Komatsu HB365LC-3 Operation & Maintenance Manual page 479

ATTACHMENTS AND OPTIONS RECOMMENDED ATTACHMENT OPERATIONS
Do not pry the ground or rock with the chisel penetrated.
Do not perform pick work.
Do not perform the operation with bucket cylinder rod extended
fully to raise the machine off the ground.
Do not perform the breaker work with any cylinder at the stroke
end.
When greasing the hydraulic breaker, set it in the specified posture.
NOTICE
If the breaker is greased in an improper posture, it is filled with more grease than necessary.
As a result, dirt will enter the hydraulic circuit and can damage the hydraulic components while the
breaker is in use.
Be sure to grease the breaker, keeping it in the right posture.
Grease the breaker while holding it in the right posture shown below.
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