Komatsu WA500-6H, Руководство по эксплуатации и техническому обслуживанию

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Operation 3.3 Operation
WA500-6H – VEAM430100
3-109
3. After the preheating pilot lamp (2) goes out, turn the key of
starting switch (1) to the START position (C) to start the
engine.
4. After the engine starts, release the key in starting switch (1).
The key will automatically return to the ON position (B).
5. Immediately after starting the engine, run the engine at idling
without depressing accelerator pedal (3) for at least 10 sec-
onds in warm weather and for at least 15 seconds in cold
weather.
REMARK
Immediately after the engine is started, the turbo protect function
is actuated. Even if the accelerator pedal is depressed, the
engine speed will not rise above 1,000 rpm.
z If the accelerator pedal is kept depressed, the engine speed
will suddenly rise after the turbo protect time. To prevent this,
release the accelerator pedal.
z The turbocharger rotates at extremely high speed. Immedi-
ately after the engine is started, the pressure of the lubricat-
ing oil has not risen sufficiently, so if the engine speed is
suddenly raised, it may lead to damage or seizure of the
turbocharger bearing. The turbo protect function acts to pre-
vent this problem. It uses electronic control to prevent the
engine speed from rising above a certain speed for the first
few seconds after the engine started.
Automatic warming-up operation
A function of engine warming-up run (engine rpm: 1000 rpm) is
automatically actuated after the engine is started up, when the
engine water temperature is low (below 30°C (86°F)). It is gradu-
ally released either when the engine water temperature rises
over 30°C (86°F), or when 10 minutes have passed since the
engine start-up.
GK050049
A
B
C
GK050127
Engine water
temperature
[°C (°F)]
Turbo protect
time
(sec)
above 0 (32) 0
-5 (23) 3
below -10 (14) 5