Komatsu H75051 Operation & Maintenance Manual page 241

OPERATION
1.
Turn the key in starting switch (1) to ON position (B).
When the ambient temperature is low, preheating pilot
lamp (2) lights up and automatic preheating is performed.
Keep the starting switch key (1) at ON position until pre-
heating pilot lamp (2) goes out.
The time that preheating pilot lamp (2) stays lit depends on
the ambient temperature as shown in the table.
Ambient temperature ( °C)
-1 to -15
Below -15
REMARK
Usually, the engine is preheated sufficiently by the automatic preheating. If it is needed to extend the pre-
heating time, turn the key in starting switch (1) to position (D) and hold it in the position.
Do not preheat the engine more than 30 seconds, however.
2.
When preheating pilot lamp (2) does not light up, turn the
key in starting switch (1) to START position (C) after the
engine preheating has been completed.
The starting motor keeps running to start the engine.
Keep the key in starting switch (1) at position (C) to keep
running the starting motor until the engine starts.
REMARK
When the ambient temperature is low, fuel is not supplied
to the engine for 3 seconds to ensure lubrication of the en-
gine and to improve the durability after the key in starting
switch (1) is turned to START position (C), so the engine
does not start during this time.
3.
When the engine starts, release the starting switch key (1).
The key returns automatically to ON position (B).
When the engine is started, white smoke may come out of the exhaust pipe. It is fine water particles which are
produced from moisture or water vapor and which seem white, thus it does not indicate an abnormality.
The smell of the exhaust gas is different from that of the conventional diesel machine because of the exhaust
gas filtering function.
Lighting time (sec.)
0 to 30
30
MACHINE OPERATIONS AND CONTROLS
3-175