This service repair manual covers the Komatsu 82E-98E Series Diesel Engines, designed for robust performance and reliability in various demanding applications. These engines, featuring an indirect injection system, are integral to a range of heavy equipment, including models such as the PC27MR-2, WA30-5, and D20A-8, among others. The engineering quality of Komatsu ensures dependable operation, making these engines a preferred choice for industrial and construction machinery. This comprehensive 206-page English-language manual provides detailed instructions for the service and repair of the Komatsu 82E-98E Series Diesel Engines. It includes step-by-step procedures for repair, servicing, technical maintenance, and troubleshooting, supported by actual photo illustrations, schemes, and electrical and hydraulic diagrams. The manual is organized into clear sections covering general information, inspection, adjustment, disassembly, reassembly, system-specific maintenance (lubrication, cooling, fuel injection), and technical specifications like service standards and tightening torques, ensuring that owners, mechanics, and technicians have the necessary resources to maintain optimal engine performance and longevity.