Doosan G20E-5, Operation & Maintenance Manual, Page: 155 / 210

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Maintenance Section Maintenance Section
4TNE98 Diesel Engine Only 4TNE98 Diesel Engine Only
NEVER wait until the scheduled periodic NEVER wait until the scheduled periodic
maintenance if the fuel filter indicator comes on.
maintenance if the fuel filter indicator comes on.
The fuel filter / water The fuel filter / water separator contains a sensor to separator contains a sensor to
detect the amount of water and contaminants. This detect the amount of water and contaminants. This
sensor sends a signal to an indicator to alert the
sensor sends a signal to an indicator to alert the
operator. operator.
Drain the fuel filter / water separa Drain the fuel filter / water separator as follows: tor as follows:
1. 1. Position an approved container under the fuel Position an approved container under the fuel
filter / water separator
filter / water separator (Figure 5-1, (1)) (Figure 5-1, (1)) to to
collect the c collect the contaminants. ontaminants.
2. 2. Loosen the drain cock Loosen the drain cock (Figure 5-1, (2)) (Figure 5-1, (2)) at the at the
bottom of the fuel filter / water separator. Drain bottom of the fuel filter / water separator. Drain
any water
any water collect collected inside. ed inside.
3. 3. Hand tighten the drain cock. Hand tighten the drain cock.
4. 4. Be sure to prime the diesel fuel system when Be sure to prime the diesel fuel system when
you are done. See Priming the Fuel System.
you are done. See Priming the Fuel System.
Fig Fig ure 5- ure 5-1 1
Test Fuel System for Leaks(LP and Dual Fuel Test Fuel System for Leaks(LP and Dual Fuel
Engines Only)
Engines Only)
1. 1. Obtain a leak check squirt bottle or pump spray Obtain a leak check squirt bottle or pump spray
bottle.
bottle.
2. 2. Fill the bottle with an approved leak check Fill the bottle with an approved leak check
solution.
solution.
3. 3. Spray a generous amount of the solution on the Spray a generous amount of the solution on the
fuel system fuel lines and connections, starting
fuel system fuel lines and connections, starting
at the storage container. at the storage container.
4. 4. Wait approximately 15-60 seconds then Wait approximately 15-60 seconds then
perform a visual inspection of the fuel system.
perform a visual inspection of the fuel system.
Leaks will cause the solution to bubble.
Leaks will cause the solution to bubble.
5. 5. Repair any leaks before Repair any leaks before continuing. continuing.
6. 6. Crank the engine through several revolutions. Crank the engine through several revolutions.
This will energize the fuel lock-off and
This will energize the fuel lock-off and allow fuel allow fuel
to flow to the pressure regulator/converter. to flow to the pressure regulator/converter.
Apply additional leak check solution to the
Apply additional leak check solution to the
regulator/converter
fuel connections and regulator/converter fuel connections and
housing. Repeat leak inspection as listed housing. Repeat leak inspection as listed
above.
above.
7. 7. Repair any fuel Repair any fuel leaks before continuing. leaks before continuing.
WARNING WARNING
Prior to any service or maintenance activity, Prior to any service or maintenance activity,
Test Fuel System for Leaks.
Test Fuel System for Leaks.
Check Check
Points
Points