Manitowoc 2250 User Manual

Reference Only
Manitowoc Published 06-24-16, Control # 241-01 4-83
2250 OPERATOR MANUAL SETUP AND INSTALLATION
4
Boom Removal
Lower Boom
Prepare the crane and the boom as follows.
1. Position the crane in the disassembly area.
2. If required per capacity chart, travel the crawler front
rollers or rear tumblers onto blocking or extend the
outriggers and level the carrier.
NOTE: See Crawler Blocking Diagram in the Capacity
Chart Manual for blocking requirements.
3. Lower the boom and jib (if equipped) onto blocking at
ground level.
a. If equipped with a jib, disconnect the jib stop
pendants before the jib point contacts the ground, or
damage will result.
b. If equipped with an upper boom point, remove the
lower connecting pins (10, Figure 4-43
, View C)
from the holes (B) before the boom point contacts
the ground, or damage will result.
c. As the boom nears the ground, place blocking at
least 152 mm (6 in) high under the bottom chords at
the connecting pins between the boom top and first
insert or between the transition insert and the
adjacent insert.
Remove Block-Up Limit Control
See Figure 4-12 for the following procedure.
1. Disconnect the boom electrical cord from the cable reel
on the boom butt and connect the cord to the junction
box on the rotating bed (see View C).
2. Remove the block-up limit assembly and spool the
electrical cord onto the reel on the boom butt.
Remove Load Block and Weight Ball
Disconnect the load lines from the load block and weight ball
and spool the load lines onto the load drums.
Disconnect Straps and Pendants from Equalizer
See Figure 4-45 for the following procedure.
1. Slacken the boom hoist wire rope so the equalizer is
resting on the boom butt rails.
2. Attach a tagline to the lug on the front of the equalizer
(see View C). The tagline is required to pull the equalizer
forward when disconnecting the links from the equalizer.
One of three methods can be used:
• Chain the sling from another crane—Route the
chain sling around the bottom of the center sheave
in the boom butt wire rope guide.
• Load line load drum—Route the load line over the
top and around the bottom of the center sheave in
the boom butt wire rope guide. Connect to the
equalizer lug with a socket and wedge.
• Lever-operated hoist
3. Pull the equalizer forward with the tagline just enough to
loosen the connecting pins (5, View D).
4. Install the stop pins (4, View D) in the equalizer rail holes
closest to the end of the equalizer.
NOTE: Stop pins must be installed to prevent the equalizer
from accidentally sliding back on the rails during
link disassembly.
5. Disassemble links (L1 or L2, View D) and, if equipped,
links (L4 or L5, View E) from the equalizer.
6. Store pins (5, View D) with spacers (8) in the equalizer
holes.
7. Install strap storage pins in the storage holes under the
straps next to the boom butt (Figure 4-44
, View B). This
step is required to support the straps when the boom
butt is disconnected from the boom.
See Figure 4-45
for the remaining procedure.
8. Disassemble the links (L2 or L3, View B) from the boom
straps. Store connecting pins (2) in the strap holes.
9. Position links (L1 or L2, View A), straps (S2 or S3), and
links (L2 or L3) on the boom butt wire rope guide and
install the strap storage pins (1) as shown.
10. While holding the equalizer with the tagline, remove the
stop pins (4, View D) from the holes in the rails and store
them in holders on the side of rails.
11. Slacken the tagline until the boom handling holes in the
equalizer are in line with the holes (A, View D) in the
equalizer rails.
12. Remove the connecting pins (3, View D) from the
storage holders and install the pins in the holes (A) to
secure the equalizer to the rails.
13. Slacken the tagline and disconnect it from the equalizer.
DANGER
Tipping Hazard!
Prevent the crane from tipping to avoid death or injury:
• For crawler cranes, do not attempt to raise or lower
the boom and jib from the ground or to the ground
until the ends of the crawlers are blocked, if required.
• For truck cranes, do not attempt to raise or lower the
boom and jib from the ground, to the ground, or over
the rear of the carrier until the outriggers are fully
extended and the carrier is level.

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English