Manitowoc 999 User Manual

Reference Only
SETUP AND INSTALLATION 999 LUFFING JIB OPERATOR MANUAL
4-36
Published 05-15-17, Control # 043-09
Raise Boom
See Figure 4-19 for the following procedure.
1. With the exception of the hand winch step, perform the
Preliminary Raising Procedure to connect the jib stop
pendants and to fully extend jib stop
2. Slowly raise boom until inner strut is fully extended and
strut pins are fully engaged as shown in View B
(approximately 168° boom to luffing jib angle).
3. Slowly BOOM UP to minimum BOOM ANGLE given in
Jib Luffing Assembly, Assemble-In-Air Drawing (View
D). Monitor boom angle on digital display.
LUFF UP as needed to keep luffing jib strut off luffing jib.
4. With boom at minimum boom angle, lower jib with assist
crane until jib rollers touch ground and lifting slings are
slack.
5. Disengage swing lock and release swing brake.
6. Disconnect lifting slings from assist crane at jib insert.
FIGURE 4-19
Maintain
1 - 2 ft (0,3 - 0,6 m)
Clearance
Item Description
1 Outer Stop Strut
2 Inner Stop Strut
3 Jib Stop Pendant 24 ft 1 in (7,3 m)
4 Connecting Pin with Cotter Pin
5 Jib Stop Pendant 9 ft 6-1/2 in (2,9 m)
6 Quick-Release Pin
A1228
View D
Lift with Assist
Crane (typical)
Minimum Angle from Assemble-In-
Air Raising Procedure Drawing
A1228
View A
Lift with Assist
Crane (typical)
Retracted
Installed
Pin Storage
Hole
Fully
Extended
Strut Pins
Engaged
Stored
A1204
View B
View C
1
2
3
4
5
6
2
6
CAUTION
Structural Damage Hazard!
To prevent structural damage to crane or attachment
while raising boom:
• Jib rollers must not touch ground. Maintain at least 1 -
2 ft (0,3 - 0,6 m) clearance while raising boom.
• Travel assist crane in reverse and hoist as needed to
maintain required clearance between jib rollers and
ground. Do not side load jib.

Manitowoc 999 Specifications

General

Brand	Manitowoc
Model	999
Category	Construction Equipment
Language	English