Komatsu PC210-10 DEMOLITION BASE SPEC., Operation & Maintenance Manual, Page: 441 / 458

ATTACHMENTS AND OPTIONS RECOMMENDED ATTACHMENT OPERATIONS
6–43
When applying continuous impact to the same impact surface,
if the chisel does not penetrate or break the surface within one
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.
WRONG USAGE
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 approximately 5 cm to spare.
Using the mount to gather in pieces of rock