The oil cooler was plugged on mine and after the oil cooler the radiator was getting plugged. I had to unclip the trans cooler and pull it out of the way to clean it.
If I recall the temp was high but still workable but the tractor mower deck would have to be reengaged after every reverse direction. Yours is newer so they probably put more features on it.
Don't know if you read an earlier post but this was my problem. You were one of the earlier people to suggest this, but I was thinking about the outer screens and forgot about the inner one. As for the oil cooler, everything is super clean there, just grass clippings stuck to that screen. And you are right, my temp was what I thought very acceptable, but JD must know better. Thanks again!