Manitowoc Published 10-01-12, Control # 044-05 4-43
777 OPERATOR’S MANUAL SET-UP AND INSTALLATION
4
Removable Lacings
Removable diagonal lacings are provided with the #78
boom. This design feature allows the lacings to be removed
so that fixed and luffing jib sections can be stored inside the
inserts, thereby reducing shipping space and the number of
shipping vehicles required.
Table 4-2
Lacing and Rope Guard Requirements
Storing Jib Sections
See Figure 4-27 for following procedure.
To store jib sections inside # 78 inserts, proceed as follows.
1. Remove diagonal lacings from inserts (View A).
2. Remove rope guards from operating position on top
chords of inserts.
3. Fasten required number of rope guards to bottom
chords of inserts.
To prevent damage to rope guards, do not exceed 1,500
lb (680 kg) load on each rope guard.
4. Install jib sections inside inserts. Take extreme care not
to damage lacings or chords.
5. Adjust position of jib sections so that diagonal lacings
can be reinstalled.
6. Reinstall proper number of diagonal lacings with bolts
and nuts provided (View A). See Table 4-2 for lacing
requirements.
7. Securely attach jib sections to inserts so jib sections
cannot shift during transport.
Fasten tie-downs to rope guards or chords of inserts
only, not to lacings. Take care not to bend rope guards
when tightening tie-downs. Use protective covering such
as tire sections between tie-downs and chords or rope
guards.
Removing Jib Sections
See Figure 4-27 for following procedure.
To remove jib sections from inside the # 78 inserts proceed
as follow:
1. Remove diagonal lacings from inserts (View A).
2. Carefully remove jib sections from inside inserts. Take
extreme care not to damage lacings or chords.
3. Remove rope guards from bottom chords inside inserts.
4. Fasten rope guards in operating position on top chords
of inserts. See Table 4-2 for rope guards requirements.
5. Thoroughly clean all dirt from between lacings and
mating mounting surfaces on inserts.
6. Reinstall proper number of diagonal lacings in inserts
with bolts and nuts provided (View A). See Table 4-2 for
lacing requirements.
7. Securely tighten nuts.
# 78 Insert
Number of Diagonal
Lacings Required
Number of Rope
Guards Provided
20 ft (6.1 m) 2 1
40 ft (12.2 m) 4 2
* Remove required number of guards from operating
position and fasten in shipping position.
WARNING
Tipping Crane Hazard!
Remove rope guards from bottom chords inside inserts
before attempting to raise boom. Added weight of rope
guards inside inserts may cause crane to tip when boom is
raised.
WARNING
Falling Boom Hazard!
Securely reinstall diagonal lacings before attempting to
raise boom. Boom may collapse if lacings are not
reinstalled.
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