The John Deere 4440 Tractor, manufactured approximately between 1978 and 1982, stands as a testament to robust engineering and reliable performance in the utility and row-crop agricultural sector. This powerful machine, known for its durable John Deere diesel engine, optional Sound-Gard™ cab, and versatile hydraulic system, was a popular choice for medium to large-scale farming operations. Competing with industry leaders, the 4440 was recognized for its workhorse capabilities, contributing significantly to John Deere's reputation for innovation and longevity in agricultural equipment. Its design prioritized operator comfort and safety, making it a dependable asset for demanding tasks. This Service Technical Manual (TM1182) provides comprehensive factory-level service and repair information for the John Deere 4440 Tractor. It covers all essential systems, including detailed troubleshooting and overhaul procedures for the engine, transmission, and hydraulics, alongside service information for electrical systems, steering, brakes, PTO, front axle, and operator station. The manual offers step-by-step repair instructions, diagnostic flowcharts, and critical technical specifications such as torque values and fluid capacities. Its purpose is to empower owners, mechanics, and technicians with the knowledge needed for effective maintenance, troubleshooting, and repair, ensuring maximum uptime and optimal performance of the tractor.