Reference
Only
Manitowoc
Published 01-08-13, Control # 049-05
4-65
2250 MAX-ER 2000 OPERATOR’S MANUAL
SET-UP AND INSTALLATION
4
JIB INSTALLATION — #132 JIB
General
The jib consists of a 20 ft (6,1 m) butt and a 20 ft (6,1 m) top,
providing a basic length of 40 ft (12,2 m). Inserts are
available in 20 ft (6,1 m) lengths, allowing the jib to be
lengthened to a maximum of 120 ft (36,6 m) as shown in
Figure 4-34.
Jib offsets of 5, 15, and 30
°
are obtained by changing the
length of jib backstay straps, links, and pendants as shown in
Figure 4-33.
The following instructions assume the boom is completely
installed and ready for operation.
Assist Crane Requirements
An assist crane with sufficient capacity to lift one half the
weight of the jib is required. See the Crane Weights in
Section 1 of this section for weights of jib components.
Jib Assembly Drawing
Jib components (top, inserts, butt, pendants) must be
assembled in proper sequence according to this section and
the Jib Assembly drawing in the Crane Operator’s Manual.
See Figure 4-34 to determine quantity and length of inserts
and pendants required for various jib lengths.
See applicable Jib Lifting Capacity Chart for boom and jib
length limitations.
Install Jib
Prepare Boom
1.
Lower boom to ground. Block if necessary.
2.
Remove load line from upper boom point, if equipped.
3.
Remove and store upper boom point (See Boom
Rigging in this section for instructions).
4.
Install jib backstay links between boom sections at
Location A or B, Figure 4-31. See Jib Assembly
Drawing for proper mounting location.
a.
If necessary, separate boom sections to provide
space for links.
b.
Lift a backstay link into position on either side of
required insert.
Lug at bottom connecting holes in link must be
toward outside of boom. (Figure 4-31, View E1).
c.
Lift backstay link upward and engage hole in link
with washer (2, Figure 4-31, View E1) on underside
of insert connector.
d.
For Location A, install retaining pin (3a, Figure 4-31,
View E1) through holes on butt side of link to
prevent link from falling off insert.
For Location B, move support cable assembly (3b,
Figure 4-31, View E2) from stored position to
erecting position to prevent link from falling off
insert. If necessary, adjust cable length so bottom
connecting holes are aligned when assist crane is
disconnected.
e.
Repeat steps 5b – 5d for backstay link on other side
of boom.
f.
Reconnect boom inserts.
Replace standard horizontal connecting pins
w i t h 1 0 - 2 7 / 3 2 i n ( 2 7 5 m m ) l o n g p i n s ( 4 ,
Figure 4-31, View E) supplied with backstay
links.
Install Jib Butt
NOTE:
The jib strut is shipped in the stored position on the
jib butt (Figure 4-31, View A).
1.
Lift jib butt into position at end of boom top.
2.
Align holes in jib butt with holes in boom top and install
connecting pins (Figure 4-31, View B).
Install Jib Inserts
NOTE:
The jib sections have FACT™ connectors.
•
The top connectors are joined by fixed vertical pins that
hook into holes in the adjacent section (Figure 4-31,
View C).
•
The bottom connectors are joined by removable
horizontal pins (Figure 4-31, View D).
1.
Pin desired length of jib inserts to butt. Tapered end of
pins must point inward.
2.
Block inserts at ground level as assembly progresses.
Install Jib Top
Pin jib top to last insert or butt, depending on jib length.
WARNING
Collapsing Jib Hazard!
To prevent death or serious injury, do not stand on, inside,
or under jib during assembly or disassembly. Always
s ta n d o uts i d e o f j i b wh e n i n s tal l i ng or r e mo v i n g
connecting pins.
