Broderson IC-80-3L 4X2, Installation And Operating Manual

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SETTING THE OFFSET ANGLE ON THE OFFSETTABLE BOOM EXTENSION:
1. The boom extension must be installed on the main boom tip and the load line, downhaul
weight and wedge socket installed on the boom extension, and secured with all of the
retainer pins.
2. Draw the load line taut with the hoist by pulling the downhaul weight against the bottom
of the tip sheave plates while holding the Anti-Two-Block override switch under the
control panel.
W A R N I N G
Be careful not to operate the TELESCOPE lever while overriding the Anti-Two-
Block system. This may break the load line and allow the boom extension and
downhaul weight to fall, causing death or serious injury to personnel.
3. Remove the offset index pin from the boom extension knuckle. To loosen the pin, it
may be necessary to rock the boom extension tip up and down manually while
maintaining the proper tension in the load line.
4. Lower or raise the load line with the hoist until the 0, 15, or 30 degree offset holes align
in the knuckle.
5. Insert the index pin in the knuckle and retain it with the hairpin cotter.
STOWING THE OFFSETTABLE BOOM EXTENSION :
1. If the boom extension is offset to 15 or 30 degrees, return it to the zero offset position
as described above.
2. Reverse the procedure described in steps 7 through 14 in the Boom Extension
installation procedure on previous page.
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