Manitowoc Published 04-06-18, Control # 231-14 4-105
MLC650 VPC-MAX™ OPERATOR MANUAL SET-UP AND INSTALLATION
Opening the Boom Sections Using an Assist
Crane
The assist crane must have a capacity of 74 843 kg (165,000
lb).
See Figure 4-86
for the following procedure.
1. Attach two SL 1 slings (7) to the assist crane and to the
forward most lifting lugs on the equalizer insert (3).
2. Hoist with the assist crane only enough to tighten the
slings.
3. Manually remove the tapered connecting pins (1).
4. 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.
5. Store the tapered connecting pins (1) in the brackets (2)
on the equalizer insert (3).
6. Detach the SL 1 slings (7) from the equalizer insert (3).
7. To use the adjacent insert (4) in a different configuration,
reinstall the standard connecting pins (5) and brackets
with hardware (6). The parts are stored in the parts box.
Disconnecting the Equalizer from the
Equalizer Rails
See Figure 4-85 for the following procedure.
1. If not already done, lower the fixed mast (5, View B) to
no less than 39.7°.
2. Connect two SL 6 slings (8, View A) from the hook of the
assist crane (9) and to the front two lifting lugs (10) on
the equalizer (6).
3. Remove the front pins (1, View C) from the rails (3) and
the equalizer (6) and install the pins in the front storage
tubes (2).
Slacken or tighten the boom hoist wire rope as
necessary to loosen the pins.
NOTE: It is not necessary to remove the rear stop pins (1,
View C) and the rollers (1A, if equipped) if the insert
will be used with a VPC-MAX.
The rear stop pins and rollers (if equipped) must be
stored if the insert will be used in a boom rigging
without fixed mast.
4. SLOWLY lift the equalizer clear of the rails by hoisting
with the assist crane while hauling in the MLC650 boom
hoist wire rope.
5. Continue to haul in the boom hoist wire rope while
following with the assist crane until the equalizer (6,
View B) is hanging vertical under the fixed mast point.
6. Raise the fixed mast to no higher than 64.5°.
Disassemble the Boom Assembly
Completely disassemble the boom sections forward of the
equalizer insert (7, Figure 4-85
). Make sure all of the steps
are performed under the topic Boom #680 Disassembly in
Section 4 of the Crane Operator Manual.
CAUTION
Boom Damage!
Do not attempt to lift the entire boom during the following
step. Damage to the boom sections could result,
WARNING
Crushing Injury Hazard!
Prevent serious crushing injury:
• Do not stand inside the boom sections while installing
the tapered connecting pins — STAND OUTSIDE
BOOM.
CAUTION
Mast Damage!
Do not lower the fixed mast below 39.7° during the
following steps. Structural damage could result.
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