Komatsu PC220LC -8 Operation & Maintenance Manual page 392

ATTACHMENTS AND OPTIONS ATTACHMENTS AND OPTIONS
Extending the bucket cylinder fully and thrusting to raise the
machine off the ground
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 sand 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.
RECOMMENDED ATTACHMENT OPERATIONS RECOMMENDED ATTACHMENT OPERATIONS
6 - 37