Komatsu WA600-8 Operation & Maintenance Manual page 268

MACHINE OPERATIONS AND CONTROLS
NOTICE
• Do not accelerate the engine abruptly until it is
warmed up.
• Do not turn the starting motor continuously for 20 sec-
onds or longer.
• If the engine does not start, wait for 2 minutes or so,
and then try to start the engine again.
Immediately after you fail to start the engine and the
starting switch returns to ON position, the starting mo-
tor does not rotate within 3 seconds even if you turn
the starting switch to START position.
• When starting the engine, do not depress the accelera-
tor pedal.
Even if the accelerator pedal is depressed just after
the engine is started, the engine speed is limited by
the turbo protect function. After the turbo protect time,
however, the engine speed rises sharply and the tur-
bocharger may be damaged.
When the engine is started after it has been left at temperature of approximately -20 °C for more than a half day,
it takes time to attain perfect combustion.
Operate the starting switch according to the following procedure.
1.
Turn starting switch (1) to ON position (B).
This machine is equipped with an engine automatic pre-
heating device that functions to start the engine preheating
automatically.
If the engine coolant temperature is low, the preheating pi-
lot lamp on machine monitor (2) lights up and the automat-
ic preheating starts.
2.
Keep the starting switch (1) at ON position (B) until pre-
heating is completed and the preheating pilot lamp goes
out.
The following shows the rough preheating time.
Engine coolant tem-
perature
Min. 0 °C
0 to -25 °C
Max. -25 °C
REMARK
Usually, the engine is preheated sufficiently by the automatic preheating. If it is needed to extend the pre-
heating time, turn the starting switch to preheating position (D).
Do not preheat the engine for more than 30 seconds, however.
3-200
Preheating time
0 seconds
Variable between 0
and 45 seconds
45 seconds
OPERATION