Here is the set of technical documentation related to the WD615 series generating set diesel engine. It comprises of the Operation and Maintenance Manual, two emergency diesel generator spare parts catalogues, technical data for the unit, and a complete set of drawings. It is a must have pack of documents for crew members dealing with the operation and maintenance of this machinery piece. WD615 series high-speed diesel engine is made in China by introducing foreign technology. It is characterized by compact structure, reliable operation, excellent power, economical and technical performance, rapid starting, simple operation, and easy maintenance. Especially the advanced emission not only comply with the provisions of EURO I emission regulations but also meets EURO II emission standard. It is an ideal power for heavy-duty vehicles, construction machinery, power generating equipment and fishing vessel and high speed boat. This manual introduces the main technical data, performance parameters, structure features, operation and maintenance of WD615 series diesel engine for power generating. If users operate the engine according to the stipulations of this manual, the Iifespan of the diesel engine should be extended greatly. During repair, disassembly and assembly of the engine, read the Maintenance Manual for WD615 Series Diesel Engine carefully and purchase parts according to the Illustrated Parts Catalogue for WD615 Series Diesel Engine.