This workshop service manual provides comprehensive information for the Terex TC 20 and TC 25 Excavator. Engineered for demanding applications, these excavators are built with robust construction and reliable performance, making them a trusted choice for various industrial and construction tasks. This manual details the intricacies of these machines, ensuring their operational integrity and longevity. The purpose of this manual is to serve as a definitive guide for the maintenance, repair, and servicing of your Terex excavator. It covers essential procedures including routine maintenance, tune-ups, lubrication system servicing, and detailed repair and overhaul instructions for major components and proprietary systems. Furthermore, it includes diagnostic and troubleshooting guidance, identifies special tools, and emphasizes the importance of correct torque application for safety. This resource is designed for owners, mechanics, and technicians to effectively maintain and preserve the optimal performance of their equipment.