Only
Manitowoc
Published 01-08-13, Control # 049-05
4-69
2250 MAX-ER 2000 OPERATOR’S MANUAL
SET-UP AND INSTALLATION
4
Raise Jib Strut
1.
Determine pendants and links required for jib offset (2, 3,
4, Figure 4-33, View B).
2.
Pin pendants and links to backstay links.
NOTE:
Backstay links (3, Figure 4-33, View B), if used,
must be adjacent to connecting links (4).
3.
Using assist crane or fork-lift truck, lift jib point
approximately 3 ft (0,9 m) off ground and block
(Figure 4-33, View A).
Raising jib point provides enough slack to allow pinning
backstay pendants.
4.
Using appropriate slings, attach hook from assist crane
to top of jib strut (Figure 4-33, View A).
5.
Slowly lift jib strut over center with assist crane. Use
extreme caution not to side load strut while lifting.
6.
Pin jib backstay pendants (1) to links or pendants (2 or 3)
previously pinned to boom backstay links (Figure 4-33,
View B).
7.
Remove blocking from jib point and lower to ground.
Connect Jib Stop
1.
Slowly raise boom until jib is supported by backstay and
jib pendants.
2.
Proceed as follows depending on jib offset. See
Figure 4-32, Views D and E),:
a.
5
°
– Pin pendants (6) to holes in adjusting links (7)
which give least pendant slack or some preload.
b.
15
°
and 30
°
– Pin pendants (6) directly to boom top
lugs.
Finish Assembling Jib
Perform the following final assembly steps as outlined earlier
in this section prior to raising boom and jib:
•
Install load lines.
•
Install block-up limit control system.
•
Make necessary adjustments.
•
Perform pre-raising checks.
JIB REMOVAL
Lower Boom and Jib
1.
Lower boom until jib point is approximately 1 ft (0,3 m)
from contacting ground.
2.
Disconnect jib stop pendants (6, Figure 4-32, View D)
from adjusting links (7) or from boom top lugs.
3.
Lower boom and jib onto blocking at ground level.
4.
Disconnect block-up limit electric cord from jib at cord in
boom point and at junction box in jib point, and store
cable on jib butt.
Connect block-up limit electric cable to jib to shorting
plug on junction box in boom top.
5.
Remove load line and block-up limit chains and weights
from jib.
Lower Jib Strut
1.
Using assist crane or fork-lift truck, lift jib point
appr oximately 3 ft (0,9 m) off ground and block
(Figure 4-33, View A).
Raising jib point provides enough slack to allow
removing backstay pendant pins.
2.
Using appropriate slings, attach hook from assist crane
to top of jib strut (Figure 4-33, View A).
WARNING
Collapsing Jib Hazard!
To prevent death or serious injury, do not stand on, inside,
or under jib during disassembly. Always stand on outside
of jib when removing connecting pins.
Support jib properly before removing pins. Block sections
at connection points.
CAUTION
Jib Stop Damage!
Do not allow jib point to touch ground until jib stop
pendants are disconnected.
WARNING
Falling Strut Hazard!
Do not disconnect backstay pendants until strut is
supported and pendants are slack.
