180 F or 194 F thermostat? (JD 820)

[2345joes]

180 F or 194 F thermostat? Preventative maintenance on a 1973 JD 820. Western Oregon is a fairly temperate part of the world. I can't tell if there is much of a difference for one vs another. Any thoughts?

AT22961 Remarks 180°F (82°C)

AT22963 Remarks 194°F (90°C)

 

[K5lwq]

I would go with 180°F but it either is fine.

 

[Tx Jim]

Due to the fact that most utility tractors don't reach operating temp for extended periods of time I'd choose the higher temp thermostat

 

[Tinhack]

That's a factor of engine design. Too cold, you loose power. Too hot, you loose power. I'd go with what the manual calls for.

My old JD 420C gasser just got a 160F thermostat. My 2006 GMC Sierra 4.8L just got a 187F.

 

[Zebrafive]

Good question, which I don't know the answer
For my 2030 diesel JD offers 180°, 194°, and 205°. For the gas version they have a 160°.
I have know idea what it has, but temp gauge runs the width of the pointer past straight up. Warms in 15-20 minutes in 60° plus outside temp.
Of your choices, I'd pick the hotter one, the 194°, since it's in the middle of what's offered for the 2030.

 

[boomer1025]

Why don't you just take the old one out of the tractor and see what the temp is marked on the thermostat and replace it with the same temperature thermostat.

 

[Sberry]

I might be tempted to leave it alone if its working.