1. The JOHN DEERE 4990 Self-Propelled Hay and Forage Windrower TM1820 is a high-quality agricultural machine designed to efficiently cut and windrow hay and forage crops. With its self-propelled feature, it offers ease of use and maneuverability in the field. This model also comes with a free online manual, providing users with comprehensive instructions and troubleshooting tips for optimal performance. Whether you're a professional farmer or a hobbyist, the JOHN DEERE 4990 is a reliable and versatile choice for your hay and forage needs.