I WAS MOWING USING A BEHLEN 5 FT ROTARY CUTTER FOR ABOUT 45 MINUTES. THE TRACTOR WAS RUNNING AT 1800 RPM. AT THAT POINT A REPETITIVE BEEPING UNDER MY SEAT OCCURRED. I DISENGAGED THE PTO BUT THE BEEPING CONTINUED. I TURNED OFF THE TRACTOR OFF AND THE BEEPING STOPPED. WHEN I IMMEDIATELY...