In Reply to: Wheat setting on Case IH 1660 posted by Bill on May 17, 2001 at 21:34:00:

For a standard rotor you would run it somewhere between 600-800, (specialty rotor-800-1000) and the fan can run from 1050-1150. Set them first at the initial settings in the book and adjust accordingly from there. Probably run your concave around 1.5 and you can usually run your sieves pretty tight. Front-3/8, middle-1/2, back 1/2 and shoe-3/8. They may have to be opened up if you have too much loss.

Hopefully that helps you some.