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OPERATION
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 immediately. Check
the oil level, oil leakage, etc. and take proper meas-
ures.
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 system and keeping it warm to prevent freezing of DEF.
If DEF is frozen, the DEF system is automatically heated to thaw DEF after the engine is started. The devi-
ces do not operate until DEF is thawed and supplied, but this does not indicate any abnormality.
When the ambient temperature decreases to a level where DEF may freeze while the machine is in opera-
tion, the DEF system is warmed automatically to prevent freezing. When the ambient temperature decrea-
ses to a level where freezing of DEF is not preventable, the devices stop automatically, but this does not
indicate any abnormality.
If DEF freezes, thawing operation is performed automatically. Never heat DEF. Harmful ammonia gas may
be generated.
METHOD FOR MANUAL PREHEATING WHEN STARTING ENGINE
Regardless of the ambient temperature, it is possible to start the engine preheating manually.
1.
Turn the key in starting switch (3) counterclockwise from OFF position (A). The preheating pilot lamp lights
up and preheating of the engine starts. (Preheating continues while the key in starting switch (3) is held
counterclockwise.)
The preheating pilot lamp starts flashing approximately 30
seconds after preheating starts and then goes out in ap-
proximately 10 seconds.
MACHINE OPERATIONS AND CONTROLS
3-179
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