TM 5-3815-221-14&P
Establish a means of communicating with the operator
WARNING
and have him slowly wind the rope onto the drum by
Wear approved leather gloves when
moving the appropriate drum lever to the raise position.
working with wire rope.
A lead or brass hammer may be useful in tapping the
rope over as it is being wound on the drum. Do not use a
LOAD LINE REEVING The reeving of the dipperstick
steel hammer or pinch bar. These can readily cause
and digging ball lines are shown in Figure 5. Table 1
damage to the rope.
gives rope length and type information. Both drums are
over spooled as shown in Figure 4.
USE OF WEDGES. The dead end of the rope is
NSTALLING ROPE ON DRUMS. The manner in who
attached with a wedge type rope socket. The rope socket
new or replacement wire rope is installed on the drum to
should be
a large measure, determine the service life of that
Improperly wound ropes will cause undue crushing of the
rope, doglegs, kinks, excessive abrasion and cutting of
the individual wires. Bad spooling also causes uneven
application tion of force and motion. This results in fast
fatiguing of the rope from the boom to the drum.
The following five precautionary steps should be taken
particularly with a replacement wire rope, before starting
the actual installation of the rope.
1. A check should be made of the drum to determine
condition. size and shape of the drum grooves, if
equipped.
2. Drum flanges should be checked to determine extent,
if any, of undercutting at the base of the flange
3. Dirt, grit or any other type of debris should be cleaned
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 repaired or replaced. This recommendation is
made only to improve or maintain good rope life, but to
Figure 6. Installing a Rope Socket.
eliminate potential hazard.
1. Thread the rope through the socket and bring it
After establishing the satisfactory condition of the drum
around in an easy to handle loop. Allow the rope to
mount the reel of wire rope on suitable jacks. Reeve
assume its natural lay; do not twist the rope.
boom hoist or load line and attach the rope to the drum
WARNING
shown in Figure 5.
The live end of the rope must be in a
straight line through the socket.
NOTE
2. The dead end of the rope must not extend more than
A tension should be induced into the
7 inches past the end of the socket. Insert the wedge in
rope by providing some means of
the rope loop and pull the wedge and rope loop tight
braking the shipping reel while
enough to hold the wedge in position during handling.
installing the rope on the drum. A
Final wedge positioning will take place under full
tight winding imperative.
operating loads.
WARNING
WARNING
Make sure the live end of the rope is
not kinked 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
Figure 5. Securing Rope to Drum.
5
