Komatsu ecot3 Operation And Maintenance Manual page 174

OPERATION
Inspection of Additional Water Separator and Drain of Water and Sediments
(Only poor fuel arrangement specification machines)
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 3-122)". If the fuel is
scarce, water may not well be drained.
Prepare a container to catch drain oil.
1. Open cover (3).
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: 14 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: 1.5 to 2.5 Nm (0.15 to 0.25 kgm, 1.1 to 1.8
lbft)
6. In case air intake plug (6) has been removed to drain water,
install it now.
Tightening torque: 8.0 to 12.0 Nm (0.8 to 1.2 kgm, 5.8 to 8.7
lbft)
7. Close cover (3).
8. After completing the water drain operation, bleed the air. Use
the same procedure as when replacing the fuel filter cartridge.
For details on bleeding the air, see "REPLACE FUEL
PRE-FILTER CARTRIDGE (PAGE 4-57)", "REPLACE FUEL
MAIN FILTER CARTRIDGE (PAGE 4-70)".
MACHINE OPERATIONS AND CONTROLS
WARNING
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