Komatsu PC450-8 Operation & Maintenance Manual page 390

ATTACHMENTS ANDD OPTIONS
RECOMMENDED ATTACHMENT OPERATIONS
When applying impact, push the chisel against the impact sur-
face and operate so that the chassis rises approx. 5 cm off the
ground. Do not let the machine come further off the ground
than this amount.
When applying continuous impact to the same impact surface,
if the chisel does not penetrate or break the surface within 1
minute, change the point of impact and carry out breaking
operations closer to the edge.
The direction of penetration of the chisel and the direction of
the breaker body will gradually move out of line with each
other, always adjust the bucket cylinder to keep them aligned.
Always keep the chisel pressed against the impact surface
properly to prevent using the impact force when there is no
resistance.
Prohibited Works
To ensure that the machine has a long life, and to ensure that operations are carried out in safety, do not operate
the machine in any of the following ways.
q
Do not operate all cylinders to the end of their strokes. Always leave approx. 5 cm to spare.
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