The JCB JS290 is a Tier 3 Auto Tracked Excavator designed for robust performance in demanding environments. Featuring a powerful Cummins QSB6.7 diesel engine that delivers 214 hp (159 kW) and a displacement of 6.7 liters, this machine is engineered for efficiency and reliability. With an operating weight of 28,990 kg and advanced hydrostatic transmission, the JS290 offers exceptional power and control for a wide range of construction and excavation tasks. Its impressive digging depth of 6620 mm and reach at ground level of 10030 mm, coupled with a standard bucket capacity of 1.54 m³, make it a versatile and productive asset. This Workshop Repair Service Manual in English provides comprehensive guidance for the JCB JS290 Auto Tracked Excavator, serial number range 1421200 onwards. It covers essential service, maintenance, and troubleshooting procedures to ensure optimal operation and longevity of the equipment. Detailed technical specifications, including engine oil type and capacity, hydraulic system oil capacity, and coolant capacity, are included to facilitate proper upkeep. This manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain and repair the JS290 effectively.