Posted by Moline_guy on September 23, 2016 at 11:44:57 from (216.106.219.226):
I bought a 6620 from not too far away, on the way home it was running warm, not into red but close. Engine and top radiator hot, but lower radiator cold. I put in two new thermostats from Deere and same program. With both thermostats in it circulates hot water up to cab heater, but does not seem to move any water through the radiator. Radiator looks clean and had been replaced at some point. When draining and pouring water into and out of radiator it seems to move through the radiator as fast as you can pour. I removed one thermostat and ran it a bit this way and the radiator stays warm top to bottom and there is a lot of movement looking through the open radiator cap. Can i run with one thermostat out? Does a water pump "wear out" that I need to replace the water pump to push the water through the thermostats? Any ideas or suggestions as to what is going on here? Thanks for any help.
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