The STEYR CS120, CS130, and CS150 tractors represent a line of robust and versatile agricultural machinery, known for their engineering quality and reliability. These tractors, likely produced in the late 1990s or early 2000s, are equipped with powerful diesel engines, advanced transmission options such as powershift or CVT, and are designed to handle a wide range of farming tasks. Their heritage as STEYR products, a brand with a long history in Austrian agricultural manufacturing, signifies a commitment to durable performance and operator comfort, making them a valuable asset for demanding agricultural operations. This comprehensive Service Repair Manual provides essential information for the maintenance, repair, and troubleshooting of STEYR CS series tractors. It covers critical systems including the engine, transmission, hydraulics, electrical systems, drivetrain, and braking. Detailed procedures for scheduled maintenance, component disassembly and reassembly, diagnostic guidance, and torque specifications are included, along with information on special tools. This manual is designed to assist both do-it-yourself owners and professional mechanics in efficiently maintaining their tractors, ensuring optimal performance and longevity while potentially saving on service costs.