Komatsu WA600-8 Operation & Maintenance Manual page 395

MAINTENANCE
6.
Select "Fan Reverse Mode" on "Machine Setting and Infor-
mation" menu screen, then press ENTER switch (1).
7.
Press ENTER switch (1) to rotate the fan in the reverse di-
rection.
If the fan reverse operation is performed without satisfying
the condition for reversing the fan, the screen shown in the
figure is displayed, and the fan rotation direction cannot be
switched.
In this case, press RETURN switch (2), and then repeat
the procedure from the first.
REMARK
The fan rotation switches from the normal direction to the
reverse direction only when all of the following conditions
are met.
• The engine is stopped.
• The cooling fan is stopped.
8.
Start the engine.
The fan rotates in reverse.
9.
Set the engine speed to high idle and perform the cleaning.
Select the time for running engine at high idle as follows according to the condition of clogging.
• Ordinary clogging: 1 to 2 minutes
• Excessive clogging: 2 to 3 minutes
MAINTENANCE PROCEDURE
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