The JCB JS145 Tracked Excavator is engineered for robust performance and reliability in demanding construction and earthmoving applications. Built with precision and durability in mind, this model offers a powerful hydrostatic drive system with infinitely variable speed control, allowing for efficient operation across various terrains. Its substantial operating weight, typically between 14,000 and 15,000 kg, combined with impressive digging capabilities, including a maximum digging depth of up to 6.2 meters and a reach of nearly 9 meters, makes it a versatile and capable machine for complex projects. This Workshop Repair Service Manual provides comprehensive guidance for the maintenance, service, and troubleshooting of the JCB JS145 Tracked Excavator, serial numbers 1289000 to 1289999. It covers essential areas such as engine specifications, fluid capacities, scheduled maintenance intervals for engine oil and hydraulic oil, and detailed technical data. The manual is designed to assist owners, operators, and technicians in ensuring the optimal performance, longevity, and safety of their equipment through accurate procedures and technical insights.