PLEASE FOLLOW INSTRUCTIONS CAREFULLY TO PREVENT DAMAGE TO YOUR NEW UNIT. D89898 D73670 STEERING MOTOR for CASE IH Industrial Tractor. Square Port Pattern; Round TRW Style Pin. Finding the right part? Just send us a message! Our team here at Alexander’s is very. Than happy to assist you! Message replies usually sent same business. ALEXANDER’S TRACTOR PARTS. Family Owned & Operated. Over 40 Years in Business.