Komatsu ecot3 Operation And Maintenance Manual page 229

MACHINE OPERATIONS AND CONTROLS MACHINE OPERATIONS AND CONTROLS
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.
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OPERATION OPERATION