my 753 shut down completely, showing trouble code ''6055'' on hour meter...light is dim and vision not great but thats what it looks like anyway......have run it hard for several hours yesterday and several more today with no problem...my 9 yr old son wanted to ride so i idled around about 15 minutes letting him push brush to the PILE.........shortly after resuming throttle up work it shut down...will immediatly restart..would run for anywhere between 2 and 25 minutes before shutting down again...each time showing same code...this went on about 2 hours before i quit...fuel/oil/water checking okay...any help would be MUCH appreciated...THANKS..HH..