SECTION IV
MACHINE RIGGING
3. Dirt, grit or any other type of debris should be cleaned off
the drum.
4. Bearings should be checked
5. Cracks or breaks in the drum should be reported.
Whenever any of these conditions are observed, the drum
should be removed from service and properly cleaned, re-
paired or replaced. This recommendation is made not only
to improve or maintain good rope Iife, but to eliminate a po-
tential hazard.
After establishing the satisfactory condition of the drum,
mount the reel of wire rope on suitable jacks. Reeve the
boom hoist or load line and attach the rope to the drum as
shown in Figure 4-5.
NOTE
A tension should be induced into the rope by provid-
ing some means of braking the shipping reel while in-
stalling the rope on the drum. A tight winding is im-
peratlve.
Figure 4-6. Installing a Rope Socket
2. The dead end of the rope must not extend more than 7
inches past the end of the socket insert the wedge in the
rope loop and pull the wedge and rope loop tight enough to
hold the wedge in position during handling. Final wedge po-
sitioning will take place under full operating loads.
Make sure the live end of the rope is not kinked
Figure 4-5 Securing Rope to Drum
at the point where it leaves the socket.
3. After the socket is pinned to the boom point or hook
block, apply gradually increasIng loads until the wedge is
seated in the socket. Avoid any sudden shock loads before
the wedge is in its final position. When seated properly, the
Keep hands and clothing clear of the rotating
wedge will just protrude beyond the end of the socket.
drum.
4. Cut a piece of rope and secure it to the dead end of the
Establish a means of communicating with the operator and
rope with two clamps as shown in the illustration.
have him slowly wind the rope onto the drum by moving the
appropriate drum lever to the raise position A lead or brass
GANTRY
hammer may be useful in tapping the rope over as it is being
GENERAL. The gantry features folding two piece tension
wound on the drum. Do not use a steel hammer or pinch
members. By means of pins, the gantrycan be placed in two
bar. These can readily cause damage to the rope.
positions, raised or travel.
USE OF WEDGES. The dead end of the rope is attached with
The gantry may be lowered to reduce the overhead clear-
a wedge type rope socket The rope socket should be instal-
ance when moving the machine. It is recommended to
led on the boom as follows (see Figure 4-6):
travel with the gantry in the raised position when conditions
1. Thread the rope through the socket and bring it around in
allow. The gantry must always be in the raised (extended)
an easy to handle loop. Allow the rope to assume its natural
position when the machine is in operation.
lay; do not twist the rope.
RAISING THE GANTRY Raising the gantry is accomplished
as follows (see Figure 4-7):
1. Lower the boom onto blocking with a minimum height of
6 inches at the boom point and pay out some line from the
The live end of the rope must be in a straight
boom hoist drum to provide slack in the hoist Iines.
line through the socket.
