Komatsu PC220LC -8 Operation & Maintenance Manual page 390

ATTACHMENTS AND OPTIONS ATTACHMENTS AND OPTIONS
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.
Do not operate all cylinders to the end of their strokes. Always leave approx. 5 cm (2 in) to spare.
Using the mount to gather in pieces of rock
RECOMMENDED ATTACHMENT OPERATIONS RECOMMENDED ATTACHMENT OPERATIONS
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