Komatsu D475A-5E0 Operation & Maintenance Manual page 145

OPERATION OPERATION
1. Open the inspection cover (3) on the left side of the machine.
2. Put a container under drain hose (4) to catch drained fuel.
3. Set valve (5) to the Close position (S).
4. Loosen plug (6) to drain water.
5. If water is not drained, remove air intake plug (7). (Width across
flats: 13 mm)
Then water is drained through drain hose (4).
6. As soon as fuel begins to flow out after water has been
completely drained, screw in water drain plug (6).
Tightening torque: 2.9 to 3.9 Nm {0.3 to 0.4 kgm, 2.2 to 2.9 lbft}
7. In case air intake plug (7) has been removed to drain water,
install it now.
Tightening torque: 7.8 to 9.8 Nm {0.8 to 1.0 kgm, 5.8 to 7.2 lbft}
8. Set valve (5) to the Open position (O).
9. Close the inspection cover (3).
10. 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 "BLEEDING AIR FROM FUEL CIRCUIT WITH THE ELECTRIC PRIMING
PUMP (PAGE 4-53)".
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OPERATION OPERATION