All States Ag Parts Water Pump John Deere 4040 4230 AR55961 Fits John Deere Tractor(s) 4040, 4230 Replaces John Deere OEM nos AR98549, AR55961 Replaces Casting nos R51683 Includes: hub, pump to backplate & backplate to block gaskets For Replacement Plate To Block Gasket use 153399