Pulley, Water Pump (Single Groove) (Series III Diesel). PART NO: A-74513381. New 1 groove water pump pulley fits the Allis-Chalmers Tractor D17 (series III diesel) or D19. . MODELS: Allis-Chalmers TRACTOR: D17 (Series III Diesel) Allis-Chalmers TRACTOR: D19.