Komatsu HM400-5, Operation & Maintenance Manual

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If you start the machine travel or operate the dump body
while the fan rotates in reverse, wrong operation in fan re-
verse mode caution lamp (4) lights up.
At the same time, the centralized warning lamp lights up
and alarm buzzer sounds intermittently.
5.
After finishing cleaning, stop the engine.
A certain time after the starting switch key is turned to OFF
position, the fan is returned to the normal rotation mode
automatically.
Check that fan automatic reverse display (3) is OFF when
the starting switch is turned ON.
Use the following procedure when restoring the normal rotation manually.
1.
Turn the starting switch to ON position again, select “Radi-
ator Fan Reverse Mode” in the “Machine Setting and Infor-
mation” menu, and press enter switch (1).
2.
When the screen shown in the figure appears, press enter
switch (1) to return the radiator fan to the normal rotation
mode.
REMARK
When the aftercooler fan is set in the reverse mode, the radia-
tor fan is returned to the normal rotation mode automatically.
If the engine compartment is heated high due to the reverse
mode-based reverse rotation of the fan, the controller may stop
the air conditioner to protect itself from being damaged.
AFTER COOLER FAN REVERSE MODE
k k
CAUTION
When rotating the fan in the reverse direction, beware extremely that dirt will not fly out and cloth, etc.
will not be wound in the fan.
Since dust may blown up, check that there is no person around while the fan is rotating in reverse.
When cleaning the dirt or dusts stuck to the aftercooler, you can rotate the fan in the reverse direction.
1.
Seat the dump body and stop the engine.
OPERATION EXPLANATION OF COMPONENTS
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