My D6H LGP with 15 ft blade trans runs at 200-205 F is that normal op. temp drops quick when i stop engine runs 185 F.
Is this a change or normal? Are your coolers clean if air to liquid? Coolant system had routine service? Have your fluid and filters/screens been serviced routinely? Doesn't seem too out of line to me but I'm not familiar with the tractor or parameters. Coming back down in temperature quickly usually relates to a fluid medium not carrying the heat away quickly enough; meaning maybe the engine cooling system needs addressed.