Komatsu HB365LC-3 Operation & Maintenance Manual page 222

MACHINE OPERATIONS AND CONTROLS
2.
Turn drain valve (2) to OPEN position (O) to drain all the
sediment and water accumulated at the bottom together
with fuel.
3.
When only the clean fuel flows out, turn drain valve (2) to
CLOSE position (S).
METHOD FOR CHECKING WATER SEPARATOR, DRAINING WATER AND SEDI-
MENT
1.
Open the door on the right side of the machine.
2.
Check for water and sediment.
It is possible to judge the water level and amount of sedi-
ment by looking through transparent cup (2).
NOTICE
If the water in transparent cup (2) freezes, wait until
the frozen water has melted completely, then follow
the procedure to drain the water.
3.
Place a container to catch the water under the drain hose
(3).
4.
Loosen the drain valve (4) and drain the water.
5.
When fuel starts to drain from the drain hose (3), tighten
the drain valve (4) immediately.
On this machine, a sensor is installed to detect if water ac-
cumulates in transparent cup (2).
When the water separator caution lamp (5) lights up in red
on the machine monitor, it indicates that water is accumu-
lated in transparent cup (2).
In this case also, use the procedure above to drain the wa-
ter.
REMARK
When only the water separator caution lamp lights up, it
lights up in the position shown in the figure. If other caution
lamps also light up at the same time, the water separator
caution lamp lights up at a different position.
NOTICE
If the water accumulated in transparent cup (2) has been frozen, the water separator caution lamp
may not light up. After the engine is started, as the temperature around fuel prefilter (1) increases,
the frozen water melts and the water separator caution lamp may suddenly light up. In cold season,
even if the water separator caution lamp is not lit, drain the water frequently.
REMARK
• If transparent cup (2) is dirty and it is difficult to see the inside, clean the transparent cup (2) when re-
placing the fuel prefilter cartridge (1).
• When the drain valve (4) has been removed during the cleaning operation, coat the O-ring with grease
and tighten it until it contacts the bottom.
If the drain valve (4) is hard to move, adjust it so that it moves smoothly by referring to "METHOD FOR AD-
JUSTING DRAIN VALVE (3-151)".
3-150
OPERATION