Manitowoc Published 04-06-18, Control # 231-14 4-65
MLC650 VPC-MAXâ„¢ OPERATOR MANUAL SET-UP AND INSTALLATION
Raising the Mast Stops
See Figure 4-57 for the following procedure.
1. Raise the live mast (7) to a maximum angle of 150°.
2. Attach one SL 4 sling (1) to one of the mast stops (2)
and to the assist crane.
3. Hoist with the assist crane just enough to support the
weight of the mast stop (2).
4. Remove the top pin (3, View A) securing the bracket (4)
to the bracket (5).
5. Lift the mast stop to the working position (View B).
6. Remove the bottom pin (3, View A) from the bracket (5).
7. Raise the mast stop strut (6, View B) to the working
position.
8. Using pin (3, View B), pin the slotted end of the mast
stop strut (6) to the TOP holes in the bracket (4).
9. Store the other pin (3, View B) in the bracket (5).
10. Disconnect the sling and repeat the procedure for the
other mast stop.
Preparing the Equalizer
See Figure 4-58 for the following procedure.
1. Remove the rope guard (6).
2. Attach four SL 4 slings (1) to four lifting lugs (2) on the
equalizer (5) and to the assist crane.
3. Remove the locking pins (3).
4. Remove the clevis pins (4).
5. Pay out wire rope from the boom hoist drum in the mast
butt while performing the next step.
6. Using the assist crane, remove the equalizer (4) from
the fixed mast top.
7. Set the equalizer on the foundation.
8. Reinstall the clevis pins and locking pins in the equalizer
holes.
CAUTION
Avoid Mast Stop Damage
Do not raise the mast stops until the live mast has been
raised to 150° maximum. Otherwise, the mast stops will
hit the live mast possibly resulting in damage.
CAUTION
Avoid Mast Stop Damage
Do not pin the mast stop strut to the lower holes in the
bracket (4). Otherwise, the mast stops will not properly
engage the mast stop pins (View D, Figure 4-64 on
page 4-74). Structural damage will occur.
CAUTION
Avoid Wire Rope Damage
Remove the rope guard (6) before removing the equalizer
(5) from the mast top.
Do not reinstall the rope guard until after the mast top has
been raised approximately 3 m (10 ft) off the ground later
in this procedure.
The wire rope can be damaged if these steps are not
taken.
FIGURE 4-58
Item Description
1 SL 4 Sling (qty 4) – 3,80 m (12.50 ft),
11 340 kg (25,000 lb)
2 Lifting Lug (qty 4)
3 Locking Pin (qty 2)
4 Clevis Pin (qty 2)
5 Equalizer
6 Rope Guard with Cotter Pins
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