Tadano GR-700N - Adjusting Procedure (Electric); Switch Adjustment Procedure; Boom Full Retraction Detection Switch (CN552); Over-Front Detection Switch (CN521)

Y-5
Y-5
Adjusting Procedure (Electric)
34
WY04-2071E
Y-5 Adjusting Procedure
(Electric)
1. Switch adjustment procedure
1.1 Over-front detection switch (CN521)
1. Apply a thread locking agent (ThreeBond 1401 or
the equivalent) to the threaded section of the
switch beforehand.
2. Slew the boom to the over-front and set the boom
angle 60° or higher. Then engage the slewing lock
pin.
3. Adjust the clearance between the detection face
of the switch and the cam. Then fix the switch
using a nut. (Make sure that the green LED lights
up at this time.)
• Nut tightening torque:
19 to 20 N-m {193 to 204 kgf-cm} (14 to 14.8 ft-lbf)
1.2 Boom full retraction detection switch
(CN552)
Adjust the switch position so that its contact is
shifted (opened/closed) when the top boom
section is extended/retracted. The position is 5 to
8 mm (0.2 to 0.31 in) longer than its fully retracted
length.
• Switch fixing bolt tightening torque:
4.9 to 5.9 N-m {50 to 60 kgf-cm} (3.6 to 4.4 ft-lbf)
△
2
349-503-
30000
△
5
343-633-
72000
5th boom section
Top boom section
Detail A
Upper face of slewing table
View A
2–2.5 mm (0.08–0.1 in)
Upper face of lower frame
Cutout end of
lower frame
Front
Slewing center
Cam