This document pertains to the Toyota TNV Diesel Engine, specifically designed for application in the Komatsu SK1020-5 Turbo. Engineered for robust performance and reliability, this turbocharged diesel engine is a critical component in heavy-duty machinery, built to withstand demanding operational environments. Its design emphasizes durability and efficiency, ensuring consistent power delivery for a wide range of industrial tasks. This Factory Service Repair Manual provides comprehensive guidance for the maintenance and repair of the Toyota TNV Diesel Engine. It covers essential engine and component repair procedures, technical specifications, and crucial safety guidelines. The manual is intended for use by qualified technicians who possess a foundational understanding of operation manuals and safety regulations, enabling them to perform scheduled maintenance and necessary repairs effectively to ensure the longevity and optimal performance of the engine.