Komatsu PW160-7K Series Operation And Maintenance Manual page 164

OPERATIONS AND CHECKS BEFORE STARTING ENGINE
3. When preheating monitor flashes, turn the key in starting
switch (6) to the START position to start the engine.
Ambient temperature
Above 0° C
0°C to -10°C
-10°C to -20°C
4. When the engine starts, release the key in starting switch(6).
The key will return automatically to the ON position.
164
Preheating time
-
20 seconds
30 seconds
OPERATION
Heat Off
On
Start
Heat
Off
Heat Off
On
On
Start
Start