Manitowoc MLC90A-1 User Manual

Manitowoc Published 12-10-19, Control # 258-05 4-55
MLC90A-1/MLC100-1 OPERATOR MANUAL SETUP AND INSTALLATION
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JIB #117 ASSEMBLY
See the #117 Jib Rigging Drawing at end of this section for
jib makeup.
The jib bottom (1, Figure 4-37)
is shipped as an assembled
unit consisting of the following:
• Jib butt
• Jib strut
• Strut raising arm
• Strut stops
The jib bottom and the jib top can be shipped as an
assembled unit.
The jib can be assembled with an assist crane or with this
crane.
NOTE See Figure 4-13 on page 4-21
for jib section lifting
locations.
Prepare Boom
See Figure 4-37.
If the boom is already assembled and attached to the crane,
proceed as follows.
1. Lower the boom (2, View A) onto the blocking (3)
specified in View A.
2. Remove the load line from the upper boom point, if
equipped.
3. Remove and store the upper boom point.
Install Jib Bottom
1. Lift the jib bottom (1, View A), and the jib top if shipped
pinned to the jib butt, into position at the boom top (2)
and remove the pins (3, View B) from the jib bottom.
2. Align the connecting holes and pin the jib bottom to the
boom top with the pins (3, View B) and the safety pins.
3. Lower the jib bottom onto blocking and disconnect the
lifting slings.
Install Jib Inserts
1. Disconnect the jib top from the jib butt If the jib top was
shipped pinned to the jib butt.
2. If desired, lift the jib insert (5, View B) into position at the
jib bottom (1) and remove the four pins (4, View C) from
the jib insert.
3. Align the top connecting holes and pin the jib insert to
the jib bottom with the pins (4, View C) and the safety
pins.
4. Lower the jib insert onto blocking and disconnect the
lifting slings.
5. Connect the lifting slings to the top end of the chords on
the jib bottom (1, View D).
6. Raise the jib bottom until the bottom connecting holes
are aligned between the jib bottom and the jib insert.
7. Pin the jib insert to the jib bottom with the pins (4, View
F) and the safety pins.
8. Disconnect the lifting slings.
9. Repeat the above steps for any remaining jib inserts.
Install Jib Top
NOTE Disregard this step if the jib top was shipped pinned
to the jib butt and no inserts were added.
1. Lift the jib top (6, View G) into position at the jib bottom
(1) or the jib insert (5) and remove the four pins (4, View
C) from the jib top.
2. Align the top connecting holes and pin the jib top to the
jib bottom or the jib insert with the pins (4, View C) and
the safety pins.
3. Lower the jib top onto the ground and disconnect the
lifting slings.
4. Connect the lifting slings to the top end of the chords on
the jib bottom (1) or the jib insert (5, View G).
5. Raise the jib bottom or the insert until the bottom
connecting holes are aligned between the jib bottom or
the insert and the jib top.
6. Pin the jib top to the jib bottom or the insert with the pins
(4, View F) and the safety pins.
7. Disconnect the lifting slings.
CAUTION!
Avoid Structural Damage!
Block the boom top (2, View A) at least 711 mm (28 in)
high at the location shown in View A. This distance is
required to prevent the boom stop plates (1A, View B)
from contacting the boom top at locations X in Views A
and B.
WARNING!
Collapsing Jib Hazard!
To prevent death or serious injury, do not stand on, inside,
or under the jib sections during assembly. Always stand
outside of the jib sections while installing connecting pins.

Manitowoc MLC90A-1 Specifications

General

Brand	Manitowoc
Model	MLC90A-1
Category	Construction Equipment
Language	English