Manitowoc 999 User Manual

Reference Only
Manitowoc Published 05-15-17, Control # 043-09 4-49
999 LUFFING JIB OPERATOR MANUAL SETUP AND INSTALLATION
4
Raising Boom and Jib
NOTE: Circled numbers in Figure 4-25 and Figure 4-26
correspond to numbered steps in the following
procedure.
1. Raise boom and luffing jib to jack-knife angle called for
in Luffing Jib Raising Procedure.
2. If fixed jib point is already installed, fixed jib rollers will
roll along ground as boom and luffing jib are raised.
3. If fixed jib point is not installed, install after boom and
luffing jib have been positioned at specified angle.
4. Once boom and luffing jib have been raised to specified
angle, slowly haul in luffing hoist wire rope until luffing jib
pendants start to go into tension and stop. Do not
attempt to lift luffing jib at this time or crane will tip.
5. Connect fixed jib backstay pendants (View B):
a. Using an assist crane, raise fixed jib strut and pin
backstay pendants (P4) to links.
b. Lower strut until it is supported by backstay
pendants and disconnect assist crane.
6. Connect jib stop assembly as follows:
a. Remove connecting pins (1, View C) from outer
tube (2).
b. Support outer tube (2) with slings from assist crane
and remove pins (3, View C) connecting outer tube
to jib strut.
c. Remove pins (4, View C).
d. Lower outer tube (2) with assist crane and rotate
links (5, View E) by hand until connecting holes line
up.
e. Install pins (1, View E).
f. Store pins (3) in lugs on outer tube (Figure 4-25
,
View D).
NOTE: Depending on your boom and jib length, step 6g
may not be possible. If this is the case, perform
step 6g
after the fixed jib roller is raised just clear of
the ground.
g. If possible, lower outer tube (2) until hole in link (5,
View F) lines up with hole in luffing jib top and install
pins (4).
h. Remove pins (6, View F) from inner links (7).
i. Slide inner links into outer link (2) until holes in inner
links line up with third hole in links (8). Install pins (6,
View F).
j. Using hand winch on jib top, haul in jib stop control
cable enough to tension jib stop pins so that safety
pins (Figure 4-24
, View B) can be removed.
k. Remove safety pins from jib stop pins (Figure 4-24
,
View B) and store pins in lugs on outer tube
(Figure 4-25
, View D).
l. Pay out control cable until cable is loose. Cable
should be resting on bottom lacings in jib sections.
Pins will not engage if cable is not slack.
NOTE: The jib stop pins will engage automatically when
the jib is raised.
WARNING
Tipping Hazard!
Crane can tip if boom and luffing jib are not at specified
angle when boom is raised with fixed jib attached.

Manitowoc 999 Specifications

General

Brand	Manitowoc
Model	999
Category	Construction Equipment
Language	English