Komatsu ecot3 GALEO HM300-2 Operation And Maintenance Manual page 137

OPERATION OPERATION
2. After the preheater pilot lamp goes off, turn the key of the
starting switch to the START position, and the engine will start.
REMARK
When starting the engine, the monitor may flash while the starting
motor is turning, but if the monitor lamp goes out after the engine
is started, there is no problem.
3. After the engine starts, release the key of the starting switch.
REMARK
If the engine fails to start, return the key of the starting switch to the
OFF position, and then start the operation again from step 1. If the
starting switch is not returned to the OFF position, the automatic
preheater does not operate.
4. Just after the engine starts, do not depress the accelerator pedal but run the engine idle at low speed for at least
15 seconds.
When the engine is started for the first time after the engine oil or engine oil filter is replaced, continue the low
idle run for at least 20 seconds to circulate the engine oil in the engine.
REMARK
Since the turbocharger rotates at very high speed, it is seized if not lubricated well. To prevent this, the turbo
protect mechanism works for a certain time just after the engine starts, depending on the engine water
temperature.
Engine water temperature
above 10 ° C (50 ° F)
-10 ° C to 10 ° C (14 ° F to 50 ° F)
below -10 ° C (14 ° F)
Just after the engine starts, the injection characteristics are changed for a certain time to keep the low idle speed
a little high, depending on the engine water temperature. The engine acceleration characteristics are also
changed so that the engine will be accelerated moderately.
Engine water temperature
above 20 ° C (68 ° F)
0 ° C to 20 ° C (32 ° F to 68 ° F)
-20 ° C to 0 ° C (-4 ° F to 32 ° F)
-30 ° C to -20 ° C (-22 ° F to -4 ° F)
3 - 86
Turbo protect time
0 sec
0 to 5 sec
5 sec
Injection characteristics
change time
0 sec
0 to 6 sec
6 to 12 sec
12 to 15 sec
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OPERATION OPERATION