Komatsu HB215LC-3, Operation & Maintenance Manual

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5.
When fuel starts to be drained from the drain hose (3),
tighten the drain valve (4) immediately to stop draining.
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.
If the drain valve (4) is hard to move, adjust it so that it moves smoothly.
METHOD FOR ADJUSTING DRAIN VALVE
1.
Turn the valve (6) at the bottom of the fuel tank to CLOSE
position (S).
2.
Place a container under the fuel prefilter cartridge to catch
the fuel.
3.
Loosen the drain valve (4) and drain water and sediment
from transparent cup (2), and also drain all the fuel accu-
mulated in the fuel prefilter cartridge (1).
4.
Check that nothing more comes out from the drain hose
(3), then remove the drain valve (4).
5.
Apply a suitable amount of grease to the O-ring (7).
REMARK
When applying the grease, be careful not to allow the
grease to adhere to the water drain port (8) and threaded
part (9) of the drain valve.
6.
Tighten the drain valve (4) by hand until it contacts the bot-
tom of the transparent cup (2).
7.
Remove the fuel container.
OPERATION MACHINE OPERATIONS AND CONTROLS
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