Komatsu WA380-6 Operation & Maintenance Manual page 86

OPERATION
EXPLANATION OF COMPONENTS
ENGINE COOLANT TEMPERATURE GAUGE
This meter (2) indicates the engine coolant temperature.
During normal operations, the indicator should be in the white
range (A).
If the indicator enters red range (B) during operations, caution lamp
(C) inside the engine coolant temperature gauge lights up. At the
same time, the central warning lamp lights up and the alarm buzzer
sounds.
In addition, the top line of the character display displays "E02" and
the bottom line displays "ENGINE OVERHEAT".
Run the engine at a midrange speed under no load and wait for the
indicator to return to the white range (A).
HYDRAULIC OIL TEMPERATURE GAUGE
This meter (3) indicates the hydraulic oil temperature.
It should be in white range (A) during operations.
If it enters red range (B) during operations, caution lamp (C) inside
the hydraulic oil temperature gauge will light up. At the same time,
the central warning lamp lights up and the alarm buzzer sounds
intermittently. In addition, "E02" is displayed on the top line of the
character display and "HYD OVERHEAT" is displayed on the
bottom line.
Run the engine under no load at a mid-range speed and wait until
the indicator goes down to white range (A).
FUEL GAUGE
This meter (4) indicates the amount of fuel remaining in the fuel
tank.
F: Full tank
E: Fuel level is low
When the remaining amount of fuel goes below 27 liters (7.13 US
gal), caution lamp (A) inside the fuel gauge lights up.
If it lights up, check and add fuel.
SPEEDOMETER
This meter (5) indicates the travel speed of the machine.
The display unit is indicated on meter display pilot lamp (6).
It is also possible to display the engine speed by switching meter
(5).
If you wish to switch between the speedometer and tachometer,
please contact your Komatsu distributor to have it switched.
3 - 29