John Deere Lower Thermostat Gasket - M805835

My 4510 started showing an overheat condition on the temp gauge. A Google search shows this to be a common problem that in most cases was a bad instrument cluster. Before I shelled out for a new cluster I felt I should try the cheap fixes first so I ordered a thermostat with the proper gaskets and a new temperature sending unit. Installing was straight forward, but the thermostat only goes in the hole, one way because the mechanism is off center. The o-ring lower gasket is tiny and removing the old one was a pain. Once the groove was cleaned out, the new one went in without issue. The upper gasket was more like others I have encountered and was likewise, not an issue. We will need to run the tractor a bit to see if this fixed the issue. So far it looks OK, but we haven't really worked it hard. Time will tell.