This Workshop Service Repair Manual covers the 400B, 410B, and 411B series tractors, likely produced from the mid-1960s to the early 1970s. is a historically significant manufacturer of agricultural machinery, renowned for producing robust and durable equipment. These tractors represent a line of utility or row-crop machines built upon established designs, offering reliable performance for agricultural applications. This manual provides the necessary information to maintain the inherent durability and operational efficiency of these machines. This comprehensive manual is designed to assist owners, independent mechanics, and agricultural repair shops in maintaining and repairing their tractors. It offers complete service and repair procedures for all aspects of the tractor, including detailed coverage of the engine, transmission, drivetrain, hydraulics, steering, brakes, and electrical systems. The manual includes step-by-step instructions for maintenance, troubleshooting, diagnostics, and overhaul procedures, empowering users to perform repairs and upkeep with expert-level guidance. The English-language manual is provided in a format, ensuring accessibility and permanence for future reference.