Upgrade or replace with confidence using this Aftermarket crankshaft, 4-cylinder. Compatible with models including 1640, 1830, 1840, 2020, 2030, 2040, 2040S, 2120, 2130, 2140, 219D, 239D, 2450, 2650, 2850. Interchangeable with OEM John Deere part number(s): AT18030, RE48748. Designed to fit John Deere equipment and built for long-lasting performance.