Manitowoc 999 User Manual

Reference Only
Manitowoc Published 05-15-17, Control # 043-09 4-45
999 LUFFING JIB OPERATOR MANUAL SETUP AND INSTALLATION
4
Preparing Boom and Luffing Jib
The luffing jib must be prepared as follows for fixed jib
installation and use:
1. 40 ft (12,2 m) insert with jib backstay lugs installed next
to luffing jib top as shown in Figure 4-23
, View D.
2. Lower boom point sheaves removed, if required per
Luffing Jib Raising Procedure Chart in Luffing Jib
Operator’s/Parts Manual.
Installing Jib
See Figure 4-22 for proper assembly sequence of jib
sections and pendants.
Install Jib Butt
See Figure 4-23 for the following procedure.
NOTE: The jib strut and jib stop are shipped in the stored
position on the jib butt as shown in View A.
1. Lift jib butt into position at end of luffing jib top.
2. Align holes in jib butt with holes in luffing jib top and
install connecting pins (1, View A).
3. Lower jib butt onto blocking 6 in (127 – 152 mm) high.
Install Jib Inserts
See Figure 4-23 for the following procedure.
1. Pin desired length of jib inserts to butt. Pin heads must
be toward outside of jib (View F).
Pin only the top connectors on the insert next to the jib
butt.
2. Block inserts as assembly progresses.
Install Jib Top
See Figure 4-23 for the following procedure.
1. If not already done, pin roller to bracket on end of jib top
(View G).
2. Pin jib top to last insert or butt, depending on jib length.
Pin heads must be toward outside of jib (View F).
Install Jib Pendants
See Figure 4-23 for the following procedure.
The jib pendants are furnished in matched sets of two and
must be installed in matched sets — pendant on one side of
jib section must match pendant on other side of jib section.
1. Pin basic pendants (P1) to jib top (View C) and lay
pendants on ground along side jib.
2. If required, pin required insert pendants (P2 or P3) to
basic pendants (P1).
3. Pin links and other end of basic or insert pendants
(depending on length) to jib strut (View B).
4. Pin spreader bar between links (View B).
Install Backstay Pendants
The backstay pendants are furnished in matched sets of two
and must be installed in matched sets — pendant on one
side of luffing jib section must match pendant on other side of
luffing jib section.
NOTE: If the boom and luffing jib will be jack-knifed into
position before the fixed jib is installed, perform
step 1
before raising the boom and luffing jib.
1. Pin backstay pendants (P4 and P5) to lugs on luffing jib
insert and to each other (Figure 4-23
, View E).
2. Lay backstay pendants on ground along side of luffing
jib.
NOTE: The jib strut will be raised and the backstay
pendants pinned to the strut after the boom and
luffing jib are raised.
Connect Jib Sections to Jib Butt
See Figure 4-23, View H for the following procedure.
1. Attach nylon lifting slings to chords at top end of jib butt.
2. Hook assist crane to slings. Crane must have capacity
to lift 1/2 the weight of assembled fixed jib.
3. Lift jib butt until bottom connecting holes between jib butt
and adjacent insert line up.
4. Install bottom connecting pins.
5. Remove slings.

Manitowoc 999 Specifications

General

Brand	Manitowoc
Model	999
Category	Construction Equipment
Language	English