I have a new holland 70a just traded for it, when driving on road about 4 miles the temperature gauge starts slow gradually gets hotter until it hits hot, thermostat or water pump
Loose fan belt, low coolant level, dirty radiator, failed temp sender, gauge failing, plugged oil cooler, poor instrument cluster ground. How many parts do you want to throw at it?
Water pump would be at the bottom of my suspect list.