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MAINTENANCE
METHOD FOR INVERTING AND REPLACING CUTTING EDGE AND END BIT
It is dangerous if the work equipment moves by mistake when the cutting edge and end bit are turned
180 deg. or replaced.
Set the work equipment in a stable condition, place the work equipment lock lever to LOCK position,
then stop the engine.
Turn the cutting edges and end bits 180 degrees or replace them before they are worn out to the blade end.
1.
Raise the blade to proper height, and place blocks under it to prevent it from lowering.
2.
Set the work equipment lock lever to LOCK position.
3.
Stop the engine.
4.
Judge the wear of the end bit and cutting edge by the following wear standards.
Wear standards
Item
No.
Measuring point
1
Height of end bit
2
Height of cutting edge
REMARK
•
If both sides of the cutting edge are worn out, replace
with new ones.
•
If the wear extends to the mounting surface, repair the
mounting surface before installing.
5.
Loosen the nut (3) and remove the bolt (4).
6.
Remove the cutting edge and end bit.
7.
Clean the mounting face.
8.
Turn the cutting edge and end bit 180 deg. or replace them
with new ones.
9.
Install the cutting edge and end bit, and tighten them light-
ly.
If nut (3) and bolt (4) are damaged, replace them as well.
10. Press the blade against the ground to eliminate of the play
of bolt (4).
11. Tighten the bolt to the specified torque.
Tightening torque: 255±34 Nm {26±3.5 kgm}
12. After operating the machine for several hours, retighten the mounting nuts.
CLEAN AND CHECK RADIATOR FINS AND OIL COOLER FINS
If there is any mud or dirt stuck to the radiator or oil cooler, clean them.
Check the rubber hoses. If they are cracked or fragile, replace them. Also, check the hose clamp for looseness.
METHOD FOR CLEANING FIN BY ROTATING HYDRAULIC DRIVE FAN IN RE-
VERSE
NOTICE
When the hydraulic drive fan rotates in reverse, take extreme care of scattering of dust.
When stopping the engine during the Fan Reverse Mode, first run the engine at low idle, then stop it.
k
k
WARNING
Criteria ( mm)
Standard
Repair limit
dimension
80
55
80
55
MAINTENANCE PROCEDURE
4-27
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