Komatsu PC1250-11, Original Instructions Manual

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METHOD FOR CANCELLING AUTOMATIC WARM-UP OPERATION
When you are forced to urgently cancel the automatic warm-up
operation or to lower the engine speed to Low idle (MIN), do as
follows.
1.
Turn fuel control dial (2) to High idle (MAX) position and
hold it for 3 seconds or more.
2.
Turn fuel control dial (2) to Low idle (MIN) position.
The engine automatic warm-up is cancelled, and the en-
gine speed is lowered.
REMARK
Turbo protect function takes priority over the engine automatic warm-up.
When the turbo protect function activates, run the engine at low idle even the engine coolant temperature is
30 °C or less. Then the engine automatic warm-up starts automatically to increase the engine speed.
OPERATION MACHINE OPERATIONS AND CONTROLS
3-161