Komatsu D65EX-12 - Reverse and Replace the End Bits and Cutting Edges

MAINTENANCE SERVICE PROCEDURE
4-31
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 safety 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 and apply a block to the frame so as to prevent fall of the blade.
2. Operate the safety 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
Unit: mm (in)
Item Judgement standard
No.
Measurement
point
Work
equipment
Standard
dimension
Repair
limit
1
Height of
outside of
end bit
A 237 (9.3) 204 (8.0)
B,C 204 (8.0) 187 (7.4)
D 292 (11.5) 254 (10.0)
E 315 (12.4) 254 (10.0)
F 237 (9.3) 204 (8.0)
2
Width of end
bit
A 325 (12.8) 300 (11.8)
B,C 325 (12.8) 300 (11.8)
D 435 (17.1) 410 (16.2)
E 540 (21.3) 515 (20.3)
F 325 (12.8) 310 (12.2)
3
Height of
inside of end
bit
A 204 (8.0) 187 (7.4)
B,C 204 (8.0) 187 (7.4)
D 254 (10.0) 237 (9.3)
E 254 (10.0) 237 (9.3)
F 204 (8.0) 187 (7.4)
4
Height of
cutting edge
(from center of
bolt mounting
hole to end
face)
A 102 (4.0) 85 (3.3)
B,C 102 (4.0) 85 (3.3)
D 127 (5.0) 103 (4.1)
E 102 (4.0) 85 (3.3)
F 102 (4.0) 85 (3.3)