SECTION II
CONTROLS AND OPERATION
The dead end of the rope is attached to the hook block
JIB ATTACHMENT
(or boom point) with a wedge type rope socket. The
rope socket should be installed on the rope as follows
The optional jib attachment is mounted on the boom
(see Figure 2-15):
point when it is in the operating position, and is stored
under the boom when not used.
1. Place the socket in an upright position as shown in
NOTE
View A, and bring the rope around in a large, easy to
Consult the rating plate in the
handle loop.
operator's cab for lifting capacities
when
operating
with
the
jib
2. The dead end of the rope should extend from the
attachment.
socket for a distance of at least one rope lay, permitting
To place the jib into the operating position from the
the strands to adjust around the wedge and to keep the
storage position, proceed as follows (see Figure 2-16):
rope in balance. Insert the wedge as shown in View B.
1. Rotate the upper so that the boom is over either side
3. Secure the ears of the socket to a sturdy support and
or the rear of the carrier. Do not attempt to unfold the jib
carefully take a strain on the live side of the rope. Pull
with the boom over the front of the carrier.
the wedge and rope loop into position tight enough to
hold the wedge in place during handling. Final wedge
2. Install T-pins (1), spacers (2), and cotter pins (3) to
positioning takes place under full operating loads.
attach the jib to the boom point. Install the T-pin upward
from the bottom so that the cotter pin will be on the
4. After the socket is pinned to the hook block (or boom
bottom side of the jib when it is erected.
point), apply gradually increasing loads until the wedge is
seated. Avoid applying any sudden shock loads before
3. Remove the hook block from the main or auxiliary
the wedge is in its final position. View C shows the
winch line, and attach the line to becket (4) with a rope
general operating appearance of the rope socket with the
socket. Take up the slack in the line with the winch, so
wedge pulled into the socket and the end of the wedge
that the jib point is supported by the line.
showing.
4. Remove capscrews (5), lockwashers (6), retainers (7)
and spacers (8). Remove cotter pin (9) and pin (10).
5. Elevate the boom to an angle of approximately 45
degrees, and extend the boom while paying out on the
winch line until the jib is suspended vertically from the
boom point.
6. Disconnect the winch line from becket (4) and attach
it to becket (11). Take up slack in the winch line to raise
the jib to the operating position.
7. Attach the jib suspension cable as shown in Figure 2-
17 to fix the jib at the required operating angle. The
angle at which the jib operates can be varied by
increasing or decreasing the length of the suspension
cable by means of cable links. The cable links are
installed between the main suspension cable and the
boom point. Figure 2-17 illustrates the positions at which
the jib can operate, and the number of cable links
required to obtain the operating angles shown.
8. Remove the winch line from becket (11) and attach
the hook block to the line.
Figure 2-15. Installing a Rope Socket
To place the jib into the storage position from the
operating position, proceed as follows (see Figure 2-16):
1-2-23
