Manitowoc 999 User Manual

Reference Only
Manitowoc Published 05-15-17, Control # 043-09 4-19
999 LUFFING JIB OPERATOR MANUAL SETUP AND INSTALLATION
4
Raising Boom and Jib
General
As defined in the Raising Procedure Chart, one of two
methods can be used to raise the boom and jib depending on
the boom and jib combination: IN-LINE METHOD or JACK-
KNIFE METHOD.
The luffing jib can also be raised and lowered using
Assemble-In-Air Raising Procedure. (see Assemble-In-Air
Raising Procedure topic in this section).
See the Luffing Jib Raising Procedure to determine which
method can be used.
Preliminary Raising Procedure
See Figure 4-10 for the following procedure.
1. Using hand winch on left side of jib top, slacken jib stop
control cable until it rests on bottom lacings in jib.
Jib stop inner strut will not extend properly and pins
will not engage if control cable is tight.
2. Slowly boom up until ends of jib stop inner strut are
2 – 4 ft (0,6 – 1,2 m) off ground.
3. Pin jib stop pendants to jib stop inner strut (View B).
4. Stand to side of jib stop strut and remove quick-
release pin from both sides of inner strut (View B).
Inner strut will extend slightly when this step is
performed.
5. Store quick-release pins in storage holes on outer strut
(View C).
6. Monitor boom to jib angle on digital display while
performing step 7
.
7. Slowly boom up until jib stop inner strut is fully extended
(View C). Boom to jib angle will be approximately 168°.
Jib stop strut pins should engage automatically when
inner strut is fully extended (View C). Do not raise
boom any higher until both pins are engaged.
NOTE: Outer ends of jib stop strut pins are painted white
(or other contrasting color) to make pins more
visible from ground.
8. Check that jib stop control cable is slack: pay out cable
until it rests on bottom lacings in boom. Jib stop control
cable must be slack at all times during luffing jib
operation. Otherwise, pins may disengage or cable
may break.
WARNING
Falling Boom And Jib Hazard!
Select and confirm LUFFING JIB mode. Operating in any
other mode with luffing jib attached is prohibited.
Luffing jib limits are disabled when LUFFING JIB mode is
off. Boom and jib could be pulled over backwards.
DANGER
Moving Part Hazard!
Warn all personnel to stand clear of jib point rollers while
raising boom and jib.
Death or severe crushing injuries will occur if personnel
come into contact with rollers.

Manitowoc 999 Specifications

General

Brand	Manitowoc
Model	999
Category	Construction Equipment
Language	English