Manitowoc MLC165-1 User Manual

Manitowoc Published 08-06-19, Control # 237-09_v2 4-91
MLC165-1 OPERATOR MANUAL SETUP AND INSTALLATION
4
Boom #74A Assembly
Assemble Boom Inserts
See Figure 4-66 for the following procedure.
Assemble the boom in the exact sequence shown in the
Boom Assembly Drawing at the end of this section. Start with
the shortest insert and end with the longest insert at the top
of the boom.
Possible exception: If the 19.7 ft (6 m) insert with sheaves
is to be installed, it must be installed next to the boom butt.
Some boom lengths require intermediate suspension. To
determine the correct installation position of the intermediate
suspension, see the Boom Assembly Drawing and the
Intermediate Suspension Strut Assembly Drawing at the end
of this section.
1. Using the assist crane, remove the insert from the trailer:
a. Using a choker hitch, attach two synthetic lifting
slings (2, View A) to the top chords at the
approximate center of gravity of the insert (see
Figure 4-65 on page 4-89
).
b. Connect the synthetic lifting slings to the hook of the
assist crane.
c. Adjust the position of the slings so the insert is
approximately 9 in (229 mm) out of level when lifted
(butt end lower than top end).
d. Lift the insert off the trailer.
2. Place the first insert (1, View C) on blocking at least 9 in
(229 mm) high. This height will allow for installation of
the boom top.
3. Adjust the blocking as needed so the insert is level.
4. Repeat step 1
for the next insert.
5. Lift the next insert into position and align the top
connector holes.
6. Remove the four connector pins (3, View D) from the
storage brackets.
7. Install the top connector pins (3, View D), lower the
insert, and install the bottom connector pins. The pin
heads must face the outside.
8. Secure the pins with cotter pins or safety pins.
9. Block under the top end of the insert so the insert is
level.
10. Disconnect the lifting slings
NOTE If a fixed jib will be installed, the 39.4 ft (12 m) insert
with backstay lugs (4, View B) must be installed
next to the boom top (5).
If intermediate suspension is required, install the
intermediate suspension strut between the
required inserts. See Install Intermediate
Suspension Strut on page 4-93.
11. Repeat the above steps until all inserts are installed.
WARNING
Collapsing Boom/Crushing Injury Hazard!
To prevent death or serious injury, do not stand on, inside,
or under the boom sections when they are being lifted into
place.
Stay outside the boom sections when installing or
removing connecting pins. The boom sections can
collapse or shift suddenly when the pins are removed. To
avoid death or serious injury:
• Do not remove the connecting pins from any boom
section when the boom is supported by the straps.
• Do not remove the strap connecting pins until the
straps are fully lowered onto the boom sections.
• Do not remove the connecting pins from any boom
section when the boom point is resting on the ground
and the chain sling is slack.
• Never work or stand inside the boom unless it is
lowered and securely blocked.
• Do not stand or walk on top of the boom unless it has
catwalks.
CAUTION
Wire Rope Guide Damage
To avoid damage to the upper wire rope guide in the 19.7
ft (6 m) insert with sheaves, remove the upper wire rope
guide for clamshell operation.

Manitowoc MLC165-1 Specifications

General

Brand	Manitowoc
Model	MLC165-1
Category	Construction Equipment
Language	English