Komatsu PC78US-6 Operation & Maintenance Manual page 282

ATTACHMENTS AND OPTIONS
RECOMMENDED ATTACHMENT OPERATIONS
Greasing
Supply grease in the correct position.
NOTICE
If the breaker is greased in an improper posture, it is filled with more grease
than necessary. As a result, soil and san will enter the hydraulic circuit and
can damage the hydraulic components, while the breaker is in use.
Therefore, be sure to grease the breaker, holding it in the right posture.
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