CONTROL AND OPERATION
SECTION II
increases. When practical, use the minimum number of parts
4. After the socket is pinned to the hook block (or boom
point), apply gradually increasing loads until the wedge is
required for the loads to be lifted.
seated. Avoid applying any sudden shock loads before the
wedge is in its final position. View C shows the general
NOTE
operating appearance of the rope socket with the wedge
Jib reeving is limited to a single part of line. The main
pulled into the socket and the end of the wedge showing.
or auxiliary winch line can be used to reeve the jib.
The auxiliary winch line cannot, however, be used for
JIB ATTACHMENT
reeving the main hoist line.
The optional jib attachment is mounted on the boom point
The dead end of rope is attached to the hook block (or
when it is in the operating position, and is stored under the
boom point) with a wedge type rope socket. The rope
socket should be installed on the rope as follows (see Figure
boom when not used.
2-15):
NOTE
1. Place the socket in an upright position as shown in View
Consult the rating plate in the operator's cab for
A. and bring the rope around in a large, easy to handle
lifting capacities when operating with the jib attach-
loop.
ment.
2. The dead end of the rope should extended from the socket
for a distance of at least one rope lay, permitting the strands
To place the jib into the operating position from the stor-
to adjust around the wedge and to keep the rope in balance.
age position, proceed as follows (see Figure 2-16):
Insert the wedge as shown in View B.
1. Rotate the upper so that the boom is over either side or
the rear of the carrier. Do not attempt to unfold the jib
3. Secure the ears of the socket to a sturdy support and
with the boom over the front of the carrier.
carefully take a strain on the live side of, the rope. Pull the
wedge and rope loop into position tight enough to hold the
wedge in place during handling. Final wedge positioning
2. Install T-pins (1), spacers (2), and cotter pins (3) to
attach the jib to the boom point. lnstall the T-pin upward
takes place under full operating loads.
from the bottom to that the cotter pin will be on the
bottom side of the jib when it is erected.
3. Remove the hook block from the main or auxiliary
winch line, ad attach the line to becket (4) with a rope
socket. Take up the slack in the line with the winch so that
the jib point is supported by the line.
4. Removes 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 de-
grees, 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 backet (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 de-
creaing the length of the suspension cable by means of
cable links. The cable links are installed between the main
Figure 2.16. Installing a Rope Socket
2-21
