Komatsu WA600-8 Operation & Maintenance Manual page 410

MAINTENANCE PROCEDURE
For applying grease to dump cylinder pin (2), bell crank pin (3),
bucket link pin (4), bucket hinge pin (5), and lift cylinder pin (6),
the bucket should be lowered to the ground with the bucket on
the level.
1.
Set the frame lock bar to LOCK position (L).
2.
By using a grease pump, pump in grease through the
grease fitting shown by arrow.
3.
After greasing, wipe off any old grease that is pushed out.
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MAINTENANCE