Manitowoc Published 08-12-19, Control # 224-13_v2 4-83
MLC650 OPERATOR MANUAL SET-UP AND INSTALLATION
Remove Counterweight Boxes from Trailer
NOTE: One or two boxes can be lifted at a time.
1. Use lifting slings to remove the counterweight boxes
from the trailers.
2. Remove the tie downs and blocking securing the
counterweight box to the trailer.
3. Remove the counterweight box from the trailer.
4. Remove the trailer.
5. Place the counterweight in the assembly area for
installation later.
6. Disconnect the lifting slings from the counterweight box.
7. Repeat the steps for all of the counterweight boxes.
Assemble Boom and Jib
The boom and jib can be assembled with the MLC650 mast
and self-erect cylinder or with an assist crane. See "Boom
And Jib Rigging—General" on page 4-88 for instructions.
If the MLC650 will be used to assemble the boom and jib,
install the counterweight boxes after the boom and jib are
assembled. The MLC650 will be much easier to maneuver
without the crane counterweight.
Install Counterweight Boxes
NOTE: The counterweight boxes must be removed from
the trailers and installed using an assist crane.
See Figure 4-66
for the following procedure:
Prior to stacking the counterweight boxes, position the
counterweight tray (1) on the rotating bed (2) so that the
forward physical stop on the tray (3) contacts the forward
physical stop on the rotating bed (4).
NOTE: Reference the Counterweight Tray Assembly
Drawing at the end of this section and the
Counterweight Arrangement Chart in the Capacity
Chart Manual supplied with the crane for the
allowable counterweight stacking arrangements.
WARNING
Crush Hazard!
• Do not lift more than two boxes at a time. The lifting
lugs may break resulting in the boxes falling.
WARNING
Tipping Hazard!
Prior to stacking the counterweight boxes, position the
counterweight tray all the way forward.
The counterweight tray weighs 20 000 kg (44,000 lb)
Each counterweight box weighs 10 000 kg (22,000 lb)
WARNING
Crush Hazard!
To prevent the crane from tipping and the a counterweight
boxes from falling off the tray during assembly/
disassembly:
• Do not install (or remove) the counterweight boxes
until the counterweight tray is traveled fully forward
against the physical stops on the rotating bed. The
crane will tip.
To prevent the counterweight boxes from falling and
crushing personnel:
• Do not lift more than two boxes at a time. The lifting
lugs may break resulting in the boxes falling.
• Stack the counterweight boxes as follows: install one
box on one side of the tray and then two boxes should
be placed on the other side. Then alternate from side
to side with two boxes; finally install one box to level
the sides.
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