Komatsu ecot3 WA430-6 Operation & Maintenance Manual page 85

EXPLANATION OF COMPONENTS
METER DISPLAY PORTION
(1) Torque converter oil temperature gauge
(2) Engine coolant temperature gauge
(3) Hydraulic oil temperature gauge
TORQUE CONVERTER OIL TEMPERATURE GAUGE
This meter (1) indicates the torque converter oil temperature.
It should be in white range (A) during operations.
If it enters red range (B) during operations, caution lamp (C) inside
the torque converter 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 "TC 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).
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(4) Fuel gauge
(5) Speedometer
(6) Meter display pilot lamp
OPERATION