Komatsu PC1250-11, Original Instructions Manual

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2.
Turn the fuel control dial (2) to Low idle (MIN) position.
3.
Turn starting switch key (3) to ON position (B).
REMARK
If the ambient temperature is low, the preheating pilot lamp
lights up and automatic preheating is performed. Keep the
starting switch key (3) at ON position (B) until the preheat-
ing pilot lamp goes out.
The lighting time that the preheating pilot lamp stays lit de-
pends on the ambient temperature as shown in the table.
Ambient temperature Lighting time
Min. -4 °C 0 seconds
-4 °C to -25 °C
0 seconds to 45 sec-
onds
Max. -25 °C 45 seconds
If a password has been set, the input display screen will be
indicated on the monitor screen, but the preheating pilot
lamp also operates as in the standard screen.
4.
If the preheating pilot lamp does not light up, or it lights up and then goes out to inform that the engine pre-
heating has been completed, turn the starting switch key (3) to START position (C). The engine will start.
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 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 automatically return 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.
MACHINE OPERATIONS AND CONTROLS OPERATION
3-156