This workshop service manual provides comprehensive information for the Terex TC 125. Designed for mechanical technicians familiar with Terex products, this manual focuses on the repair and overhaul of the TC 125, including its proprietary components. It details special aspects of the product, routine maintenance, servicing, and diagnostic and repair procedures to ensure optimal performance and longevity. The scope of this manual covers a wide range of essential topics, including tune-ups, maintenance schedules, removal and installation procedures, assemblies and disassemblies, and detailed guidance on the fuel system, ignition, lubrication system, exhaust, electrical system, body, engine, and transmission. It also highlights key symbols such as WARNING, CAUTION, and NOTE, and references necessary tools, including special Terex TC 125 tools. The goal is to empower owners and technicians to achieve professional-level repairs and maximize the value of their equipment.