This manual covers the Kubota V3800-CR-TE4B and V3800-CR-TIE4B engines, associated with Hyundai. These turbocharged, common rail direct injection diesel engines are engineered for robust performance and reliability, meeting Tier 4 emissions standards. With a displacement of 3.8 liters, they are designed for diverse applications across agricultural, industrial, and marine sectors, offering variable power outputs typically ranging from 90 to 120 horsepower. The V3800 series represents advanced engine technology, focusing on efficiency and durability for demanding operational environments. The purpose of this English-language Service and Repair Manual is to provide comprehensive guidance for technicians and service personnel. It details essential maintenance procedures, including recommended oil viscosity (SAE 10W-30 or 15W-40) and capacities, as well as typical service intervals for oil, fuel, and air filters, which are application-dependent. The manual also covers technical specifications, troubleshooting, and repair information necessary for the optimal upkeep and longevity of the V3800 engine family.