Komatsu D65EX-12 Operation & Maintenance Manual page 200

SERVICE PROCEDURE
The symbols in the work equipment column have the following meaning.
A: Powertilt dozer (D65EX)
B: Powertilt dozer (D65PX)
C: Powertilt, Power pitch dozer (D65PX)
D: Semi-U blade (3m) (D65EX)
E: Semi-U blade (D65EX) (D65EX wide gauge specified)
F: Angledozer (D65EX)
REMARK
If the cutting edge and the end bit on both sides are worn out, replace with new one.
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.
1) Remove nut (1) and bolt (2), then replace or reverse
the cutting edge and the end bit.
2) Install the cutting edge to the blade and tighten the
bolt temporarily. Press the blade against the ground
to eliminate the play of bolt (2), then tighten the bolt
to the specified torque.
Nut tightening torque:
Powertilt dozer (EX): 461 ± 69 N•m (47 ± 7 kgf•m, 340 ± 51 lbft)
Powertilt, power pitch dozer (PX): 461 ± 69 N•m (47 ± 7 kgf•m, 340 ± 51 lbft)
Semi-U dozer (EX) (cutting edge): 461 ± 69 N•m (47 ± 7 kgf•m, 340 ± 51 lbft)
Semi-U dozer (EX) (EX wide gauge specified) (end bit): 745 ± 108 N•m (76 ± 11 kgf•m, 549.7 ± 79.6 lbft)
Semi-U dozer 3m (EX) (end bit): 461 ± 69 N•m (47 ± 7 kgf•m, 340 ± 51 lbft)
Angle dozer (EX): 441± 49 N•m (45 ± 5 kgf•m, 325 ± 36 lbft)
If bolt (2) and nut (1) are damaged, replace them with new ones at the same time.
6. After several hours of running, retighten the nuts.
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MAINTENANCE