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OPERATION
IN COLD AREAS
(AUTOMATIC WARMING-UP OPERATION)
This machine is equipped with an automatic warming-up device.
When the engine is started, if the engine coolant temperature is low (below 30 °C (86 °F)), the warming-up
operation is carried out automatically.
The automatic warming-up operation is canceled if the engine coolant temperature reaches the specified
temperature (30 °C (86 °F)) or if the warming-up operation is continued for 10 minutes. If the engine coolant
temperature or hydraulic oil temperature are low after the automatic warming-up operation, warm the engine up
further as follows.
1. Turn fuel control dial (1) to the center position between LOW
IDLE (MIN) and HIGH IDLE (MAX) and run the engine at
medium speed for about 10 minutes with no load.
2. Operate blade control lever (4) to the RAISE position, then
keep the blade raised to the maximum height and continue to
relieve the circuit for 10 minutes.
3. Finally, operate blade control lever (4) and ripper control lever
to operate the blade and ripper cylinders several times.
If the oil temperature in the work equipment is not properly
raised, there will be a time lag in the response of the work
equipment and steering.
4. After warm-up is completed, check gauges and caution lamps
for proper operation. If any problem is found, repair it.
Continue to run the engine under a light load until engine
coolant temperature gauge indicator (2) is within the green
range (A) - (C).
(A) - (B): Red range
(A) - (C): Green range
(C) - (D): White range
REMARK
If the power train oil temperature is not raised sufficiently, it will take
longer to accelerate to the maximum speed.
5. Check for abnormal exhaust gas color, noise, or vibration. If any problem is found, contact your Komatsu
distributor.
OPERATION
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