Komatsu WA500-6H Operation & Maintenance Manual page 166

3.3 Operation
1. Stop the machine on horizontal ground and turn the parking
brake switch ON.
2. Stop the engine.
3. Turn the starting switch to the ON position.
4. Set cooling fan reverse rotation switch (1) to position (a)
(ON).
5. Check that the pilot lamp inside the switch cooling fan and
the reverse rotation pilot lamp on the main monitor are
lighted up.
At the same time, "COOLING FAN REVERSE" is displayed
on the character display and the fan is set to reverse rota-
tion.
6. Turn the key in the starting switch to the START position and
start the engine.
The cooling fan will rotate in reverse.
REMARK
The normal flow of air from the cooling fan is from the engine to
the rear of the machine. During cleaning operations, if the fan is
rotated in reverse, the flow of air is from the rear of the machine
to the engine, and this blows out the dirt from the radiator fins.
7. Run the engine at high idle.
Select the time for running the engine at high idle as follows
according to the condition of clogging.
Normal clogging: 1 to 2 minutes
Excessive clogging: 2 to 3 minutes
REMARK
If there are many pieces of wood or chips stuck to the radiator
fins, open the cleaning cover (2) and run the engine at high
idling. The pieces of wood and chips will be blown out through
the opening of the cleaning cover. The pieces of wood and chips
will be blown out into the surrounding area, so to ensure safety,
check that there is no one in the surrounding area before carry-
ing out the operation.
8. After completing the cleaning, run the engine at low idle for
approx. 10 seconds.
9. Turn the starting switch to the OFF position and stop the
engine.
3-100
Operation
a
b
GK050069
GK043111
WA500-6H – VEAM430100