Komatsu PC350LC-8, Operation & Maintenance Manual

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OPERATION
MACHINE OPERATIONS AND CONTROLS
3-123
Check for Water and Sediment in Water Separator, Drain Water
1. Open the cover on the right side of the machine.
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The water separator forms one unit with fuel pre-filter
(1).
2. It is possible to judge the water level and amount of sedi-
ment by looking through transparent cap (2). If there is any
water or sediment collected at the bottom, set a container
to catch the drain water under drain hose (3).
3. Loosen drain valve (4) and drain the water.
4. When fuel starts to drain from drain hose (3), tighten drain
valve (4) immediately.
On this machine, a sensor is installed to detect if water is accu-
mulated in transparent cap (2).
When the water separator monitor (5) lights up red on the
machine monitor, it indicates that water is accumulated in
transparent cap (2).
In this case also, use the procedure above to drain the water.
REMARK
When only the water separator monitor lights up, it lights up in
the position shown in the diagram on the right.
If other monitors also light up the same time, the water separa-
tor monitor lights up at a different position.
NOTICE
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If the water accumulated in transparent cap (2) freezes, the water separator monitor may not light up.
After the engine is started, as the temperature around fuel pre-filter (1) increases, the frozen water will
melt and the water separator monitor may suddenly light up. In cold areas, even if the water separator
monitor does not light up, drain the water frequently.
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If the water inside transparent cap (2) freezes, check that the frozen water has melted completely, then
use the procedure above to drain the water.
REMARK
If transparent cap (2) is dirty or it is difficult to see the inside, clean transparent cap (2) when replacing fuel pre-fil-
ter cartridge (1).
When the drain valve (4) has been removed during the cleaning operation, coat the O-ring with grease and tighten
until it contacts the bottom.