Komatsu PC308USLC-3E0 Operation & Maintenance Manual page 68

OPERATION
DETAILED CONTROLS AND GAUGES
Hydraulic Oil Temperature Monitor
If this monitor (2) lights up white in low temperatures, carry out the
warming-up operation. For details, see "Hydraulic Equipment
Warm Up (PAGE 3-93)".
Continue the warming-up operation until monitor (2) changes to
green.
Fuel Level Monitor
This monitor (3) lights up to warn that the operator that the level in
the fuel tank is low.
If the remaining amount of fuel goes down to 60 liters (10.57 US
gal), the light changes from green to red, so add fuel as soon as
possible.
Charge Level Monitor
This monitor (4) warns the operator that there is an abnormality in
the charging system when the engine is running.
If the battery is not being charged properly while the engine is
running, monitor lights up red.
If monitor lights up red, check the V-belt for looseness. If any
abnormality is found, perform the necessary actions. For details,
see "OTHER TROUBLE (PAGE 3-153)".
REMARK
When the engine is started or stopped, the lamp may light
momentarily, but this does not indicate any abnormality.
Air Cleaner Clogging Monitor
This monitor (5) warns the operator that the air cleaner is clogged.
If it lights up red, stop the engine and inspect and clean the air
cleaner.
For details of checking and cleaning the air cleaner, see "CHECK,
CLEAN AND REPLACE AIR CLEANER ELEMENT (PAGE 4-19)".
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