(2)
Manitowoc Engineering Co.
DETAILS OF THE 123 JIB ASSEMBLY
JIB BACKSTAY
JIB INSERT PENDANTS
(2 ea., added Here
for each Jib Insert Used)
• JIB
BACKSTAVS,
Pendant Type
---BOOM
"PENDANT TYPE
JIB STOPS
THE 123 JIB ASSEMBLY
JIB OFFSET
IN FEET
( See Fig. 1112-8
. I
JIB
PENDANT
BOOM TOP CENTERLII~E ....
1
JIB OFFSET ANGLE
20 DEGREES (MAX.)
SHOWN I
FIG. 1112-2
J
GENERAl"
The following is a guide |or assembling the 123 Jib, and
installing it on Boom Tops.' Engineering Drawings are
available and should be used during initial assembly.
CAPACITY: - Consult the specific Jib Uft Capacity Charts
for
your machine.
The 123 Jib Assembly is mounted on Boom Tops to give
additional Boom reach. It may be used as a straight ex-
tension, (0 degree Offset), or it may be offset from the
centerline of the Boom Top by 10, or 20 degrees, to help
reach over the edge of a structure.
USE ON BOOMS:
The following Manitowoc Booms can mount the 123 Jib
Assembly with Pendant-type Backstay assemblies, now
furnished as standard equipment:
8
9-9A
9A 3 Ft. Hammerhead
17
22-22A Light Tapered Top
22-22A Open Throat
22- 22A Hammerhead
17 with 4 degree Offset Top
22-22A with 4~ degree Offset Top
9-9A with 4~ ° Offset Top
Consult the factory about mounting Jibs on other Booms
in the field, giving location of Jib Backstay Anchor Lugs
on Insert, and hole diameters in Anchor Lugs.
DESCRIPTION:
The 123 Jib is of tubular construction, and consists of a
15 ft. Jib Butt, and a 15 ft. Top, giving a basic length
of 30 ft.
.Component parts are pinned together. Inserts, 10 ft.
long, are available to pin between the Butt and Top
to make up lengths of 40 ft., 50 ft., or 60 ft., (max.)Jib
lengths.
Rigging consists of a Strut, Jib Pendants, Jib Backstays,
Jib Stop Pendants (or links) and Jib Inserts. Adaptors, Links
and other parts required for a particular installation may
be found in the Parts and Service Manuals. Various refer-
ences are made to them in the following text and
illustrations.
Jib Offsets, in degrees, as referred to in the Capacity
Charts, are set by changing the lengths of the Backstays.
CAUTION: THE 123 JIB IS DESIGNED TO BE USED AT
A MAXIMUM OFFSET OF 20 DEGREES WITH
THE BOOM TOP CENTERLINE. DO NOT
EXCEEDI
FOLIO 730-2 123 JIB REV. 4/'24/73
395143
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