1. The John Deere 6850 Forage Harvester TM4621 is a top-of-the-line agricultural machine designed for efficient harvesting of forage crops. With its powerful engine and advanced technology, this harvester ensures high productivity and superior performance in the field. The free online manual provides detailed instructions on how to operate and maintain this machine, making it easy for users to maximize its capabilities and keep it running smoothly for years to come.