The John Deere RE506791 is a genuine OEM engine oil dipstick, often integrated with a filler cap, designed for precise oil level measurement in various John Deere agricultural tractors. This essential component ensures accurate monitoring of engine oil, contributing to optimal engine performance and longevity. It is compatible with a wide range of John Deere 6000, 7000, and 8000 series tractors, including models such as 6100, 6200, 6300, 6400, 6506, 6600, 6800, 6900, 6010, 6110, 6210, 6310, 6410, 6510, 6610, 6810, 6910, 6020, 6120, 6220, 6320, 6420, 6520, 6620, 6820, 6920, 7200, 7400, 7600, 7700, 7800, 7210, 7410, 7510, 7610, 7710, 7810, 8100, 8200, 8300, 8400, 8110, 8210, 8310, and 8410.