New Aftermarket Replacement Engine Oil PumpFits John Deere Tractor Diesel Engine Models:4.239A, 4.239T, 4.276T, 4045, 6.359D, 6.359TFits John Deere Construction & Industrial Models:340D, 344E, 444E, 490, 490E, 550, 550A, 550B, 550G, 555, 555A, 555B, 555G, 650G, 340D (4.276D ENG), 344E (4.276D ENG), 410C (4.276D Eng), 410D (4.276D ENG), 450E (4.276D ENG), 450G (4.276D ENG), 455E (4.276D ENG), 490D (4.276D ENG), 493D (4.276D ENG), 510B (4.276D ENG) Specifications:1 Piece Cast Housing With Steel PlateHousing Marked R54629 or R975872.00" Wide Internal Oil Pump GearsOil Pump Intake (Sump) Not IncludedPlease Note: Disassemble old Oil Pump & measure internal Gears before orderingReplaces Part Numbers:AR79463, EOP4.5/6.8, RE50363, RE51497, AR79464, AV104012 All OEM part numbers and logos are to be used for identification purposes only