1. The John Deere 9660 Combine TM2161 online PDF manual is a comprehensive guide designed to assist users in operating and maintaining their equipment effectively. This manual provides detailed instructions, diagrams, and troubleshooting tips to ensure optimal performance and longevity of the John Deere 9660 Combine. With easy access to this digital resource, users can quickly reference information to address any issues that may arise during operation, making it an essential tool for owners and operators of this machinery.