I looked into this back when I had an 1863 and posted a similar question on this forum. The tractor was running very hot, and I didn't know why. I later learned through posters on this forum the tractor was running lean. Google "oil coolers for Kohler Command engines," and you will see how they are put on the engine. Part of the shroud covering the shaft/flywheel area is cut out, and the cooler attaches to the side of engine tins and partly inside the shroud to get the cooler air. It should be noted some larger Cub Cadet zero turns may have them assembled already. Since I got the GT2000, I have not thought about it as engine does not run hot.
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