This comprehensive workshop service and repair manual provides detailed instructions and illustrations for servicing and repairing the Fendt 309, 310, 311, and 312 Vario COM III tractors. This manual is a valuable resource for anyone who works on these tractors, offering a wealth of information that can help you save money on repair bills and keep your tractor in optimal condition. The manual covers a wide range of topics, including: * **Tractor/General System:** This section covers the overall design and operation of the tractor, including the chassis, engine, transmission, and hydraulic systems. * **Transmission:** The transmission section provides detailed information on the Vario transmission unit, including its operation, maintenance, and troubleshooting. * **Engine:** This section covers the engine's components, including the cylinder head, cooling system, fuel system, and lubrication system, providing detailed information about their operation, maintenance, and troubleshooting. * **Front Axle:** This section covers the design, operation, and maintenance of the front axle, including the suspension system, steering system, and drive system. * **Vehicle Body:** This section covers the design and operation of the vehicle's body, including the cab, driver's seat, trailer hitch, and air conditioning system. * **Power Lift:** This section covers the design and operation of the power lift system, including the hydraulics, controls, and maintenance procedures. * **Electrics:** This section covers the electrical system of the tractor, including the battery system, alternator, starter motor, and various electrical components. * **Hydraulics:** This section covers the hydraulic system of the tractor, including the pumps, valves, cylinders, and pipes, providing detailed information on their operation and maintenance. * **Electronics:** This section covers the electronics system of the tractor, including the instrument panel, terminal, LBS Agricultural Bus System, transducers, sensors, and ECU systems. * **Service:** This section covers various service procedures, including maintenance schedules, lubrication points, and special tools required for servicing the tractor. * **Technical Information & Specifications:** This section provides detailed technical specifications for the tractor, including engine specifications, transmission specifications, and hydraulic specifications. This manual is a valuable tool for anyone who works on Fendt 309, 310, 311, and 312 Vario COM III tractors. It provides detailed information that can help you diagnose and repair problems, perform routine maintenance, and keep your tractor running smoothly.

The Fendt 309, 310, 311, and 312 Vario COM III tractors represent a powerful and versatile range of agricultural machinery designed for a wide array of tasks. These tractors are part of the renowned Fendt Vario series, known for their innovative technology and high performance. The "Vario" designation signifies the presence of a continuously variable transmission system, providing seamless gear changes and optimal power delivery in all working conditions. The COM III models are a significant upgrade from their predecessors, featuring advanced electronic control systems that enhance efficiency and operator comfort. These tractors are equipped with powerful Deutz engines, known for their robust construction and fuel efficiency. They also boast a range of features like a hydraulic system with high lifting capacity, a spacious and ergonomically-designed cab, and a comprehensive suite of safety features, making them a reliable and safe choice for farmers and agricultural professionals. The Fendt 309, 310, 311, and 312 Vario COM III tractors are highly adaptable machines suitable for a wide range of applications. From plowing and tilling to harvesting and transporting, these tractors deliver the necessary power and precision to handle demanding agricultural tasks. The Vario transmission provides exceptional fuel economy and operator comfort by eliminating the need for gear shifting, allowing the driver to focus on the job at hand. The advanced electronic control systems offer greater control over the tractor's performance, enabling customization of settings for optimal efficiency in various operating conditions. The spacious and comfortable cab boasts excellent visibility and intuitive controls, reducing operator fatigue and promoting greater productivity. With their robust construction, reliable performance, and advanced technology, the Fendt 309, 310, 311, and 312 Vario COM III tractors are a testament to Fendt's commitment to innovation and quality in agricultural machinery.