Preventing Fuel Contamination; Fuel Injection Pump; Cleaning The Fuel Pre-Filter - Doosan DP158L Series Operation & Maintenance Manual

4. Regular inspection
9. Turn it by 3/4 to 1 turn with a fuel filter wrench.
CAUTION
If you tighten the cartridge excessively, the screw may
be distorted or O-ring damaged.

Preventing fuel contamination

Most of the fuel contaminations encountered while using the
alternator engine are caused by water and propagation of
microbes.
Usually, the contamination results from improper handling of
fuel. Propagation of microbes requires water contained in the
fuel. To prevent propagation of microbes, you have to keep
the water to the minimum level possible in the storage tank.

Fuel injection pump

• Check the fuel injection pump housing, and replace it if
crack or damage is found.
• Check if the idle operaion and speed control lever's
sealing device was not removed.
• Chcek if the idling or speed control lever's sealing line is
not damaged.
• You should not modify the fuel injection pump if the
sealing line is damaged, such engine cannot receive
compensation.
• if the fuel injection pump is found abnormal, authorized
personnel should handle it.
• The adjustment and test of the fuel injection pump must
be conducted using a tester.
If you separate the parts where the seal ring (copper
seal ring, rubber coating seal ring, etc.) is assembled,
you should replace the seal ring with a new one. Other-
wise, leakage may occur in the fuel filter connections,
preventing normal functioning.

Cleaning the fuel pre-filter

The fuel pre-filter should be cleaned periodically through
disassembly. the fuel pre-filter is mounted individually for
DV2213020A
easy maintenance. Open the cover of the pre-filter and clean
the element with compressed air first, and then rinse it with
diesel fuel to remove foreign substances.
54
CAUTION
DV2213021C