METHOD FOR CLEANING RADIATOR FIN AND COOLER FIN
WARNING
• When
the engine is running, do not open the engine side cover. When cleaning the fin, stop the en-
gine rotation completely
.
•
If
compressed
air, high-pressure water, or steam hits your body directly or dirt is scattered by the
compressed air, high-pressure water, or steam, there is a danger of personal injury. Always wear
protective equipment such as protective eyeglasses and dust mask.
Perform this procedure if there is any mud or dirt stuck to the radiator.
METHOD FOR CLEANING FINS BY ROTATING COOLING FAN IN REVERSE
NOTICE
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 be blown up, check that there is no people around while the fan is rotating in reverse.
On the job site where the dirt sticks easily to radiator or cooler, set the automatic cooling fan to rotate the fan in
reverse. This will blow off any dirt stuck to radiator or cooler, and can extend the cleaning interval.
METHOD FOR REVERSING MANUAL OPERATION FAN
NOTICE
• Never rotate the fan in reverse by hand when performing the operation.
• Before operating the manual reverse rotation of the fan, set the engine speed to low idle.
For the manual reverse rotation of the fan, see “RADIATOR FAN MANUAL REVERSE MODE (3-59)”.
• After reverse rotation of the fan is started, set the engine speed to high idle.
• Set the high idle operation time as follows, depending on the clogging level.
Ordinary clogging: 1 to 2 minutes
Excessive clogging: 2 to 3 minutes
When the cleaning is completed, set the engine speed to low idle and restore the rotation of the fan to normal.
METHOD FOR REVERSING AUTOMATIC OPERATION FAN
For the automatic reverse rotation of the fan, see “RADIATOR FAN AUTOMATIC REVERSE MODE (3-61)”.
REMARK
• When the fan rotation direction is switched, the fan reverse rotation pilot lamp flashes.
After a heavy load operation, the fan rotation direction may not change to protect the machine.
Set the engine speed to low idle and wait until the oil and coolant temperature goes down before operating
the switch.
• In a cold circumstance, perform the cleaning by Fan Reverse Mode within less than 5 minutes.
If the fan reverse rotation is performed for a long time, DEF hose may freeze.
METHOD FOR CLEANING FIN WITH COMPRESSED AIR
WARNING
When opening fan guard, stop the engine, and display warning tag on multifunction mono-lever.
MAINTENANCE MAINTENANCE PROCEDURE
4-31
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