Engine Start-Up - Komatsu 930E-4SE Operation & Maintenance Manual

OM3062 8/11

ENGINE START-UP

Never attempt to start the engine by shorting
across the starter terminals. This may cause fire,
or serious injury or death to anyone in the
machine's path. Start the engine from the
operator's seat only.
If the truck is equipped with an auxiliary cold
weather heater system, do not attempt to start
the engine while the heaters are in operation.
Damage to the coolant heaters will result!
1. Make sure that all personnel are clear of the
truck before starting the engine. Always sound
the horn as a warning before moving any
controls.
2. If the truck is in an enclosure, make sure that
there is adequate ventilation before start-up.
Exhaust fumes are dangerous!
3. Make sure that the directional control lever is in
PARK before starting.
4. Place the rest switch in the ON position to put
drive system in
information, refer to Section 32, Operator Cab
And Controls.
rest mode. For more
Operating Instructions - Section 30
Do not crank an electric starter for more than 30
seconds. Allow two minutes for cooling before
attempting to start the engine again. Severe
damage to the starter motors can result from
overheating.
5. The key switch is a four-position switch (ACC,
OFF, RUN, START). The ACC position is not
currently used.
a. Turn the key switch one position clockwise to
the RUN (not START) position. All electrical
circuits except the start circuit are activated.
b. Turn the key switch fully clockwise to the
START position and hold this position until
the engine starts. The START position is
spring-loaded and will return the switch to
the RUN position when the key is released.
NOTE: This truck is equipped with an engine prelube
system. With this feature, a noticeable time delay
may occur before engine cranking begins as the
engine lube oil passages are being filled and
pressurized.
6. After the engine has started, place the rest
switch in the OFF position to deactivate the rest
mode. Refer to Section 32, Operator Cab And
Controls for more information on the rest switch.
NOTE: In cold ambient conditions and when the
engine is cold, the engine rpm will not increase
above low idle speed until the engine controller
determines it is safe to do so. This time delay will
vary from 30 seconds to 11 minutes which allows the
coolant and engine oil to warm up.
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