4. Regular inspection
52
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
irregular 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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