Manitowoc Published 04-06-18, Control # 231-14 4-91
MLC650 VPC-MAX™ OPERATOR MANUAL SET-UP AND INSTALLATION
TO TURN RIGGING WINCH OFF —
1. Scroll to the rigging winch selection screen (5) in the
main display. See MLC650 Main Display Operation
Manual for instructions.
2. Use either the jog dial on the right console or the scroll
keys on the main display to highlight the OFF (O) icon
(7) in the selection box.
3. Press the select button on the jog dial or on the main
display to select the highlighted mode. The screen
changes to reflect the change.
Operating Rigging Winch
Free-Spool Operation
The winch has a free-spool clutch which allows the drum
barrel to be disengaged from the drive mechanism. This
position allows the drum to turn by hand.
TO TURN FREE-SPOOL OFF engage the lever (4A).
TO TURN FREE-SPOOL ON disengage the lever (4B)
Power Operation
1. Engage the lever to turn the free-spool off.
2. Turn on the rigging winch mode.
3. To ensure the winch gears are properly engaged,
proceed as follows:
a. Push the Drum 0 control handle forward to slowly
rotate the winch drum 90° in the pay out direction.
b. Pull the Drum 0 control handle back to slowly rotate
the winch drum 90° in the haul in direction.
4. Pay out the rigging line by moving the Drum 0 control
handle forward.
5. Reeve the rigging line through the load block and the
boom point and connect it to the desired load line as
shown in the Rigging Winch Assembly drawing at end of
this section.
6. Move the Drum 0 control handle to off and push the
corresponding load drum control handle forward to pay
out the load line. The rigging winch will haul in the
rigging line automatically.
NOTE: Use the engine throttle to increase and decrease
rigging winch line pull and to control line slack at
the rigging winch.
The stall line pull of the rigging winch is regulated
with a proportional relief valve controlled by the
crane’s programmable controller.
7. Once the load line is reeved through the load block and
the boom point:
a. Move the load drum control handle to off.
b. Pay out the rigging line to slacken the load line by
pushing the Drum 0 handle forward.
c. Disconnect the rigging line from the load line.
d. Haul in the rigging line for storage on the rigging
winch by pulling the Drum 0 control handle back.
e. Secure the end of the rigging line to the boom butt
for storage.
f. Turn OFF the rigging winch mode.
g. Connect the load line to the dead-end socket. See
instructions in this section.
CAUTION
Avoid Rigging Winch or Wire Rope Damage!
The rigging winch will not automatically pay out line if the
selected load drum control handle is pulled back to the
hoist position.
Structural damage to the winch or rigging line will occur!
If it is necessary to haul in the load line on the load drum
when the load line is connected to the rigging line,
proceed as follows:
• Pay out the rigging line with the Drum 0 control
handle while hauling in the load line with the load
drum control handle.
WARNING
Flying Object Hazard!
Do not attempt to disconnect the rigging line from the load
line until the lines are slack.
The lines could fly apart with explosive force and strike
personnel.
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