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OPERATION
REMARK
If the ambient temperature is low, the engine may not start
even when the key in starting switch (3) is kept at START
position (C) for 20 seconds.
If this happens, wait for at least 2 minutes, then start again
from the beginning.
To preheat the engine forcibly when the automatic preheat-
ing does not start, see "METHOD FOR MANUAL PRE-
HEATING WHEN STARTING ENGINE".
5.
When the engine starts, release the starting switch key (3). The key will return automatically to ON position
(B).
REMARK
When the engine is started, the battery voltage may sud-
denly drop depending on the temperature and the battery
condition. If this happens, the display on the machine mon-
itor may momentarily go out, but this does not indicate any
abnormality.
6.
After the engine starts, wait for the engine oil pressure caution lamp to go out. Do not touch the control
levers or control pedal while the engine oil pressure caution lamp is lit.
NOTICE
If the engine oil pressure caution lamp does not go out in 4 to 5 seconds, stop the engine immedi-
ately. Check the oil level, oil leakage, etc. and take proper measures.
REMARK
White smoke may be discharged for a short time immedi-
ately after the engine is started or during the aftertreatment
devices regeneration in the cold season, but this is not a
failure.
REMARK
Urea SCR system has the function of heating and keeping
itself warm to prevent freezing of DEF.
If DEF is frozen, DEF system is heated and thawed auto-
matically after the engine starts. The devices do not oper-
ate until DEF is thawed and supplied, but this does not in-
dicate any abnormality.
When the ambient temperature decreases so much that
DEF may freeze while the machine is in operation, DEF
system is warmed automatically to prevent freezing. When
the ambient temperature decreases so much that freezing
of DEF is not preventable, the devices stop automatically,
but this does not indicate any abnormality.
If DEF freezes, thawing operation is performed automati-
cally. Never heat DEF. Harmful ammonia gas may be gen-
erated.
METHOD FOR MANUAL PREHEATING WHEN STARTING ENGINE
Regardless of the ambient temperature, it is possible to start the engine preheating manually.
MACHINE OPERATIONS AND CONTROLS
3-173
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