The Bepco 264977 Ball Joint is a high-quality replacement component designed for John Deere agricultural tractors and industrial/construction equipment. This ball joint directly replaces OEM part numbers JD39020 and 39020. It ensures precise steering and suspension functionality, crucial for the reliable operation of your machinery. Compatible with John Deere tractor models including 820, 830, 920, 930, 940, 1020, 1030, 1040, 1120, 1130, 1140, 1630, 1640, 2020, 2030, 2040, 2120, 2130, 2140, 3030, 3040, 3120, 3130, 3140, and industrial/construction models 300, 300B, 301, 301A, 302, 302A, 400, 401, 401B, 401C, 401D.