The Hitachi ZX 250LCN-3 is a robust construction machine engineered for demanding tasks. Powered by an Isuzu AA-6BG1T diesel engine, it delivers 125 kW of power and 670 Nm of torque, featuring a 6.5 L displacement and Tier 3 / Stage IIIA compliant emissions control. Its hydrostatic transmission, with two-speed variable displacement piston motors, ensures efficient power delivery. With an operating weight of approximately 24,200 kg, a maximum digging depth of 6.63 meters, and a reach of 9.93 meters, this excavator is designed for significant earthmoving operations. The machine's dimensions, including an overall length of 9.66 meters and width of 3.19 meters, are optimized for stability and performance on various job sites. This Workshop Service Manual provides comprehensive information for the Hitachi ZX 250LCN-3. It covers essential maintenance procedures, including lubrication capacities for engine oil (22.0 L), hydraulic oil (200 L), and coolant (26.0 L), along with service intervals for engine oil filters (every 500 hours) and hydraulic oil filters (every 1000 hours). Technical specifications detail engine performance, transmission, and machine dimensions, while safety guidelines are included to ensure proper operation. This manual serves as an indispensable resource for owners, mechanics, and technicians, enabling effective maintenance, troubleshooting, and repair to keep the ZX 250LCN-3 operating at peak efficiency.