Komatsu D475A-5E0 Operation & Maintenance Manual page 67

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EXPLANATION OF COMPONENTS
ENGINE COOLANT TEMPERATURE GAUGE
Gauge (1) indicates temperature of the engine coolant.
If the temperature is normal during operation, green range (B)
lights up.
If red range (C) lights up during operation, set the fuel control dial
to lower the engine speed to approximately 3/4 of high idle (MAX),
and run it until the coolant temperature enters green range (B).
During operation, if red range (C) lights, engine coolant
temperature monitor flashes and the alarm buzzer sounds, stop
the machine and run at low idle until coolant temperature enters
green range (B).
NOTICE
If the coolant temperature gauge often enters red range (C), check the radiator for clogging.
POWER TRAIN OIL TEMPERATURE GAUGE
Gauge (2) indicates the torque converter outlet oil temperature.
If the temperature is normal during operation, green range (B) will
light.
If red range (C) lights up during operation, move the fuel control dial
to lower engine speed to approximately 3/4 of High idle (MAX),
reduce the load and run until the oil temperature enters green
range (B).
If red range (C) lights up, the power train oil temperature caution
lamp flashes and the alarm buzzer sounds during operations, stop
the machine, and run the engine at low idle until the oil temperature
goes down to green range (B).
NOTICE
If the power train oil temperature gauge often enters red range (C), shift down one speed range to reduce the load on the power
train when operating.
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OPERATION
(A)
White range
(B)
Green range
(C)
Red range
(A)
White range
(B)
Green range
(C)
Red range

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