Komatsu PC290LC-6K Operation & Maintenance Manual page 54

11. EXPLANATION OF COMPONENTS
METERS
3. ENGINE WATER TEMPERATURE GAUGE
This gauge indicates the engine cooling water temperature.
If the temperature is normal during operation, the green range will
light up.
If the red range lights up during operation, the overheat prevention
system will be actuated.
The overheat prevention system acts as follows.
Red range lights up:
Output horsepower drops, and water temperature monitor
When red range lights up:
Engine speed is lowered further to low idling, engine water temperature
monitor lights up, and alarm buzzer sounds at the same time.
The overheat prevention system is actuated until the temperature enters
the green range.
When red range
and the fuel control dial is turned to the low idling position, the display will
be cancelled.
4. FUEL GAUGE
This gauge indicates the amount of fuel in the fuel tank. If the fuel
level is normal during operation, the green range will light up.
If only the red range lights up during operation, there is less than 25
litres (6.6 US gal, 5.5 UK gal) of fuel remaining in the tank, so check and
add fuel.
After the starting switch is turned ON, the correct level may not be
displayed for a moment, but this does not indicate any abnormality.
When stopping the engine, turn the starting switch ON and check
that the monitor lamps on items A, B, C and D and the meters light up.
5. DISPLAY
This normally displays the clock time. If any error occurs, it indicates
error information while the starting switch is ON.
2-10
lights, if the engine water temperature is reduced
flashes.