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Preface
The N485D, N490D diesel engines are four-cylinder, in-line, water-cooled, four-stroke diesel
engines, which has the advantages of compact structure, beautiful appearance, easy to operate,
good rigidity, stable performance, long service life, good economical efficiency and high
serialization, etc. It is the ideal power unit for diesel generator set. However, the good
performance of product is closely associated with a good care. In order to make the user be
familiar with the structure and performance of the diesel engine, and correctly judge & maintain
its faults, this manual is prepared with pictures and words for the user to know the diesel engine
well, which is an important guarantee for better performance, good reliability and long service
life of the diesel engine.
The main purpose of this manual is to give users a better understanding of the diesel engine.
Therefore, the manual consists of various assembly views, detailed descriptions of disassembly
and assembly, step-by-step instructions of judgment, maintenance and repair, though which
users can operate and maintain the diesel engine well and master the operation and maintenance
technologies as soon as possible to ensure the normal, reliable and efficient operation of diesel
engine.
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