The Hitachi Zaxis 240 N 3 is a robust construction machine designed for demanding operational environments. Featuring a powerful 6.67 L diesel engine and a hydrostatic transmission with variable gears, this excavator is engineered for efficiency and performance. Its substantial operating weight of 23,500 kg, coupled with dimensions of 9.87 m in length, 2.99 m in width, and 3.04 m in height, indicates its capacity for significant earthmoving tasks. The advanced hydraulic system, capable of a 224 L/min flow rate and 33.3 MPa pressure, ensures precise control and power delivery for a wide range of applications. This Workshop Service Repair Manual provides comprehensive guidance for the Hitachi Zaxis 240 N 3, written in English for mechanical technicians. It covers essential maintenance schedules, including engine oil changes every 250 hours and hydraulic oil servicing every 2000 hours, along with detailed fluid capacities for engine oil (27 L), hydraulic tank (139 L), and coolant (30 L). The manual also includes technical specifications for the undercarriage, such as a track gauge of 2.39 m and ground clearance of 0.46 m, alongside other critical operational data. Its purpose is to facilitate effective maintenance, repair, and optimal performance of the equipment.