Komatsu ecot3 Operation And Maintenance Manual page 171

MACHINE OPERATIONS AND CONTROLS
Checks Before Starting
Always check the items in this section before starting the engine each day.
Drain Water And Sediment from Fuel Tank
1. Open the door at the right of the machine.
2. Set a container under drain hose (1) to catch the drained fuel.
3. Turn drain valve (2) to the OPEN (O) position and drain all the
sediment and water accumulated at the bottom together with
the fuel.
4. When clean fuel comes out, turn drain valve (2) to the CLOSE
(S) position.
5. Close the door.
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OPERATION