Manitowoc Published 04-06-18, Control # 231-14 4-123
MLC650 VPC-MAXâ„¢ OPERATOR MANUAL SET-UP AND INSTALLATION
Positioning the Live Mast
Position the live mast at a minimum angle of 111.6° for the
remainder of the procedures.
Removing the Counterweight Boxes
Remove the counterweight boxes using an assist crane.
• The counterweight tray weighs 20 000 kg (44,000 lb)
• Each counterweight box weighs 10 000 kg (22,000 lb)
NOTE: One or two counterweight boxes can be lifted at a
time.
See Figure 4-103
for the following procedure.
1. If not already done, drive the counterweight tray to the
minimum working position of 4.00 m as indicted in the
VPC-MAX calibration screen (View C, Figure 4-38 on
page 4-40).
2. Loosen the turnbuckles until the counterweight chain
assemblies are loose enough to remove.
NOTE: The ratchet on the turnbuckle must be flipped in
one direction to tighten the turnbuckle and in the
opposite direction to loosen the turnbuckle.
3. Remove the counterweight chain assemblies from the
turnbuckle (7) hooks.
4. Remove the counterweight chain assemblies (2) from
the counterweight lifting lugs and the counterweight tray
lugs (6).
5. Attach the two SL 4 slings (3) to the assist crane and
around the lugs on one counterweight box.
6. Boom, swing, and hoist as necessary to remove the box
from the crane.
7. Remove the slings from the box.
8. Attach the slings around the lifting lugs on two
counterweight boxes on the opposite side of the
counterweight tray.
9. Boom, swing, and hoist as necessary to remove the
boxes from the crane.
10. Remove the slings from the boxes.
11. Continue to remove two boxes, alternating from side to
side.
12. Remove the last box from the crane.
13. Place the chain assemblies in the storage pockets on
the counterweight tray.
Placing the Counterweight Boxes on the
Trailer
NOTE: One or two counterweight boxes can be lifted at a
time.
1. Use two SL 4 slings – 3,80 m (12.50 ft), 11 340 kg
(25,000 lb) – to lift the counterweight box(es) from the
counterweight tray or the disassembly area.
2. Move the trailer into place.
3. Place the box(es) on the trailer.
4. Disconnect the slings from the box(es).
5. Repeat step 1
through step 4 for all of the boxes.
WARNING
Crushing Hazard!
To prevent the crane from tipping and the counterweight
boxes from falling off the tray during assembly/
disassembly, do not remove (or install) the boxes until the
counterweight tray is at the minimum working position.
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.
WARNING
Crushing Hazard!
Do not lift more than two counterweight boxes at a time.
The lifting lugs may break, resulting in the boxes falling.
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