Komatsu PC138USLC Operation & Maintenance Manual page 190

OPERATION
Starting Engine in Cold Weather
Start the engine only after sitting down in the operator's seat.
Do not attempt to start the engine by short-circuiting the engine starting circuit. Such an act may cause a serious bodily injury
or fire.
Check that there are no persons or obstacles in the surrounding area, then sound the horn and start the engine.
Never use starting aid fluids as they may cause explosions.
Exhaust gas is toxic. When starting the engine in confined spaces, be particularly careful to ensure good ventilation.
NOTICE
Do not try to start the engine with the fuel adjustment dial set near the
full engine rotation. Otherwise the engine parts may be damaged.
Do not keep the starting motor rotating continuously for more than 20
seconds.
If the engine fails to start, wait for about 2 minutes and repeat from Step
4.
When starting in low temperatures, do as follows.
1. Check the lock lever (1) is in the LOCK position (L). If the lock
lever is in the FREE position (F), the engine does not start.
2. Before starting the engine, check that fuel control dial (2) is at the low position.
MACHINE OPERATIONS AND CONTROLS
WARNING
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