Here is the procedure I found from the TYM Tractors Owners Facebook group:
"
Here's a simple way on 474 I published Aug 23. Not sure if it works on 574 but what do you have to lose?
"Change dash temperature reading.
You can easily change the displayed engine temperature from Celius to Farenheit, or vice versa. This very simple procedure can be done while tractor is running, or just turn ignition on. My tractor is a 474 hydro for reference, new with just 40 hours.
Change temp from C to F or the opposite.
1-Turn ignition on, wait a few seconds.
2-Depress then release Info button so dash reveals voltage & temperature.
3-Turn headlights on bright.
4-Depress & continue holding Info button approximately 15 seconds or until temp changes from Celius to Farenheit or vice versa.
5-Done." "
Hopefully it helps.