This precision-engineered oil pump timing tool is designed to accurately position the oil pump for correct rotational alignment, allowing the distributor to be set precisely in its proper location. While some technicians may attempt to time the oil pump by visual estimation, this tool significantly reduces installation time and frustration by ensuring accurate positioning on the first attempt. By using this tool, you can properly install the oil pump and oil pan without the repeated trial-and-error process—an especially valuable advantage when working with engines still mounted in tractors. Compatibility: Designed for use on gas and all-fuel engines across multiple John Deere models, including the M, 40, 420, 430, 440, 1010, and 2010 series. It is also compatible with various applications utilizing John Deere 115 and 145 engines, among others. Manufactured to meet OEM specifications, this aftermarket tool offers the same level of precision, quality, and durability as the original AMT450T, which is no longer available. OEM Reference: AMT450T (for reference only – aftermarket tool)