Manitowoc Published 12-10-19, Control # 258-05 4-29
MLC90A-1/MLC100-1 OPERATOR MANUAL SETUP AND INSTALLATION
Install Crane Counterweight (continued)
Use the remote control for the remaining steps. This will
allow the installer to stand at the rear of the crane and view
the installation procedure.
• Use the Drum 4 (boom hoist) thumbwheel on the remote
control to raise and lower the gantry.
• Turn ON the SYNC switch on the remote control so the
gantry raising cylinders follow the gantry as it is raised
and lowered during the following steps. See Section 3 of
the Operator Manual for detailed instructions.
See Figure 4-17
.
5. Remove the pins from the handling pendants (2, View
A).
6. Lower the gantry (boom down using the Drum 4
thumbwheel on the remote control) until the handling
pendants (2, View A) can be pinned to the handling links
(3).
At this point:
• The gantry will be at approximately 31°.
• The handling links (3) will be centered over the
crane counterweight (1).
• The crane will be at the approximate dimension
given in View A.
7. Install the handling pins (4, View A).
8. Slowly raise the gantry (boom up using the Drum 4
thumbwheel on the remote control) until the crane
counterweight is about to leave the ground. The tray
should hang approximately 2° out of level (View B) —
front of tray higher than rear of tray.
9. If needed, the angle can be adjusted slightly by
changing which holes the handling pendants are pinned
to in the adjustable handling links (5, View C).
The rear handling pendants (2, View C) can be made
longer (increase lifting angle) or shorter (decrease lifting
angle) by pinning the pendants to the corresponding
holes in the links. Be sure to pin both pendants to the
same holes, or the crane counterweight will lift out of
level from side to side.
10. It is normal for the counterweight to lift slightly out of
level to the right.
Continued on next page.
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