Odd Engine fan behavior

[Waterloo]

Holy smokes! Call the dealer and get the number, cross reference it, any big truck parts store should carry one. FleetPride, NAPA, etc. Bunch on eBay too, pretty common part. Try Freightliner too, they should stock it, or an equivalent that will work. I find Freightliner prices to be pretty good, much better than International by a long shot.