Komatsu PC220LC -8 Operation & Maintenance Manual page 226

OPERATION OPERATION
REMARK
When reversing, do not install an O-ring. Keep the O-ring in a safe
place until using it next.
5. Install the stopper bolts and nuts for each pin, then grease the
pin.
REMARK
Lubricate with grease thoroughly until the grease comes out
from the end face.
When replacing the bucket, replace the dust seal if it has been
damaged. If a damaged seal is used without being replaced,
sand and dirt may enter the pin portion and cause abnormal
wear of the pin.
MACHINE OPERATIONS AND CONTROLS MACHINE OPERATIONS AND CONTROLS
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