This workshop service repair manual covers the MAN D0836 Series marine diesel engines, including the LE301, LE401, and LE402 models. These engines are engineered for marine applications, featuring a 6-cylinder configuration and water cooling. While specific power outputs are not detailed here, this series is known for its robust construction and reliable performance in demanding maritime environments. This manual is designed to provide comprehensive information for the maintenance and repair of these engines. The purpose of this English-language manual is to equip owners, technicians, and mechanics with the necessary knowledge to effectively maintain and service their MAN D0836 Series engines. It includes detailed sections on safety instructions, engine overhaul procedures, commissioning, troubleshooting via a fault table, lubrication schedules, and in-depth guidance on the fuel, cooling, lubrication, intake, and exhaust systems. Furthermore, it covers cylinder head and crankgear/piston assemblies, attachments, service data, and special tools, ensuring that all aspects of engine care are addressed.