Method For Replacing Bucket Teeth - Komatsu WA380-8 Operation & Maintenance Manual

MAINTENANCE
1.
Raise the bucket to a suitable height, then put a block (A)
under the bucket to prevent the bucket from lowering.
Raise the bucket to make its bottom surface level.
2.
Remove bolts and nuts (1), then remove cutting edge (2).
3.
Clean the mounting surface of cutting edge (2).
4.
Turn cutting edge (2) and install it to the bucket.
When turning the edge, install it to the opposite side (left
edge to right side, right edge to left side).
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 the cutting edge.
5.
Tighten bolts and nuts (1) uniformly so that there is no gap between the bucket and cutting edge.
Tightening torque of mounting bolt: 745 ± 108 Nm {76 ± 11 kgm}
6.
After operating for several hours, retighten the mounting bolts.

METHOD FOR REPLACING BUCKET TEETH

(if equipped)
Replace the bucket teeth before they are worn to the bucket end face.
1.
Raise the bucket to a suitable height, then put a block (A)
under the bucket to prevent the bucket from lowering.
Raise the bucket to make its bottom surface level.
2.
Remove the bolts and nuts (1) and (2), and remove bucket
teeth (3).
3.
Clean the mounting surface of bucket teeth (3).
4.
Install a new teeth to the bucket.
Eliminate the clearance between the teeth and top face of
the bucket by inserting shims.
Continue the adjustment with shims until the insertion of
0.5 mm {0.02 in} thick of shim becomes impossible.
If the wear extends to the mounting surface, repair the mounting surface before installing.
5.
In order to eliminate the clearance between the bucket teeth and the top end of the bucket, tighten bolts
and nuts (1) and (2) lightly, then tap the teeth ends using a hammer.
Tightening torque of mounting bolt
(1): 637 to 853 Nm {65 to 87 kgm}
(2): 618 Nm {63 kgm}
6.
After operating for several hours, retighten the mounting bolts.
METHOD FOR REPLACING KMAX TEETH
(if equipped)
Replace the tooth before the wear reaches to the adapter.
Items to be prepared
Socket wrench with 11 mm of width across flats and torque wrench
REMARK
The wear will become uniform by rotating the mounting position of the tooth. This will extend the service life of
the tooth and reduce the frequency of replacement.
MAINTENANCE PROCEDURE
4-31