Manitowoc Published 04-06-18, Control # 231-14 4-103
MLC650 VPC-MAX™ OPERATOR MANUAL SET-UP AND INSTALLATION
Opening the Boom Sections Using the Fixed
Mast
See Figure 4-84 for the following procedure.
1. 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).
2. Remove the front stop pins (5, View D) from the rails (6)
and the equalizer (3) and store the pins in the front
storage tubes (7, View E).
3. Do not remove the rear stop pins (5, View C) and the
rollers (5A, if equipped).
4. 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.
5. Manually remove the tapered connecting pins (9, View
A).
6. Lower the inserts onto blocking that is at least 610 mm
(24 in) high.
To prevent damage to the boom sections caused by
excessive sag, space the blocking at the intervals
specified under “Intermediate Blocking” requirement in
the Boom Rigging Drawing at the end of this section.
7. Store the tapered connecting pins (9, View A-A) in the
brackets (10) on the equalizer insert (4).
8. 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.
9. Remove the front stop pins (5, View E) from the front
storage tubes (7) and install the stop pins (5, View D) in
the front holes of the rails (6) and the equalizer (3).
10. 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.
11. The shackles can remain attached to the equalizer.
12. To use the adjacent insert (8) in a different configuration,
reinstall the standard connecting pins (11) and brackets
with hardware (12). The parts are stored in the parts box.
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.
CAUTION
Boom or Mast Damage!
Do not attempt to open 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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