One New Aftermarket Replacement Water Pump With Double Pulley Fits Allis Chalmers Tractor Models: D17 (W/ Diesel Engine S/N <119938 Except S/N 117087-117104), Wd45 (D17 Dsl Prior To S/N 119938, Except 117087-117104), Wd45 (Diesel & W/ Diesel Engine). Replaces Part Numbers: 74517291, Acd4516949, 4516949, 4516952, 4517291, 74516949-R, 74517359 All OEM part numbers and logos are to be used for identification purposes only