The John Deere R123161 is a genuine OEM rocker arm shaft support designed for a wide range of John Deere agricultural, construction, and forestry equipment. This critical engine component helps maintain the stability and proper alignment of the rocker arm shaft, which is essential for precise valve train operation and overall engine performance. Weighing approximately 0.054 kg, this support ensures durability and reliable function in demanding applications, contributing to the longevity and efficiency of your John Deere machinery.