Preface
This Operation&Maintenance manual provides information on engine management and maintenance tech-
niques to customers and maintenance technicians who use Doosan Infracore's DE12 series (DE12, DE12T,
DE12TI and DE12TIS) diesel engine.
To provide the best engine to our customers, DE12 series (DE12, DE12T, DE12TI and DE12TIS) diesel engine
is designed to satisfy all requirements for low noise, economic fuel consumption, high speed and durability with
our latest technology and quality.
Exact operation and proper maintenance is essential for operating engines with the optimum conditions and
best performance. This Operation&Maintenance manual provides detailed description of specifications, speci-
fied values, fault diagnosis, component diagrams, and drawings for easier and more precise understanding of
the product and proper maintenance and troubleshooting.
With our recommended working methods and procedures, high-level maintenance techniques and safety of
workers can be ensured. Please read and understand this manual before working with out engines.
We, Doosan Infracore, continue development and investment for best performance, improved quality, and
enhanced maintenance techniques. The design of our product may be changed without prior notice and without
any liability and this manual may not contain all of changes in design made to improve the product.
We do ou
r best to provide more convenient and safe maintenance techniques and meet the requirements of cus-
tomers.
If you have any question or find any error in this Operation&Maintenance manual, please contact us.
Thank you for purchasing our engine and we hope this Operation&Maintenance manual be helpful for you.
Doosan Infracore Co., Ltd.
2020.06.
950106-029004EN
* Items ex
empted from warranty coverage
Malfunctions resulting from failing to comply with the proper handling instructions, regular inspections, and
machine storage techniques specified in the user manual
Malfunctions resulting from failing to have the machine repaired at a designated dealer or center, or
resulting from the use of non-genuine parts
Malfunctions resulting from unauthorized modifications, changes, or external hardware
Malfunctions resulting from incorrect operation by the user, delayed repairs, accidents, and natural disas-
ters
* The contents of this operation and maintenance manual are the exclusive property of Doosan Infracore. Any unau-
thorized reproduction, printing and distribution thereof are strictly prohibited.
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