Komatsu PC800-8 Operation & Maintenance Manual page 160

Hydraulic excavator
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MACHINE OPERATIONS AND CONTROLS
2. Check that engine water temperature monitor (1) displays
green.
If it displays white, use the procedure in Step 3 to carry out
additional warm up of the engine until the monitor displays
green.
3. Turn fuel control dial (2) to a point midway between low
idling (MIN) and full speed (MAX), run the engine at a mid-
range speed, and run under no load until engine water
temperature monitor (1) displays green.
If the engine water temperature monitor displays green, the engine warm-up operation is completed.
After checking that the engine water temperature monitor displays green, carry out the warming-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.
3-96
OPERATION

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