The John Deere R70443 is a genuine OEM crankshaft pulley designed for various John Deere agricultural and industrial applications. This critical component ensures efficient power transfer from the engine's crankshaft to accessory belts, driving systems like the alternator, water pump, and hydraulic pump. Manufactured to John Deere's rigorous standards, it provides reliable performance and durability, maintaining proper belt tension and alignment for extended service life. Verify fitment with your specific John Deere equipment model.