Manitowoc MLC300 User Manual

Manitowoc Published 11-20-19, Control # 234-19 4-85
MLC300 OPERATOR MANUAL SETUP AND INSTALLATION
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Install Drop-Down Suspension
If the drop-down suspension is required per the Boom
Rigging Drawing in use, install it as follows:
1. Refer to the Boom Make-Up Table (see A, Figure 4-61
)
in the appropriate Boom Rigging Drawing at the end of
this section to determine the following:
- Whether or not the drop-down suspension is
required and its location
- Pendant button number that must be pinned to the
sockets
The Boom Make-Up Table will vary from one Boom
Rigging Drawing to another.
See Figure 4-60
for the remaining steps.
2. Prepare the drop-down suspension beam assembly (6,
View A):
• Unpin sockets (2, View E) from the pendant
installation position (B). The sockets should be
resting against the socket locking hitch pins (9, View
F).
• Install the hitch pins (11, View A) in the drop-down
suspension beam.
3. Attach lifting slings from the assist crane to the lifting
lugs (1, View F).
The drop-down suspension beam assembly weighs 400
kg (882 lb).
4. Lift the drop-down suspension beam assembly (6, View
A) into position at the end of the proper insert (3) so the
connecting pins (4) are in line with the bottom
connectors on the insert.
5. Disconnect the lifting slings.
6. Remove the standard strap links (7, View C) from both
sides of the adjacent insert (5). Place the pins with
collars (8) to the side for use later.
7. Store the standard strap links in the parts box or on the
suspension beam (View F) after the strap links (10) are
removed.
8. Attach the adjacent insert (5, View A) to the insert (3).
9. Block the adjacent insert (5, View A) so the bottom
connecting pin holes are aligned.
10. Remove the bottom connecting pins (4, View A) from the
drop-down suspension beam assembly.
11. Reattach the lifting slings from the assist crane to the
lifting lugs (1, View A) and lift the drop-down suspension
beam assembly into position so all of the connecting
holes are aligned (View B).
12. Install the connecting pins (4, View B) and the safety
pins.
13. Remove the socket locking hitch pins (9, View F), lower
the sockets (2, View E) to the pendant installation
position (B), and install the socket locking hitch pins (9,
View E).
14. Disconnect the lifting slings.
15. Remove the strap links (10, View F) from storage on the
beam.
16. Install the strap links (10, View D) with the pins (8). The
pin heads must face out.
17. Lay the drop-down suspension pendants (12, View B)
inside the insert (3).
18. Pin the drop-down suspension pendants (12, View B
and D) to the strap links (10) with the pendant pins (13).
19. Perform the remaining steps as the boom is raised:
a. As the boom straps rise during the boom raising
procedure (page 4-110
), guide the drop-down
pendants through the opening between the boom
inserts. Take care not to damage lacings.
b. Signal the crane operator to stop the boom raising
procedure when the required pendant buttons (14,
View E) are near the sockets (2B).
c. Remove the socket locking hitch pins (11, View A)
from the drop-down suspension beam.
d. Engage the required pendant button in each socket
(2, View E) and install the button retaining hitch pin
(11).
e. Remove the socket locking hitch pins (9, View E)
from the pendant installation position (B), rotate the
sockets to the working position (2A, View F) and
reinstall the socket locking hitch pins (9).
f. Continue with the boom raising procedure.
A
Example of Boom
Make-Up Table in
Boom Rigging Drawing
Figure 4-61

Manitowoc MLC300 Specifications

General

Brand	Manitowoc
Model	MLC300
Category	Construction Equipment
Language	English