Komatsu WA500-6H, Operation & Maintenance Manual

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3.3 Operation Operation
3-108
WA500-6H – VEAM430100
3.3.2 Starting engine
WARNING
z Start the engine only after sitting down in the operator’s seat.
z Do not attempt to start the engine by short-circuiting the
engine starting circuit. Such an act may cause serious bodily
injury or fire.
z Check that there are no persons or obstacles in the sur-
rounding area, then sound the horn and start the engine.
z Exhaust gas is toxic. When starting the engine in confined
spaces, be particularly careful to ensure good ventilation.
NOTE
z
Do not start the engine with the accelerator pedal fully
depressed. There is danger that the engine parts may be
damaged.
z
Do not keep the starting motor rotating continuously for more
than 20 seconds.
If the engine does not start, wait for at least 2 minutes before
trying to start the engine again.
Avoid the sudden acceleration of the engine until it is
warmed up.
1. Turn the key of starting switch (1) to the ON position (B).
The automatic preheating will start and the preheating pilot
lamp (2) will light up.
Automatic pre-heating is actuated when the cooling water
temperature is less than -5°C (23°F).
The preheating time varies according to the engine water
temperature when the engine is started.
The table shown below gives a guide to preheating time.
2. Keep the accelerator pedal (3) free without depressing it.
GK050125
1
3
GK050049
A
B
C
GK050027
2
Engine water
temperature [°C (°F)]
Preheating time (sec)
above -5 (23) 0
-5 (23) 20
below -20 (-4) 40