The JCB JS115 Tracked Excavator, designed for demanding construction and earthmoving applications, exemplifies robust engineering and operational efficiency. Powered by a Perkins 1104C-44T diesel engine delivering 94 HP, this machine offers a substantial operating weight of 11,500 kg and a bucket capacity of 0.47 m³. Its hydrostatic transmission and tracked drive system provide excellent traction and maneuverability on challenging terrain. Adhering to Tier 3 emission standards, the JS115 is built for reliability and performance in various professional environments, featuring a maximum digging depth of 5730 mm and a reach of 8640 mm at ground level. This Workshop Repair Service Manual provides comprehensive guidance for the maintenance, service, and troubleshooting of the JCB JS115 Tracked Excavator, serial numbers 1703500 to 1703599. It covers essential procedures, including engine oil changes at 500-hour intervals, and details critical fluid capacities for engine oil (9.5 liters), coolant (18 liters), and hydraulic oil (130 liters). The manual is an indispensable resource for owners, technicians, and mechanics, offering detailed technical specifications and step-by-step instructions to ensure the optimal performance, longevity, and safe operation of the equipment.