Komatsu PC138USLC Operation & Maintenance Manual page 368

ATTACHMENTS AND OPTIONS
RECOMMENDED ATTACHMENT OPERATIONS
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 togather in pieces of rock
Operations using the swing force
Moving the chisel while carrying out impacting operations
Holding the chisel horizontal or pointed up when carrying out
impacting operations
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