5.5.3. Fuel system checks
Fill the tank with the recommended fuel. Keeping tanks full reduces water condensation and
helps keep fuel cool, which is important to engine performance.
Make sure fuel supply valves (if used) are open.
To insure prompt starting and even running, the fuel system must be primed with the fuel feed
pump manually before starting the engine the first time, or after a fuel filter change.
Refill at the end of each day’s operation to prevent condensation from contaminating the fuel.
Condensation formed in a partially filled tank promotes the growth of microbial organisms that
can clog fuel filters and restrict fuel flow.
If the engine is equipped with a fuel water separator, drain off any water that has accumulated.
Water in fuel can seriously affect engine performance and may cause engine damage.
DAEWOO recommends installation of a fuel water separator on generator units.
•
Air removal of fuel system
The suction room of fuel injection pump has the function of air removal continuously during
the operation through a relief valve.
In case that the suction room lacks fuel at all, for instance, in case of new installation of
injection pump, after loosening the air removing screws of cartridge filter respectively,
remove the air by operating the manual pump of fuel supply pump until bubble will disap-
pear.
•
Fuel supply pump
Every time of engine oil replacement, the fuel strainer installed at the fuel supply pump should
be removed and cleaned.
5.5.4. Fuel contamination and water trap
In the generator environment, the most likely fuel contaminants are water amicrobial growth
(black “slime”). Generally, this type of contamination is the result of poor fuel handling prac-
tices. Black “slime” requires water in the fuel to form and grow, so the best prevention is to keep
water content to a minimum in storage tanks.
If diesel fuel which contains moisture is used the injection system and the cylinder liners / pis-
tons will be damaged. This can be prevented to same extent by filling the tank as soon as the
engine is switched off while the fuel tank is still warm (formation of condensation is prevented).
Drain moisture from storage tanks regularly. Installation of a water trap upstream of the fuel fil-
ter is also advisable.
NOTICE:
A galvanized steel tank should never be used for fuel storage, because the fuel oil reacts
chemically with the zinc coating to form powdery flakes which can quickly clog the fuel filters
and damage the fuel pump and injection nozzles.
- 41 -
Summary of Contents for D1146
Page 1: ......
Page 57: ...7 2 Trouble Shooting 53 ...
Page 58: ... 54 ...
Page 59: ... 55 ...
Page 60: ... 56 ...
Page 61: ... 57 ...
Page 62: ... 58 ...
Page 63: ... 59 ...