The John Deere AL64013 is a genuine OEM tachometer designed for a wide range of John Deere agricultural tractors. This essential instrument provides accurate engine RPM readings, crucial for monitoring engine performance and ensuring optimal operation. It is compatible with numerous John Deere tractor models including the 840, 940, 1020, 1030, 1040, 1120, 1130, 1140, 1630, 1640, 1830, 2020, 2030, 2040, 2040S, 2120, 2130, 2140, 2250, 2450, 2650, 2850, 3030, 3040, 3050, 3120, 3130, 3140, 3350, 3640, 3650 Series. Ensure reliable performance with this authentic John Deere replacement part.