Water Pump For Allis Chalmers Tractor A B C Ca Others-79016821 100% new water pump meets OEM quality for tractors and farm equipment 1-year warranty covers you throughout planting and harvesting seasons Factory direct pricing delivers an honest value for hard-earned money Replaces OEM Numbers: Allis Chalmers: 250397, 79004255, 79016821, 79016821V Specs: Description : Water Pump, Drive : Pulley, Pulley : Single Groove V-Belt, Gasket : Not included, Product Notes : Threaded port type, Hub only, no pulley.