Manitowoc Published 07-23-15, Control # 078-03 4-13
31000 LUFFING JIB OPERATOR MANUAL SET-UP AND INSTALLATION
12
Information below from drawing A19443, Sheet 9:
Use an assist crane (A) to place counterweight boxes (C or D) at the end of the jib strut (B) as shown below:
• For cast counterweights (C), attach the lifting sling (E) to rollers (F).
• For fabricated counterweights (D), first place blocking (H) under the strut top (I). Then attach the lifting sling (E)
to shackles (G).
Step Action
Item Description
A Assist crane.
B 31.2 m (102 ft 5 in)
C Cast counterweights (10 metric tons each).
D Fabricated counterweights (20 metric tons each).
E Lifting sling.
F Roller.
G Shackle.
H Blocking.
I Strut top.
A
B
C
D
E
E
F
G
H
H
FIGURE 4-13
I
I
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