Komatsu WA320-5H Operation & Maintenance Manual page 74

OPERATION
If the brake oil pressure caution lamp lights up, the footbrake may not work, so keep the parking brake applied to
prevent the machine from moving.
Keep the parking brake applied to prevent the machine from moving until the brake pressure becomes normal and
the brake oil pressure caution lamp goes out.
ENGINE OIL PRESSURE CAUTION LAMP
This lamp (2) lights up to warn the operator that the engine
lubricating oil pressure has dropped.
During checks before starting (starting switch at the ON posi-
tion, engine stopped) the lamps are lighted up, and when the
engine is started, the lamps go out.
During operation (engine running)
If the engine lubricating oil pressure goes down during operation, the engine lubricating oil pressure caution lamp
and central warning lamp light up and the alarm buzzer sounds intermittently.
At the same time, "E03 CALL" and "CHECK RIGHT NOW" are displayed on the character display in turn, so stop
the machine immediately in a safe place, then stop the engine and carry out inspection.
BATTERY CHARGE CIRCUIT CAUTION LAMP
This lamp (3) lights up when the engine is running to warn the
operator that an abnormality has occurrred in the charging cir-
cuit.
During checks before starting (starting switch at the ON posi-
tion, engine stopped) the lamps are lighted up, and when the
engine is started, the lamps go out.
During operation (engine running)
If an abnormality occurrs in the charging circuit during opera-
tion, the battery charge circuit caution lamp and central warn-
ing lamp light up and the alarm buzzer sounds intermittently.
At the same time, "E03 CALL" and "CHECK RIGHT NOW" are displayed on the character display in turn, so stop
the machine immediately in a safe place, then stop the engine and carry out inspection.
STEERING OIL PRESSURE CAUTION LAMP
(Red)
This lamp (4) lights up to warn the operator that the steering oil
pressure has dropped.
During checks before starting (starting switch at the ON posi-
tion, engine stopped) the lamps are lighted up, and when the
engine is started, the lamps go out.
During operation (engine running)
EXPLANATION OF COMPONENTS
3-15