Manitowoc Published 08-12-19, Control # 224-13_v2 4-49
MLC650 OPERATOR MANUAL SET-UP AND INSTALLATION
Deploy the Self-Erect Cylinder
See Figure 4-39 for the following procedure:
1. Raise the live mast to 85° (7).
2. Slightly extend the self-erect cylinder (1) enough to allow
the pin (4) to disengage from the retention bracket (6)
below the cylinder.
NOTE: As the mast passes 90°, the self-erect cylinder (1)
will begin to sway away from the mast.
The mast straps will also sway away from the mast
after the mast passes 90°.
3. Continue booming down and fully extend the self-erect
cylinder (1) to attach the self-erect rigging or to connect
the boom straps.
NOTE: The mast raising cylinders will automatically stop
when they are fully extended.
Use the Mast as a Boom
Proceed to use the mast as a boom and the self-erect
cylinder as a hoist for the remainder of the self-erect
procedure.
See Liftcrane Mast Handling Capacities Chart at the end
of this section for detailed lifting capacities.
NOTE: The following will occur if the mast is lowered to
158° (8):
• The mast will stop lowering.
• The hazard warning buzzer will come on.
• The hazard warning symbol and MAST TOO
FAR FORWARD icon will appear in the system
fault bar on the information screen.
DANGER
Falling Load Hazard!
Prevent structural failure of components or tipping:
• Do not exceed the lifting capacities given in the
Liftcrane Mast Handling Capacities Chart at the end
of this section.
Mast Damage Hazard!
Prevent mast damage:
• Do not use the limit bypass switch to lower the mast
below 158° or mast damage will occur.
Falling Mast Hazard!
Prevent the mast from falling over backwards:
• Do not lower the mast-assist arms until after the mast
links are connected to boom straps.
Self-Erect Cylinder Damage Hazard!
Prevent self-erect cylinder damage:
• Do not lower the rod end into the ground or cylinder
damage will occur.
MAST TOO FAR
FORWARD ICON
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