Komatsu PC1250-11 Original Instructions Manual page 101

OPERATION
Low fuel level guidance
If the operable time estimated from the current fuel level and
the latest average fuel consumption is shorter than 8 hours, the
low fuel level message is displayed roughly.
The low fuel level message goes out after more than 10 sec-
onds or if the switch F5 is pressed.
Guidance for engine stop operation during the aftertreatment devices regenera-
tion
Immediately after starting the aftertreatment devices regeneration, the information about the engine stop opera-
tion during the aftertreatment devices regeneration is displayed as a rough guide.
When stopping the engine during regeneration of the aftertreat-
ment devices, stop the regeneration first, then stop the engine
after running it at low idle for approximately 5 minutes.
The information about engine stop operation during the after-
treatment devices regeneration goes out after more than 10
seconds or if the switch F5 is pressed.
METER DISPLAY
ENGINE COOLANT TEMPERATURE GAUGE
Engine coolant temperature gauge shows the engine coolant
temperature.
If the indicator is in green range during operation, it is normal. If
the indicator goes beyond (A) of red range during operations,
the overheat prevention system operates.
(A) to (B): Red range
(A) to (C): Green range
(C) to (D): White range
The overheat prevention system is actuated as follows.
Red range (A) position: Engine coolant temperature caution
lamp (E) shows abnormality display.
Red range (B) position: Engine speed changes to low idle, engine coolant temperature caution lamp (E) shows
abnormality display and alarm buzzer sounds at the same time
The overheat prevention system continues to operate until the indicator enters the green range.
When the engine is started, if the indicator is at position (D), the engine coolant temperature caution lamp (E)
shows the low-temperature display.
At this time, perform the warm-up operation.
EXPLANATION OF COMPONENTS
3-35