Komatsu PW98MR-10 Operation & Maintenance Manual page 350

MAINTENANCE PROCEDURE
(2) Boom cylinder base pin (1 point)
(3) Boom swing support pins (2 points)
Supply grease to the boom swing bracket pin according to
the following procedure.
1)
Set the boom to the swing neutral position and supply
grease to the pin.
2)
Swing the boom to the left stroke end and supply
grease to the pin.
3)
Swing the boom to the right and left several times.
(4) Boom swing cylinder rod end pin (1 point)
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MAINTENANCE