Komatsu WA480-8, Руководство по эксплуатации и техническому обслуживанию

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1.
Turn the key in starting switch (1) to ON position (B).
When the ambient temperature is low, preheating pilot
lamp (2) lights up and automatic preheating is performed.
Keep the starting switch key (1) at ON position until pre-
heating pilot lamp (2) goes out.
Operate the starting switch according to the following pro-
cedure.
Ambient temperature
( °C)
Lighting time (sec.)
Above -5 0
-5 to -20 20 to 40
Below -20 40
REMARK
Usually, the engine is preheated sufficiently by the automatic preheating. If it is needed to extend the pre-
heating time, turn the key in starting switch (1) to position (D).
Do not preheat the engine more than 40 seconds, however.
2.
After preheating pilot lamp (2) goes out, turn starting
switch key (1) to START position (C).
Keep the key in starting switch (1) at position (C) to keep
running the starting motor until the engine starts.
The starting motor keeps running to start the engine.
REMARK
• Do not operate the starting motor continuously for
more than 20 seconds.
• If the engine does not start, release your hand from
the starting switch, wait for 1 minute, and then start
the engine again.
3.
After the engine starts and its speed increases, release
your hand from the key of starting switch (1).
The key returns automatically to ON position (B).
REMARK
When the engine is started, white smoke may come out of
the exhaust pipe. It is fine water particles which are pro-
duced from moisture or water vapor and which seem
white, thus it does not indicate a problem.
The smell of the exhaust gas is different from that of the
conventional diesel machine because of the exhaust gas
filtering function.
REMARK
Urea SCR system has the function of heating and keeping itself warm to prevent freezing of DEF.
If DEF is frozen, the DEF system is heated to thaw the DEF automatically after the engine starts. 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 the DEF may freeze while the machine is in op-
eration, the DEF system is warmed automatically to prevent freezing. When the ambient temperature de-
creases 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.
MACHINE OPERATIONS AND CONTROLS OPERATION
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