This document provides comprehensive service information for Steyr 9105a and 9115a tractors. Steyr, an Austrian manufacturer renowned for its robust agricultural machinery, produced these tractors as part of its modern '9000' series, often incorporating advanced technology for their time. These models, likely powered by diesel engines producing approximately 105-115 horsepower, are designed for demanding agricultural tasks. They typically feature Synchromesh or Powershift transmissions, PTO engagement, differential locks, and hydraulic power steering, all contributing to their operational efficiency and versatility. The engineering quality and reliability inherent in Steyr products are supported by detailed technical specifications and operational guidance found within this manual. This Full Service Repair Manual / Workshop Service Repair Manual is designed to be an indispensable resource for technicians, mechanics, and farm equipment owners involved in the maintenance and repair of Steyr 9105a/9115a tractors. It covers a vast array of systems, including general maintenance, troubleshooting, engine service, transmission repair, brake systems, electrical systems, suspension, cooling systems, fuel injection, and more. The manual provides step-by-step instructions for repair operations, diagnostic procedures, and scheduled maintenance, along with crucial safety guidelines. Its factory-level detail ensures accuracy and completeness, enabling users to perform effective repairs, optimize performance, and ensure the longevity of their equipment.