Manitowoc Published 05-15-17, Control # 043-09 4-15
999 LUFFING JIB OPERATOR MANUAL SETUP AND INSTALLATION
Raise Main Strut/Connect Backstay Pendants
(continued)
Unless otherwise specified, see Figure 4-8 for the remaining
steps.
16. Unpin wedge socket from strut handling pendant and
link (Figure 4-7
, View A) and pin strut handling pendant
and link to left side main strut pendant (Figure 4-7
, View
C).
17. Remove wedge socket from front drum load line.
18. Pin main strut pendants (1) to basic backstay pendants
on boom top (2, View C).
19. Leave quick-release pins (4, View B) in erecting holes
and remove stop pins (5) from middle stop tubes (7).
20. Slowly haul in luffing hoist wire rope to raise main strut to
operating position.
21. Continue to haul in luffing hoist wire rope until holes in
middle stop tubes (7, View D) line up with upper holes in
lower stop tubes (6).
22. Install stop pins (5, View E).
23. Remove quick-release pins (4, View E) from erecting
holes and install them in storage holes.
Disconnect Jib Strut from Jib Butt
See Figure 4-8, View G for the following procedure.
1. Luff up or down as required to loosen pins (9) in strut
supports (10).
2. Remove pins (9).
3. Store pins in strut supports.
4. Luff up until jib straps on insert next to jib butt are
clear of strap brackets (jib strut at approximately 60°).
Install Load Lines
If required, remove lower boom point sheaves. See
Luffing Jib Raising Procedure for sheave removal
requirements.
Depending on your lifting requirements, the luffing jib can be
operated with load lines from the following locations:
• Lower Boom Point
• Intermediate Fall
• Lower Luffing Jib Point
• Upper Luffing Jib Point
• Fixed Jib Point
1. See Capacity Charts for lifting limitations and required
deducts when handling loads from selected locations.
2. See Wire Rope Specifications to determine parts of line
required for your job and size load block accordingly.
3. Route load line from desired drum through proper guide
sheaves on boom (see Load Line Reeving in this
section).
Be sure to route load line from front drum over top
of lower guide sheave on boom butt (see Figure 4-6
).
4. If jib will be raised using In-Line Method, install load
block or weight ball from jib points before boom and jib
are raised.
5. If jib will be raised using Jack-Knife Method, proceed as
follows:
a. Reeve load line through guide sheaves in jib point.
b. Pull load line approximately 20 ft (6,1 m) past end of
jib and lay line on ground.
c. Securely tie off load line to jib. Install load block or
weight ball after boom and jib have been jack-knifed
into position just prior to raising jib point rollers off
ground.
Connect Electric Cords/Adjust Electronic Devices
1. Connect electric cords from following components to
respective junction boxes on boom and jib points. See
Boom Wiring Drawing at the end of this section:
• Jib Stop Limit Switches
• Block-Up Limit Switches
• Load Sensor Sheaves
• Install shorting plugs on all unused connectors on
junction boxes.
2. Adjust electronic devices. See appropriate instructions
in Section 6:
• Jib Stops Limit Switches
• Block-Up Limit Switches
• Boom Stop Limit Switch (set to proper angle after
boom and jib are raised)
CAUTION
Jib Strut Damage!
Do not allow jib strut to come into contact with boom top
when luffing up. Jib strut damage could occur.
WARNING
Run-Away Wire Rope!
For long boom and short jib combinations, wire rope on
boom side of attachment can overhaul unsecured wire
rope on jib side. This could cause personnel injuries and
damage to equipment. Securely tie off load lines to jib
before raising attachment.
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