Broderson IC-20-1J, Operation And Maintenance Manual

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2-17
OPTIONAL EQUIPMENT
7-FOOT (2.1 m) JIB:
CAPACITY EXAMPLES FOR 7-FOOT (2.1 m) JIB (SEE CAPACITY CHART PAGE 2-
11)
The 7-foot (2.1 m) jib has bail bars that allow positioning in-line with the main boom or 30
degrees offset from the main boom. The jib rating, either offset or in-line, is by load
radius only.
Example #1. Boom and jib are in-line at about 60 degree boom angle. Boom is fully
extended and boom and jib load radius is 10 feet (3.0 m). Capacity is 550 pounds (250
kg).
Example #2. Jib is offset 30 degrees from main boom. Boom is partly retracted and set
at about 45 degrees. Boom and jib load radius is 17 feet (5.0 m). Capacity is 425
pounds (200 kg).
CAUTION
Do not pick and carry with the 7-foot (2.1 m) jib installed.
FRONT AUXILIARY WINCH:
The front auxiliary winch is mounted behind the front bumper and is controlled from the
operator compartment. The winch, with 80 feet (24.4 m) of 5/16 inch (7.9 mm) diameter
6X36-IWRC-IPS wire rope (9,160 pound (4155 kg) breaking strength) and 2-ton hook,
has a single-part-line capacity of 2,500 pounds (1100 kg) on the first wrap. A pulling eye
is provided below the winch for two parting the line with a sheave block, allowing 5,000
pound (2200 kg) pulls. (An additional sheave block is not provided with this option.)
The front auxiliary winch is designed for the following uses:
1. As a tag line for restraining loads on the boom load line during pick-and-carry
operation.
2. To drag loads on the ground to a position where they may be safely lifted with the
boom.
3. To pull the crane out of mud or other obstacles.
4. To pull a smaller vehicle that is stuck.
WARNING
The front winch is not designed for lifting personnel or loads. Observe the
following safety rules:
1. Never lift or carry personnel with the winch and wire rope.
2. Do not allow anyone to stand near or under the load being moved.
3. Be sure the cable is securely anchored in the drum and that at least 5 wraps of
rope remain on the drum to insure against the rope pulling out of its anchor.
4. Stand clear of a loaded winch cable. If it breaks, it can be very dangerous.
5. Keep hands clear of the winch and any sheaves that the cable passes over when
the winch is being operated.
Courtesy of Crane.Market