The John Deere R550381 is a genuine OEM fan drive pulley designed for various John Deere agricultural and construction machinery. This critical component ensures the proper operation of the engine's cooling fan, maintaining optimal engine temperature and preventing overheating. Manufactured to John Deere's rigorous standards, the R550381 pulley provides reliable power transmission and durability for demanding applications. It is an essential replacement part for maintaining the efficiency and longevity of your John Deere equipment's cooling system.