Komatsu D155A-6 Operation & Maintenance Manual page 68

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OPERATION
GAUGES AND METER
ENGINE COOLANT TEMPERATURE GAUGE
This meter (4) shows the engine coolant temperature.
During normal operations, the indicator should be in the green
range. If the indicator enters the red range during operations, the
overheat prevention system is actuated.
(A) - (B): Red range
(A) - (C): Green range
(C) - (D): White range
The overheat prevention system is actuated as follows.
Red range (A) position: Engine coolant temperature monitor (1)
Red range (B) position: Engine speed changes to low idling,
The overheat prevention system continues to work until the
indicator enters the green range.
When the engine is started, if the indicator is in the (C) - (D) range,
engine
coolant
temperature
low-temperature display.
If this happens, carry out the warming-up operation. For details,
see "OPERATIONS AND CHECKS AFTER STARTING ENGINE
(PAGE 3-121)".
FUEL GAUGE
This monitor (5) shows the amount of fuel remaining in the fuel
tank.
The indicator should be in the green range during operations.
If the indicator enters the red range (A) during operation, carry out
inspection and add fuel.
(A) - (B): Indicates red range
(A) - (C): Indicates green range
The correct fuel level may not be displayed for a short time when
the starting switch is turned ON, but this is not an abnormality.
shows abnormality display
engine coolant temperature monitor (1)
shows abnormality display, alarm buzzer
sounds at same time
monitor
(1)
shows
the
EXPLANATION OF COMPONENTS
3 - 17

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