This comprehensive Owners Operators Manual provides detailed instructions for using, operating, and maintaining your New Holland 648, 658, 678, or 688 agricultural machinery. It covers all models and engine types within the specified year range, ensuring you have the information required for safe and efficient operation. The manual is packed with information on every aspect of owning and operating your equipment, including routine maintenance procedures. You'll find detailed explanations and diagrams to guide you through every step, from basic operation to troubleshooting and repair. This manual is your essential resource for maximizing the performance and longevity of your New Holland equipment.