Manitowoc 999 User Manual

Reference Only
SETUP AND INSTALLATION 999 LUFFING JIB OPERATOR MANUAL
4-2
Published 05-15-17, Control # 043-09
COUNTERWEIGHT REQUIREMENT
See applicable Luffing Jib Capacity Charts and Raising
Procedure Charts for counterweight requirements when
operating with jib.
BLOCKED CRAWLERS
To prevent crane from tipping or structural damage to
attachment, all boom and jib combinations must be
raised and lowered over blocked crawlers. See Luffing Jib
Capacity Charts and Raising Procedure Charts for blocked
crawler requirements. Also see Crawler Blocking Diagram in
Luffing Jib Capacity Chart Manual for instructions.
RIGGING DRAWINGS
See the end of this section for applicable luffing jib and fixed
jib rigging drawings.
The boom and jib components (butts, inserts, tops,
pendants, straps) must be assembled in the proper
sequence according to the rigging drawings.
Two tables are provided on the luffing jib rigging drawing:
one table lists the boom sections and backstay pendants
required for various boom lengths. The other table lists the
boom sections required for various jib lengths. Make sure the
proper table is referred to. Read and comply with insert and
pendant notes on the rigging drawing.
The boom and jib straps are stored on the boom and jib
sections for shipping. There is no means provided for storing
the backstay pendants on the boom sections. It is the
owner’s responsibility to coil and safely store the pendants
for shipping.
LUFFING JIB RAISING PROCEDURE
See the end of this section for applicable luffing jib raising
(and lowering) procedures.
IDENTIFYING BOOM/JIB COMPONENTS
Boom and jib sections are marked for proper identification as
shown in Views A and B, Figure 4-1
.
Boom and jib pendants are marked for proper identification
as shown in View C, Figure 4-1
.
Boom straps and links are marked for proper identification as
shown in View D, Figure 4-1
.
NOTE: The markings shown in Figure 4-1
can vary
depending on when your crane was produced and
the original equipment manufacturer.
HANDLING COMPONENTS
Handle boom and jib components with care to avoid
damaging lacings and chords. Lift against chords only, never
against lacings.
Nylon slings should be used to handle components. If wire
rope or chain slings are used, protective covering (such as
sections of rubber tire) must be used between the slings and
the component.
RETAINING CONNECTING PINS
Connecting pins are retained in various ways:
• Snap pins
• Quick-release pins
• Cotter pins
• Keeper plates with cap screws and lock washers
Do not operate crane until all connecting pins are
installed and properly retained.
PIN AND CONNECTING HOLE
CLEANLINESS
To prevent dirt from damaging closely machined surfaces of
pins and connecting holes, perform the following tasks each
time the pins are installed:
• Thoroughly clean all pins and connecting holes.
• Apply a light coat of grease to all pins, contacting
surfaces, and connecting holes.
SHIPPING CRANE COMPONENTS
It is the owner/user’s responsibility to ensure the following:
• That all trailer loads comply with local, state, and federal
transportation requirements
• That all crane components are properly blocked and
secured so they cannot shift or fall off trailers
• To avoid damage to components:
WARNING
Tipping Hazard!
Prevent crane from tipping. Do not operate crane until
proper counterweight is installed.
DANGER
Tipping Hazard!
Prevent crane from tipping or structural damage to
attachment. Do not attempt to raise or lower boom and jib
from or to ground until crawlers are blocked.

Manitowoc 999 Specifications

General

Brand	Manitowoc
Model	999
Category	Construction Equipment
Language	English