Manitowoc Published 04-06-18, Control # 231-14 4-73
MLC650 VPC-MAXâ„¢ OPERATOR MANUAL SET-UP AND INSTALLATION
Closing the Boom Sections Using the Fixed
Mast
See Figure 4-63 for the following procedure.
1. Tapered connecting pins (9, View A-A) are stored in
brackets (10) on the equalizer insert (4).
2. To pin the adjacent insert (8) to the equalizer insert (4),
remove the standard connecting pins (11, View A-A) and
the brackets with hardware (12) from the adjacent insert.
3. Store the removed parts in the parts box.
4. Attach two SL 1 slings (1, View C) to the shackles (2) on
the equalizer (3) and to the forward most lifting lugs on
the equalizer insert (4, View A).
5. Remove the front stop pins (5, View D) from the holes in
the rails (6) and the equalizer (3) and store the pins in
the storage tubes (7, View E).
6. Do not remove the rear stop pins (5, View C) and rollers
(5A, if equipped).
7. Slowly haul in the boom hoist wire rope on the MLC650
until the boom hoist equalizer (3, View A) is out of the
rails and the SL 1 slings (1) are tight.
8. Remove the tapered connecting pins (9, View A-A) from
the brackets (10).
9. Slowly continue to haul in the boom hoist wire rope to
raise the boom sections until the bottom connecting
holes are aligned between the equalizer (4, View A) and
the adjacent insert (8).
10. Manually install the tapered connecting pins (9, View A)
in the bottom connecting holes.
11. Slowly pay out the boom hoist wire rope until the
equalizer (3, View C) is resting on the rails and the SL 1
slings (1) are slack.
12. Remove the front stop pins (5, View E) from the front
storage tubes (7) and install the stop pins (5, View D) in
the holes of the rails (6) and the equalizer (3).
13. Disconnect the SL 1 slings (1, View C) from between the
shackles (2) on the equalizer (3) and the lifting lugs on
the equalizer insert.
14. The shackles can remain attached to the equalizer.
Finishing Boom Assembly
Make sure all of the steps are performed under the topic
Boom #680 Assembly in Section 4 of the Crane Operator
Manual.
WARNING
Tipping Hazard!
Do not exceed the boom closing (opening) limitations
given in the Boom Rigging Drawing at the end of this
section. Make sure the crane is equipped with the
specified counterweight. Otherwise, tipping could occur.
CAUTION
Mast Damage!
Do not lower the fixed mast below 39.7° during the
following steps. Structural damage could result.
WARNING
Falling Object Hazard!
If the standard connecting pins (11, View A-A) and
brackets with hardware (12) are not removed from the
adjacent insert (8) before raising the boom, they may fall,
potentially resulting in death or serious injury.
CAUTION
Boom or Mast Damage!
Do not attempt to close the boom with the fixed mast until
the equalizer is unpinned from the rails in step 5
. Damage
will result,
CAUTION
Boom or Mast Damage!
Do not attempt to lift the entire boom during the following
step. Damage to the fixed mast and/or boom could result.
Do not exceed a mast strap tension of 160,6 t (354,000
lb). Mast strap tension can be monitored in the Crane
Status Bar of the Main Display (View C, Figure 4-64 on
page 4-74).
WARNING
Crushing Injury Hazard!
Prevent serious crushing injury:
• Do not stand inside the boom sections while installing
the tapered connecting pins — STAND OUTSIDE
BOOM.
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