The John Deere RE40444 is a genuine OEM hydraulic pump designed for a wide range of John Deere 6000 and 7000 series agricultural tractors, including models such as 6100, 6200, 6300, 6400, 6506, 6600, 6800, 6900, 7200, 7400, 7600, 7700, 7800, and various 7R series models. This critical component ensures the efficient operation of the hydraulic system, providing essential power for steering, implement control, and other hydraulic functions. Weighing approximately 15.0 kg, it is a direct replacement, also superseded by part number RE503002, to maintain optimal machine performance and hydraulic integrity.