Komatsu PC138USLC Operation & Maintenance Manual page 195

MACHINE OPERATIONS AND CONTROLS MACHINE OPERATIONS AND CONTROLS
(A) Display when temperature is correct: Monitor background (C)
(B) Display when temperature is low: Monitor background (C) is
If the engine coolant temperature monitor displays the correct temperature, the engine warm-up operation is
completed.
After checking that the engine coolant temperature monitor displays the correct temperature, carry out the warm-up
operation for the hydraulic equipment.
NOTICE
Canceling automatic warm-up operation
If it becomes necessary in an emergency to cancel the automatic warm-up operation or to lower the engine speed to low idle, do
as follows.
1) Turn fuel control dial (2) to the full speed (MAX) position
and hold it for 3 seconds.
2) When fuel control dial (2) is returned to the low idle (MIN)
position, the engine speed will drop.
3 - 140
is blue
white
OPERATION OPERATION