Komatsu WA380-6 Operation & Maintenance Manual page 77

EXPLANATION OF COMPONENTS
INSPECTION AND MAINTENANCE ITEMS
If these lamps light up, stop operations quickly and carry out the following action.
(1) Radiator coolant level caution lamp
(2) Engine oil level caution lamp
(3) Battery electrolyte level caution lamp(if equipped)
(4) Maintenance caution lamp
(5) Air cleaner clogging caurion lamp
(Machines equipped with KOMTRAX)
RADIATOR COOLANT LEVEL CAUTION LAMP
This lamp (1) lights up to warn the operator that the coolant level in
the radiator has gone down.
During checks before starting (when the starting switch is turned to
the ON position but the engine is not started), this monitor lights up
if the coolant level in the radiator is low.
At the same time, the top line of the character display displays
"E01" and the bottom line displays "COOLANT LOW", so check
the water level in the radiator and add water.
During operation (engine running)
If the coolant level in the radiator becomes too low, the radiator
coolant level caution lamp will light up.
At the same time, the top line of the character display displays "E01" and the bottom line displays "COOLANT LOW",
so stop the engine, check the water level in the radiator, and add water.
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CAUTION
(6) Water separtor caution lamp
(7) Transmission oil filter clogging caution lamp
OPERATION