Doosan D55C-9 - Discharge of Foreign Matter in the Fuel; Water Separator

Maintenance Section
-138-
Water Separator
1. If the engine check lamp indicates any fault related to
water separator, remove the water in the separator
immediately, regardless of regular maintenance
schedule. (SPN 97)
2. Lower part of the fuel filter is the water separator, in
which a sensor is installed to monitor water and
contaminants and transmit warning signal to the
indicator to notify the operator of the water accumulated
in the separator.
3. Drain the water in the water separator as follows.
4. Place an approved container under the water separator
for collecting the water and contaminants.
5. Open the drain cock on the bottom of the water
separator of the fuel filter. Drain the water in the water
separator. (Figure, 1 for Main Filter Only, 2 for Pre Filter
Option)
6. Close the drain cock by hand.
7. Having completed above procedures, check that the
fuel system is filled with fuel. Filling fuel system with fuel.
WARNING
Prior to any service or maintenance activity, Test
Fuel System for Leaks.
Discharge of Foreign Matter in the
Fuel
The pressure sensor warning function is activated when
foreign substances are detected in the fuel. Once
triggered, one or all of the following may be activated
depending on the vehicle settings: warning buzzer,
engine check lamp illumination, and derating of engine
power. In the event that the pressure sensor warning is
triggered, check the system as follows:
1. Take off the fuel tank cover and remove the filter.
2. Wipe foreign substances off the filter with a clean
cloth or blow them off using an air compressor.
3. Put the filter and cover back on the fuel tank.
4. Turn the key ON after assembly, and check that the
warning function operates normally.
5. If the pressure sensor warning persists, replace the
fuel filter cartridge. This is one of the items described
in the sub-section: “Every 500 Service Hours or 3
Months”.
NOTICE
Be careful not to damage the fuel tank's filter when
cleaning it. A damaged filter may lead to contamination
with foreign substances, resulting in a serious engine
problem.
WARNING
Before servicing or maintenance, test the fuel
system for leaks.