This manual covers the Kubota V2607 and V3307 Series Diesel Engines, including variants such as V2607-CR-E4B, V2607-CR-TE4B, V2607-CR-TIE4B, V3307-CR-TE4B, and V3307-CR-TIE4B. These engines are designed as liquid-cooled, 4-stroke diesel engines with direct injection and electric starters. The V2607 features a 2.607 L displacement with an inline 4-cylinder configuration, while the V3307 offers a 3.307 L displacement, also with an inline 4-cylinder setup. Specific variants incorporate turbochargers and Diesel Oxidation Catalyst (DOC) for emission control, meeting E4B emission standards. These engines are engineered for reliability and performance in various applications. The purpose of this Service Repair Manual is to provide comprehensive guidance for the maintenance, repair, and technical understanding of the Kubota V2607 and V3307 Series Diesel Engines. It details essential procedures for engine oil and filter changes, fuel filter replacement, and coolant management, alongside recommended service intervals. Technical specifications, including engine dimensions, fuel system details, and emission control systems, are included to aid in accurate diagnostics and repairs. This manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure the optimal performance and longevity of these engines.