4. Regular inspection
54
Fuel system
General Information
The fuel injection pump and nozzle are composed of very
sophisticated components with high precision. If fuel is
mixed with foreign substance, it may clock the nozzle or
the fuel injection pump components may be seized. So,
be sure to keep the fuel system clean all the time.
Fuel Standards
The quality of fuel is very important to satisfy the engine
performance, extension of engine life and the allowable
exhaust gas level. Doosan engine engine is designed to
use diesel fuel available in the local market. If you want
the optimum engine performance, select the proper fuel
referring to the fuel selection table below.
• Low Sulfur Diesel
Note) High sulphur content in diesel fuel Doosan diesel
engines can be operated with fuels whose sulphur
content is max. 0.05wt%. Fuels with a sulphur
content of > 0.05wt% are not permitted as they
result in increased corrosion and hence greatly
reduce the service life of engines. The oil change
intervals must be halves if the sulphur content is >
0.02wt%.
• Use clean, certified and qualified fuel only. Using
i
rregular or unspecified fuel may cause critical
damage and faults to the engine.
• Replenish fuel while the engine is stopped.
Fuel Ingredients Unit Standard Product
Specific Gravity (kg/lit) - 0.83
Flash Point
(°C)
>
40
47.8
Viscosity (40°C) (cSt) 1.955 2.459
Sulfur content (wt%) < 0.05 0.038
Cloud point
(°C)
--3
Pour Point
(°C)
< -17.5 -27.2
Low temperature filter clogging point
(°C)
< -12 -18
Color (ASTM) < 2.5 0.7
Carbon Residue (10%) Distillation residue (wt) (%) < 0.15 0.08
Total acid value (mg KOH/g) < 0.40 0.03
Copper corrosion (100°C, 3 hrs) < 1 1 - a
Ash content (wt) (%) < 0.01 0.001
Moisture and Precipitate (vol. %) < 0.01 0.005
Cetane Index >
45
52
Distillation test tem-
perature
50% Distillation Point
(°C)
- 264.4
90% Distillation Point
(°C)
< 360 344.3
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