This manual covers the Kubota 70mm Stroke Series Diesel Engines, including models Z500-B, Z600B, ZH600-B, D650-B, D750-B, D850-B, DH850-B, D950-B, VH1100-B, and V1200-B. These engines are recognized for their robust engineering and reliability, designed for demanding applications where consistent performance is essential. The 70mm stroke length is a key characteristic of this series, contributing to their efficient operation. This comprehensive service manual provides detailed information for the maintenance, repair, and troubleshooting of the specified Kubota diesel engines. It includes step-by-step instructions, clear illustrations, and diagnostic procedures for various systems such as the fuel, cooling, lubrication, and electrical systems. The manual is an essential resource for owners, mechanics, and technicians to ensure optimal performance and longevity of their equipment.