Manitowoc MLC300 User Manual

Manitowoc Published 11-20-19, Control # 234-19 4-99
MLC300 OPERATOR MANUAL SETUP AND INSTALLATION
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NOTE For cranes with Serial Number 604716-605836,
605953, and 606114:
• The maximum boom length that can be closed or
opened using the self-erect cylinder is 66 m
(216.5 ft).
• For boom lengths longer than 66 m (216.5 ft), use
the live mast and Manitowoc supplied lifting
slings and shackles to close and open the boom
as instructed in F2293 at the end of this section.
Or, use an assist crane.
For cranes with Serial Number 605952, 606648,
and greater:
• All boom lengths can be closed or opened using
the self-erect cylinder. OR,
• The live mast and Manitowoc supplied lifting
slings and shackles can be used to close and
open the boom as instructed in F2293 at the end
of this section. Or, an assist crane can be used.
Connect Boom Butt to Boom
See Figure 4-69 for the following procedure.
1. Unpin handling pendants (1, View C) from storage on
the boom butt (3).
2. Lower the live mast (4, View A) and extend the self-erect
cylinder (5) as needed.
3. Pin the handling pendants (1, View B) to the lifting link
(6) on the self-erect cylinder (5).
4. Boom up or down so the self-erect cylinder (5) is vertical.
5. Lift the boom butt clear of the ground.
6. Position the crane so the boom butt (3, View E) is in line
with the boom insert.
7. Travel forward slowly, swing, and extend or retract the
cylinder as needed to engage the hooked connectors (7,
View D) on the boom butt with the fixed horizontal pins
(8) on the adjacent insert.
8. Check the appropriate capacity chart to see if the
crawlers need to be blocked to raise the boom. If so,
proceed as follows:
a. Mark the ground at the center of the front crawler
rollers or the drive tumblers (9, View E).
See the Crawler Blocking Diagram in the Capacity
Chart Manual for blocking requirements.
b. Boom down to disengage the hooked connectors (7,
View D) on the boom butt from the fixed horizontal
pins (8) on the adjacent insert.
c. Slowly travel in reverse several feet.
d. Place the required blocking (10, View E) on the
ground at the points marked in step 8a
.
e. Repeat step 7
while traveling onto the blocking.
9. Retract the self-erect cylinder to raise the boom butt until
the bottom connector holes are aligned (View F).
10. Remove the pins (11, View F) from the storage tubes
(12) and install the pins in the bottom connector holes.
11. Extend the self-erect cylinder to slacken the rigging.
12. Disconnect the handling pendants (1, View B) from the
lifting links (6).
13. Pin the handling pendants to the boom butt (View C) for
storage.
CAUTION
Avoid Structural Damage to Mast or Cylinder!
• Do not attempt to raise the boom butt with the mast.
• Use only the self-erect cylinder to raise the boom butt
during the following steps.
WARNING
Tipping Hazard!
Prevent the crane from tipping:
• Block the crawlers — if required per the capacity
chart — before attempting to raise the boom.
WARNING
Crushing Injury Hazard!
Prevent serious crushing injury:
• Do not stand inside the boom sections while installing
the connector pins — STAND OUTSIDE BOOM.

Manitowoc MLC300 Specifications

General

Brand	Manitowoc
Model	MLC300
Category	Construction Equipment
Language	English