• Immediately after starting the engine, avoid sudden starts, sudden acceleration, unnecessary sudden
stops, and sudden changes in direction of the machine.
AUTOMATIC WARM-UP FUNCTION
NOTICE
During KDPF regeneration, the idle speed is set rather high regardless of the engine coolant tempera-
ture.
This machine is equipped with the automatic warm-up function.
While the AISS LOW switch is in OFF position or when the engine coolant temperature is low, the low idle
speed is automatically increased to cut down the warm-up time.
REMARK
Turning AISS LOW switch to ON position stop the automatic warm-up and decreases the idle speed.
If the engine coolant temperature is low and AISS LOW switch is returned to OFF position within a specific time
after engine is started, the automatic warm-up is resumed.
METHOD FOR WARM-UP OPERATION
NOTICE
• Do not increase the engine speed sharply during the warm-up operation.
It can shorten the service life of the engine parts.
• Do not continue the low idle or high idle operation for more than 20 minutes.
It does not only adversely affect the environment but also cause oil leakage from the turbocharger.
• When the warming up has not been operated enough, if the parking brake switch is set to “TRAV-
EL” and the dump lever is operated, the secondary steering may be actuated instantaneously.
1.
After the engine starts, run it for 5 minutes in the range between low idle and medium speed to warm it up.
2.
Check if the indicator of the engine coolant temperature
gauge is over position (A).
When it is over position (A), the warm-up operation is com-
pleted.
If the indicator does not move from position (A), perform
the warm-up operation further
3.
After finishing the warm-up operation, check that the ma-
chine monitor is normal.
If any of them is abnormal, ask your Komatsu distributor
for inspection and repair.
4.
Check that the steering operation is normal, the lamps light up and go out normally, the horn sounds, and
the exhaust gas color, sound, and vibration are normal.
If any of them is abnormal, ask your Komatsu distributor for inspection and repair.
METHOD FOR STOPPING ENGINE
Keep away from the exhaust pipe immediately after stopping the engine.
OPERATION MACHINE OPERATIONS AND CONTROLS
3-173
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