Manitowoc Published 07-23-15, Control # 078-03 4-25
31000 LUFFING JIB OPERATOR MANUAL SET-UP AND INSTALLATION
25
Information below from drawing A19443, Sheet 14:
Jib backstay spreader connection for boom lengths less than 70 m (229.7 ft):
• Jib backstay straps shall be connected (see Figure 4-24
).
• Place the jib backstay spreader (A) on the boom insert closest to the last connected jib backstay strap.
• Except for a boom length of 55 m (180.5 ft), the jib backstay spreader pad (E) should rest on a jib backstay strap.
• Remove the jib backstay spreader tie rod (G).
• Position the Drum 5 wire rope (B) above the jib backstay spreader (A).
• Position the Drum 6 winch wire rope (C) under the jib backstay spreader (A).
• Place the upper wire rope guard (D) in the stowed position as shown below. After the main strut is erected, place
the upper wire rope guard (D) back to its working position.
• Attach the jib backstay spreader (A) to the jib backstay straps (F) (see Figure 4-24
).
Step Action
FIGURE 4-25
Item Description
A Jib backstay spreader.
B Drum 5 wire rope.
C Drum 6 winch wire rope.
D Wire rope guard.
E Jib backstay spreader pad.
F Jib backstay strap.
G Jib backstay spreader tie rod.
B
Spreader assembly connection for cranes with boom lengths less than 70 m (229.7 ft)
60 m (196.9 ft) boom length configuration shown above.
C
D (upper)
E
A
F
F
F
F
G
D (lower)
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