It takes a lot of work on these newer 9L and 13.5L Deere engines just to blow some wind! Vari-Cool fan drive maintenance is super important to keep these high horsepower tractors running nice and cool. In this video we tear into the fan drive of a John Deere 8310R. This iT4 9L engine uses a variable speed fan drive that is hydraulically controlled and if not maintained properly, it can get expensive fast.
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