Manitowoc 999 User Manual

Reference Only
Manitowoc Published 05-15-17, Control # 043-09 3-5
999 LUFFING JIB OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
3
LUFFING JIB OPERATING CONTROLS
See for Location of Controls.
The instructions in this section supplement the operating
control instructions in the Crane Operator Manual. This
section has two purposes:
• To familiarize qualified operators with the location of the
controls used for luffing jib operation.
• To alert operators to important safety information.
1 – Rated Capacity Indicator/Limiter (RCL)
Displays load lifting information and alerts the operator to
overload conditions.
See separate RCL Manual for operating instructions.
2 – Crane Mode Selector
See the Crane Operator Manual for detailed instructions on
selecting and confirming the crane mode.
Use this control to select and confirm the LUFFING JIB
mode.
Once selected and confirmed, the mode appears on the
digital display as shown in .
Also use this control on crane S/N 9991326 and newer to
select and confirm the LUFFING JIB SETUP mode.
Once selected and confirmed, the mode appears on the
digital display as shown in .
Use the LUFFING JIB SETUP mode during luffing jib
assembly and disassembly to bypass the limits identified in
Table 3-3.
See the Crane Operator Manual for detailed instructions on
selecting and confirming the crane mode.
3 – Digital Display
Displays boom angle, luffing jib angle, and boom to luffing jib
angle. See for identification of each angle:
• BOOM ANGLE — angle between centerline of boom
and horizontal. Monitor this angle when raising boom to
operating position.
• LUFFING JIB ANGLE — angle between centerline of jib
and horizontal. Monitor this angle when raising and
lowering jib during operation.
• BOOM TO LUFFING JIB ANGLE — angle between
centerline of boom and centerline of jib. Monitor this
angle when raising boom and jib from ground and
lowering boom and jib to ground.
The digital display also displays system faults and operating
limits for the luffing hoist and all other crane functions. See
Digital Display Readings in the Crane Operator Manual for a
complete list of operating conditions, system faults, and
operating limits.
WARNING
Prevent death or serious injury to personnel!
Luffing jib attachment must be installed and operated
by experienced personnel trained in erection and
operation of construction cranes. These personnel
shall read, understand, and comply with instructions in
this manual, in Crane Operator Manual, and in Luffing
Jib Rigging drawings and Capacity Charts.
FIGURE 3-2
Luffing Jib
Mode
CRANE MODE
LUFFING JIB
FIGURE 3-3
Luffing Jib
Setup Mode
CRANE MODE
LUFFING JIB SETUP
FIGURE 3-4
Boom
Angle
Horizontal
C
L
Boom
A886
Boom to
Jib Angle
Horizontal
C
L
Jib
Jib
Angle

Manitowoc 999 Specifications

General

Brand	Manitowoc
Model	999
Category	Construction Equipment
Language	English