The John Deere R49423 is a genuine OEM O-Ring specifically designed for cylinder liner packing applications across a wide range of John Deere agricultural, construction, and industrial equipment. This critical sealing component is engineered to prevent coolant or oil leaks around the cylinder liners, maintaining optimal engine performance and reliability. Manufactured to John Deere's stringent quality standards, the R49423 O-Ring ensures a precise fit and durable seal, contributing to the longevity and efficient operation of your machinery's engine.