Reverse And Replace The End Bits And Cutting Edges - Komatsu D65EX-12 Operation & Maintenance Manual

MAINTENANCE

REVERSE AND REPLACE THE END BITS AND CUTTING EDGES

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