The Zetor 3320-6340 Series Tractors, originating from a manufacturer with a long heritage in robust agricultural machinery, represent a significant generation of utility tractors. These models are recognized for their reliability and versatility, making them suitable for a wide range of agricultural and industrial applications. Typically powered by Zetor's in-line diesel engines, offering a power range from approximately 35 to 60 horsepower, they feature direct injection fuel systems and liquid-cooled configurations. The transmission systems are predominantly manual with synchronized gears, often available in 2WD or 4WD, and can include various gear configurations. These tractors are engineered for durability, with features like hydraulic wet disc brakes and ROPS for enhanced safety, embodying the brand's commitment to practical and dependable performance. This comprehensive factory service repair manual provides essential information for the Zetor 3320, 3340, 4320, 4340, 5320, 5340, 6320, and 6340 tractor models. It covers all aspects of maintenance, troubleshooting, and repair, from routine servicing and fluid checks to complete engine, transmission, and hydraulic system overhauls. Detailed procedures are provided for all major systems, including the engine, drivetrain, hydraulics, electrical systems, chassis, and operator station. The manual includes diagnostic flowcharts, wiring diagrams, torque specifications, and troubleshooting guides for common issues, enabling owners and technicians to maintain and repair these tractors efficiently and accurately, ensuring optimal performance and longevity.