Komatsu PC138US-11 Operation & Maintenance Manual page 232

MACHINE OPERATIONS AND CONTROLS
1.
Check that engine coolant temperature caution lamp (1)
displays the correct temperature.
• Display (A) when temperature is correct: Caution lamp
background (C) is blue.
• Display (B) when temperature is low: Caution lamp
background (C) is white.
If it displays low temperature, perform additional warm up
of the engine until engine coolant temperature caution
lamp (1) displays the correct temperature.
For detail, see "METHOD FOR ENGINE WARM-UP OP-
ERATION (3-159)".
2.
Set swing lock switch (2) to ON position and check that the
swing lock pilot lamp is lit.
3.
Set the working mode to P mode (heavy-duty operation
mode).
Warm up the hydraulic component quickly.
For the working mode setting procedure, see "WORKING
MODE SELECTOR SWITCH (3-45)".
4.
Move lock lever (3) slowly and securely to FREE position
(F).
5.
Raise the bucket from the ground.
6.
Turn the fuel control dial (4) to a point of 2/3 between Low
idle (MIN) position and High idle (MAX) position.
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WENAM00111
OPERATION