This full service repair manual covers the Fiat Trattori 355-C, a crawler tractor likely produced from the 1970s into the 1980s. Designed for agricultural and utility work, this model embodies the robust engineering and reliability characteristic of Fiat Trattori's extensive tractor lineage. Its crawler configuration provides excellent traction and stability on challenging terrain, making it a dependable workhorse for various demanding tasks. The 355-C is powered by a diesel engine, typically in the 35-45 HP range, and features a manual transmission with multiple forward and reverse gears, often including a high-low range splitter or creeper gear for enhanced operational versatility. This comprehensive manual is designed to assist professional technicians and experienced DIY mechanics in the repair, maintenance, rebuild, refurbishment, and restoration of the Fiat Trattori 355-C. It provides detailed, step-by-step instructions, professional-level diagnostics, and clear illustrations covering all major systems, including the engine, transmission, drivetrain, braking, steering, hydraulic, and electrical systems. The manual also includes maintenance schedules, troubleshooting guides, and wiring diagrams, ensuring that owners and technicians have the necessary information to keep the tractor operating at peak performance and to address any issues that may arise.