Komatsu HM400-5, Operation & Maintenance Manual

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ENGINE COOLANT TEMPERATURE CAUTION LAMP
Engine coolant temperature caution lamp warns about over-
heating of the engine coolant.
If the engine coolant temperature is abnormally high, the cau-
tion lamp lights up in red and action level “L02” is displayed.
At the same time, the centralized warning lamp lights up and
alarm buzzer sounds intermittently.
Place the machine in a safe place, set the gear shift lever to
NEUTRAL position (N), and run the engine at a medium speed
under no load until the caution lamp goes out.
TORQUE CONVERTER OIL TEMPERATURE CAUTION LAMP
The torque converter oil temperature caution lamp warns about
overheating of the torque converter oil.
If the torque converter oil temperature is abnormally high, the
caution lamp lights up in red and action level “L02” is displayed.
At the same time, the centralized warning lamp lights up and
alarm buzzer sounds intermittently.
Place the machine in a safe place, set the gear shift lever to
NEUTRAL position (N), and run the engine at a medium speed
under no load until the caution lamp goes out.
EXPLANATION OF COMPONENTS OPERATION
3-20