Komatsu Utility 76243, Руководство по эксплуатации и техническому обслуживанию

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SERVICE PROCEDURE
MAINTENANCE
4-30
REVERSE AND REPLACE THE END BITS AND CUTTING EDGES
WARNING
It is dangerous if the work equipment moves by mistake when the cutting edges and end bits are being
reversed or replaced.
Set the work equipment in a stable condition, then stop the engine and lock the blade control lever
securely with the work equipment lock lever.
Reverse or replace the end bits and cutting edges before it is worn out to the blade end.
1. Raise the blade to a proper height, position a block under the frame to prevent the blade from falling.
2. Operate the work equipment lock lever to the LOCK position.
3. Measure the wear of the end bit and cutting edge in accordance with the wear standards given below.
Wear standards
The symbols in the Work equipment column are as follows.
A: Semi U-dozer, U-dozer
B: Angledozer
REMARK
If the cutting edge and the end bit on both sides are worn out, replace with new ones.
If it has been worn out up to the fitting surface, repair the fitting surface and then reverse or replace.
4. Remove the cutting edge and the end bit and clean the mounting surface.
5. Reverse or replace the cutting edge and the end bit when worn out.
Tightening torque for mounting nut
Semi U-dozer: 1330 to 1660 N·m (136 to 169 kgf·m)
Angledozer: 738 to 999 N·m (75.3 to 101.9 kgf·m)
(Unit: mm)
Item Judgment standard
NO.
Position of mea-
surement
Work
equipment
Standard
measurement
Wear limit
1
Height at outside
of end bit
A 415 300
B 292 211
2 Width of end bit
A 662 500
B 435 360
3
Height at inside of
end bit
A 330 260
B 254 211
4
Height of cutting
edge
(from center of
mounting bolt hole
to end face) A 165 95
B 127 86