Komatsu D155A-6 Operation & Maintenance Manual page 152

OPERATION
CHECK ADDITIONAL WATER SEPARATOR, DRAIN WATER
The water separator is a device to separate water mixed with fuel. When draining water, fuel is drained together. Therefore,
never bring fire near the draining water.
When draining water, prepare for a container used for draining oil and take care not to spill drained water. The drained water
contains fuel and can catch fire. If it is spilt, wipe it off completely.
NOTICE
If float (1) goes above level line (2), there is danger that the separated water
may be sucked into the engine.
Always drain the water before float (1) reaches level line (2).
Before carring out this work, top off the fuel tank in reference to"CHECK FUEL LEVEL, ADD FUEL (PAGE 3-99)".
If the fuel is scarce, water may not well be drained.
Prepare a container to catch drain fuel.
1. Open inspection cover (3) on the rear left side of the machine.
Two water separators are provided inside the cover.
2. Put a container under drain hose (4) to catch drained fuel.
3. Loosen plug (5) to drain water.
4. If water is not drained, remove air intake plug (6). (Width across
flats: 13 mm)
Then water is drained through drain hose (4).
5. As soon as fuel begins to flow out after water has been
completely drained, screw in water drain plug (5).
Tightening torque: 2.9 - 3.9Nm {0.3 - 0.4kgm, 2.2 - 2.9lbft}
6. In case air intake plug (6) has been removed to drain water,
install it now.
Tightening torque: 7.8 - 9.8Nm {0.8 - 1.0kgm, 5.8 - 7.2lbft}
7. Close the inspection cover (3).
8. After completing the water drain operation, bleed the air. Use the same procedure as when replacing the fuel
filter cartridge.
For the air bleeding procedure, see "BLEED AIR FROM FUEL CIRCUIT (PAGE 4-50)".
WARNING
OPERATION
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