This manual covers the New Holland Kobelco E385 (Tier 3) equipped with the 4HK1-6HK1 Isuzu Diesel Engine. Designed for demanding operational environments, this excavator represents robust engineering and reliable performance. Its advanced systems and durable construction are intended to provide efficient and dependable service across a wide range of applications. Understanding the intricacies of this machine is key to maximizing its operational lifespan and productivity. The purpose of this comprehensive manual is to serve as an essential resource for maintaining and repairing the New Holland Kobelco E385. It provides detailed information across various critical systems, including the engine mechanical components, cooling system, fuel system, engine electricals, exhaust system, and turbocharger. Within each chapter, you will find sections on structure and function, testing and adjusting, disassembly and assembly, and maintenance standards. This content is designed to equip owners, mechanics, and technicians with the knowledge necessary for accurate diagnostics, effective repairs, and proper upkeep, ensuring the vehicle operates at its peak performance.