The JCB JS145 Tracked Excavator, designed for robust performance in demanding construction and earthmoving applications, represents a commitment to engineering excellence and operational reliability. This model, typically identified by serial numbers within the range 1289000 - 1289999, features a powerful Isuzu 4HK1-XPT diesel engine, delivering approximately 100-110 HP from its 5.2-liter displacement. Its hydrostatic transmission and tracked drive system provide exceptional maneuverability and stability across varied terrains, while its substantial operating weight of approximately 14,500 - 15,500 kg underscores its heavy-duty capabilities. With a maximum digging depth of around 5,000 - 5,500 mm and a reach at ground level of approximately 7,500 - 8,000 mm, the JS145 is engineered for efficiency and productivity on any job site. This comprehensive Workshop Service Repair Manual provides essential information for the maintenance, repair, and technical understanding of the JCB JS145 Tracked Excavator. It covers critical areas including detailed engine specifications, transmission and drivetrain information, lubrication requirements, and filter replacement intervals. Furthermore, the manual includes operational and transport dimensions, along with performance specifications such as bucket capacity and digging capabilities. This resource is indispensable for owners, technicians, and mechanics seeking to ensure the longevity, optimal performance, and safe operation of their JS145 excavator through accurate and complete factory-level guidance.