5.
Loosen the nut (1) and remove the bolt (2).
6.
Remove the cutting edge and end bit.
7.
Clean the mounting face.
8.
Invert the cutting edge and end bit, and install them, or re-
place with new ones.
If
the bolt (1) and nut (2) are damaged, replace them as
well.
1)
Install the edge to the blade, and tighten it lightly.
2)
Lower the blade on such as soil or rock 3 to 5 times to
eliminate the play at the bolt (2).
3)
Tighten the bolts to the specified torque.
4)
When installing the end bit (3), fit its top end (4) to the
stopper (5) and tighten the bolt.
Tightening torque: 2226 ± 275 Nm {227 ± 28 kgm} 
9.
After operating for several hours, retighten the mounting
nuts.
REMARK
When tightening, use the torque multiplier wrench to make
the work easier.
10.
If the nuts are rusty and they have to be gas-cut, both
ends (6) of the nuts have to be gas-cut.
T
ake care not to damage the seat surface (7). If it is dam-
aged, repair it.
Remove the spatter, etc. from the mounting surface.
METHOD FOR CLEANING AND CHECKING RADIATOR FIN, OIL COOLER FIN,
AND AFTERCOOLER FIN
Perform this procedure if there is any mud or dirt stuck to the radiator, oil cooler, of aftercooler.
REMARK
Check the rubber hoses. If they are cracked or fragile, replace them. Check the hose clamps for looseness as
well.
METHOD FOR CLEANING FIN BY ROTATING HYDRAULIC DRIVE FAN IN RE-
VERSE
WARNING
When performing the cleaning by rotating the hydraulic drive fan in reverse, check that the parking
brake lever is in LOCK position.
MAINTENANCE MAINTENANCE PROCEDURE
4-27
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