Komatsu PC118MR-8 Operation And Maintenance Manual page 222

USE OF THE MACHINE AND RELATED CONTROLS
(A) Correct temperature: blue bottom of warning light (C)
(B) Low temperature: white bottom of warning light (C)
If the coolant temperature warning light displays the correct
temperature, the engine warming operation is finished.
After checking the status of the temperature warning light of the
engine coolant, check the hydraulic system warming operation.
NOTICE
Cancel the automatic warming operation
If necessary, in case of an emergency, cancel the automatic warming operation or reduce engine speed to
the low idle and proceed as follows.
1) Turn the hand accelerator (2) to the maximum (MAX)
speed and hold it there for 3 seconds.
2) Turn the hand accelerator (2) to the low idle (MIN) and
the engine speed decreases.
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