Manitowoc Published 05-15-17, Control # 043-09 4-7
999 LUFFING JIB OPERATOR MANUAL SETUP AND INSTALLATION
Connect Main Strut to Boom Top
See Figure 4-4, View A for the following procedure.
1. Remove pins (13) from connecting holes in end of main
strut.
2. Attach slings (5) from assist crane to four lifting lugs (6)
on main strut.
3. Slowly lift main strut until it is supported by assist crane.
4. Unpin strut supports (14, View A-A) from rigging position
and pin in storage position.
5. Align connecting holes in end of strut with holes in boom
top and install pins (13).
6. Unpin strut supports (14, View A-A) from storage
position and pin in rigging position.
7. Remove slings (5).
Raise Jib Strut to Assembly Position
See Figure 4-4 for the following procedure.
1. Attach slings from assist crane to top two lifting lugs (6,
View A) on jib strut.
2. Lift jib strut just enough to loosen pins (15, View B) and
remove pins.
3. Lift jib strut clear of strut supports (16, View B).
4. Rotate strut support (16) to assembly position and install
pins (15, View C).
5. Remove pins (17, View B) from strut supports.
6. Align connecting holes in strut with connecting holes in
strut supports (16) and install pins (17, View C).
Install Jib Inserts
• Determine jib length required for lift to be made.
• Pin inserts to butt in proper sequence — see Luffing Jib
Rigging Drawing.
See Figure 4-4
View D for the following procedure.
1. Remove retaining pins (18) from hooked connectors
(19).
2. Lift insert into position at end of butt and engage fixed
pins (20) in insert with hooked connectors (19) in butt.
Each jib section has four lifting lugs (22, View G).
3. Install retaining pins (18).
4. Lower insert until bottom connecting holes line up and
install connecting pins (21, View G).
5. Connecting pins are stored in pockets on vertical lacings
of adjacent insert (View G).
6. Install blocking under top end of insert.
7. Repeat steps 1
– 5 for remaining inserts.
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