Komatsu H75051, Operation & Maintenance Manual

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1.
Select “Automatic Fan Reverse Mode” from “Machine Set-
ting and Information” menu, and press ENTER switch (1).
2.
Select the duration and cycle of the automatic fan reverse,
and press ENTER switch (1).
The following 4 items can be selected.
“OFF”
The fan does not rotate in reverse direction automatically.
“Mode A”
The fan rotates in the reverse direction for 1 minute once
for every 2 hours.
“Mode B”
The fan rotates in the reverse direction for 1 minute once for every 1 hours.
“Mode C”
The fan rotates in the reverse direction for 4 minute once for every 0.5 hours.
The default is “Mode A”.
When you want other than above settings for the duration and cycle of the automatic fan reverse rotation,
consult your Komatsu distributor.
REMARK
The fan rotation switches from the normal direction to the reverse direction only when all of the following
conditions are met.
• Other than “OFF” is set in “Automatic Fan Reverse Mode”.
• The set changeover time for “Automatic Fan Reverse Mode” has elapsed.
• The engine coolant temperature is less than 102 °C.
• The boost temperature is less than 119 °C.
• The HST oil temperature is less than 100 °C.
• It has been 20 seconds or more since the engine was started.
EXPLANATION OF COMPONENTS OPERATION
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