The Steyr Kompakt 4055S and 4065S Ecotech are compact utility tractors engineered for versatility and reliability across diverse agricultural, horticultural, and municipal tasks. These models are designed to offer efficient performance and robust build quality, characteristic of Steyr's long-standing reputation in agricultural machinery. Featuring Ecotech engines focused on fuel efficiency and reduced emissions, along with a compact design for enhanced maneuverability, these tractors are well-suited for operations requiring precision and agility in various working environments. Their inherent versatility is further amplified by standard Power Take-Off (PTO) and three-point hitch systems, enabling the use of a wide array of implements. This comprehensive 1889-page Service Repair Manual in English provides in-depth technical information for the Steyr Kompakt 4055S / 4065S Ecotech. It covers all essential systems, including the engine, transmission, hydraulics, electrical system, chassis, front axle, and brake system. The manual details scheduled maintenance, component rebuilds, troubleshooting charts, torque specifications, adjustment procedures, and includes vital wiring diagrams and hydraulic schematics. Its purpose is to equip owners, mechanics, and technicians with the knowledge required for accurate diagnostics, effective maintenance, and complete repair of these tractors, ensuring optimal performance and longevity.