR MECHANIC USED A SLEDGE HAMMER TO REMOVE A SPROCKET FROM THE OLD ONE. EE'S SAFETY GLASSES FOGGED UP AND HE TURNED HIS BACK TO THE POUNDIN GAN DREMOVED THEM FOR CLEANINING. WHEN THE POUNDING STOPPED HE TURNED AROUND AND SUDDENLY THE OTHER MECHANIC, STRUCK THE SPROCKET AGAIN. A PEICE OF METAL CAME OFF AND STR