The John Deere L154170 is a genuine OEM belt tensioner cap designed for a diverse array of John Deere agricultural and construction equipment. This cap plays a crucial role in protecting and ensuring the proper function of the belt tensioning system, contributing to optimal performance and extended longevity of your machinery. It is compatible with numerous tractor, combine, cotton picker, forage harvester, sprayer, windrower, and loader models. The cap measures approximately 38.1 mm in length, 38.1 mm in width, and 19.05 mm in height, with a weight of about 0.005 kg, ensuring a precise fit for specified applications.