Manitowoc Published 12-10-19, Control # 258-05 4-77
MLC90A-1/MLC100-1 OPERATOR MANUAL SETUP AND INSTALLATION
Remove Carbody Counterweight
For Series 1, disregard this procedure.
NOTE The following procedure uses the boom butt.
To provide sufficient clearance if you use an assist
crane:
• Swing the upperworks perpendicular to the
crawlers so the operator cab is on the same side
of the carbody that the counterweight is being
removed from.
If equipped with Series 2 counterweight, remove the crane
counterweight (page 4-73
), BEFORE removing the
carbody counterweight.
For Series 2, proceed as follows:
1. Attach the chain lifting sling (1, View A) to the hook-and-
weight ball (2).
2. Raise the boom butt to approximately 80°.
3. Pay out the load line from Drum 1 and reposition the
load line behind the counterweight handling sheave (5,
View B). You can stand on the right side platform to
perform this step.
4. Hook onto the carbody counterweight (3, View D) with
the chain lifting sling (1).
5. Swing and raise the boom butt so the hook and weight-
ball is centered over the counterweight (View C).
6. Remove the pins (6, View D).
7. Hoist as required to disengage the cutouts in the
carbody counterweight (3, View D) from the hooked lugs
(7) on the carbody.
8. Lower the boom butt to no lower than 64°.
9. Pay out the load line to lower the counterweight onto the
ground.
10. Store the pins (6, View D) in the hooked lugs (7) on the
carbody.
11. Slacken the chain lifting slings and disconnect them
from the carbody counterweight.
12. Repeat the steps for the other carbody counterweight.
13. Disengage the load line from behind the counterweight
handling sheave (5, View B) and allow the load line to
hang vertically from the boom butt (View A).
14. You can now use the to move the carbody
counterweights to the desired storage/shipping location.
Disassemble Jib and Boom
The jib and boom can be disassembled with this crane’s
boom butt or with an assist crane.
The boom and jib can be disassembled with this crane either
before or after the crane counterweight is installed, at the
crane users discretion. The will be much easier to maneuver
without crane counterweight.
• See Boom #290 Disassembly on page 4-84
.
• See Jib #117 Disassembly on page 4-85
.
CAUTION
Avoid Boom Butt Damage!
Do not lower the boom butt below 64° while handling the
counterweight from the handling sheave. Do not allow the
load line to contact the sheave indicator (5A, View E).
Overload damage to the sheave and boom butt can
occur.
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