Manitowoc Published 10-01-12, Control # 044-05 4-57
777 OPERATOR’S MANUAL SET-UP AND INSTALLATION
4
Installing Jib
See Figure 4-36 for following procedure unless otherwise
noted.
Prepare Boom
1. Lower boom onto blocking.
2. Remove load line from upper boom point, if equipped.
3. Remove and store upper boom point (See Boom
Rigging Guide in this section.
4. Remove optional cage-type rope guard from lower boom
point (View F).
5. Make sure boom insert with jib backstay lugs is installed
next to boom top.
Install Jib Butt
NOTE: The jib strut and jib stop assembly are shipped in
the stored position on the jib butt (View D).
1. Lift jib butt into position at end of boom top (View C).
2. Align holes in jib butt with holes in boom top and install
connecting pins.
Install Jib Inserts
NOTE: See Figure 4-34 or to Jib Assembly drawing for
required jib inserts and pendants for each jib
length.
1. Pin desired length of jib inserts to butt:
• Wire rope roller guides must face up (View A).
• Shortest inserts must be closet to butt (Figure 4-34).
• Pin heads must be toward outside of jib (View B).
2. Wire rope rollers on inserts may be shipped upside
down. If necessary, unscrew and reattach brackets and
roller rightside up (View A).
3. Block inserts at ground level as assembly progresses.
Install Jib Top
Pin jib top to last insert or butt, depending on jib length:
• Pendent lugs on top must face up.
• Pin heads must be toward outside (View B).
• Wire rope timber guide installed (View B).
WARNING!
Collapsing Jib Hazard!
To prevent death or serious injury, do not stand on, inside,
or under jib during assembly. Always stand outside of jib
when installing connecting pins.
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