Tadano GR-700N, Service Manual

Page: 58 / 200

Y-6 Y-6
Assembly Adjustment (Crane Operation)
45
WY05-3911E
4. Tighten adjustment nut C of the top boom section
retraction wire rope until the top and 5th boom
sections are blocked by their respective stoppers
(the boom sections are fully retracted).
5. Extend the boom by 200 to 300 mm (0.656 to
0.984 ft). Then retract it slowly and check that the
stoppers on the 4th, 5th and top boom sections
contact at the same time. If any stoppers fail to
contact, follow the below procedure to check and
adjust it.
Slack Tense
Check the tension of the 5th boom section extension wire rope.
Evenly tighten adjustment nuts A (2
points) of the 5th boom section extension
wire rope by approx. 1/4 turn.
Evenly loosen adjustment nut C (2
points) for the top boom section
retraction wire rope by approx. 1/2 turn.
Extend and fully retract
the boom to check.
End
Only the 5th boom
section extends.
NG
OK
NG
Evenly tighten the right and left adjustment nuts B
(2 points) of the top boom section extension wire
rope by approx. 1/2 turn each.
NG
OK
Extend and fully retract
the boom to check.
Extend and fully retract
the boom to check.
Without interruption, continue with "Adjusting top end upper slide plate
(3rd boom section to 5th boom section)".