Method For Replacing Bucket Teeth - Komatsu H70051 Series Operation & Maintenance Manual

MAINTENANCE PROCEDURE
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 (2).
Tightening torque of mounting bolt: 883 to 1196 Nm {90 to 122 kgm}
6.
After operating for several hours, retighten the mounting bolts.

METHOD FOR REPLACING BUCKET TEETH

(if equipped)
• It is dangerous if the work equipment moves by mistake when the tooth is being replaced.
Set the work equipment in a stable condition on a ground, stop the engine, then press the work
equipment lock switch to lock the work equipment securely (the work equipment lock pilot lamp
lights up).
• If the pin is driven out with strong force, it is dangerous that the pin flies out. Check that there is no
person around the machine.
• Always wear the protective equipment such as protective eyeglasses and gloves since broken
pieces fly during the replacement work.
METHOD FOR REPLACING MONOBLOC TYPE TEETH
Replace the bucket teeth before the wear reaches to the edge of the bucket.
1.
Raise the bucket to a suitable height, then put a block (A)
under the bucket to prevent the bucket from lowering.
Set the bottom of bucket to be level, and put a block under
the bucket at the center.
2.
Lower the bucket on the block and stabilize it.
3.
Stop the engine.
4.
Remove the bolts and nuts (1) and (2), and remove the
bucket teeth (3).
5.
Clean the mounting surface of bucket teeth (3).
6.
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 thick of shim becomes impossible.
If the wear extends to the mounting surface, repair the mounting surface before installing.
7.
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 by using a hammer.
Tightening torque of mounting bolt
(1) : 1200 to 1330 Nm {122 to 136 kgm}
(2) : 814 to 912 Nm {83 to 93 kgm}
8.
After operating for several hours, retighten the mounting bolts.
METHOD FOR REPLACING TIP TYPE TEETH
Replace the tooth before the wear reaches to the adapter.
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WARNING
MAINTENANCE