Komatsu PC290LC-11 Operation & Maintenance Manual page 248

MACHINE OPERATIONS AND CONTROLS
1.
Check that engine coolant temperature caution lamp (1)
displays the proper temperature.
• Display (A) when temperature is proper: 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 proper temperature. For detail, see
"METHOD FOR
(3-173)".
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).
The hydraulic component is warmed up quickly.
For the details of the working mode setting procedure, see
"WORKING MODE SELECTOR SWITCH (3-45)".
4.
Move lock lever (3) slowly to FREE position (F), then raise
the bucket from the ground.
5.
Turn fuel control dial (4) to a 2/3 position between Low idle
(MIN) position and High idle (MAX) position.
3-176
ENGINE WARM-UP OPERATION
OPERATION