Komatsu PC118MR-8 Operation And Maintenance Manual page 414

OPTIONAL EQUIPMENT
RECOMMENDED ATTACHMENT OPERATIONS
NOTICE
If the breaker is greased in an improper posture, it is filled
with more grease than necessary. As a result, soil and
sand will enter the hydraulic circuit and can damage the
hydraulic components while the breaker is in use. Be sure
to grease the breaker, holding it in the right posture.
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