Wire Rope Selection - Allied Systems H4A Operating Manual

Wire Rope Selection

The H4A winch can have a variety of wire rope sizes
installed by the user. The maximum wire rope size is shown
on the nameplate. See Figure 2 for other recommended
wire rope sizes and drum capacities. In some situations,
the winch can create a tension in the wire rope that is
greater than the strength of the wire rope. The user must
be careful to select a wire rope that has enough strength
and length for the job. Wire rope made from Extra Improved
Plow Steel (EIPS) with Independent Wire Rope Core
(IWRC) is recommended.
WARNING
Wear gloves when handling wire rope,
as broken strands in the wire rope cause
severe lacerations. Never let the wire rope
slide through your hands. Always use the
hand over hand method for handling wire
rope.
The wire rope is attached to the drum using a wire rope
ferrule. The ferrule is held in the drum pocket by the lip
of the pocket and by a breakaway ferrule retainer. The
breakaway retainer allows the ferrule to be pulled out of
the pocket by a runaway load. The correct ferrule size is
2 inches long with a 1.5-inch diameter and is commonly
known as a "Bantam" ferrule.
WARNING
During operation of the winch, the operator
must know or estimate the line pull and
make sure that the line pull is within the
capacity of the winch and the specifi cations
of the wire rope installed on the drum.
A broken wire rope under high tension
can return suddenly in the direction of
the winch and cause injury and damage.
ALWAYS USE A REAR SCREEN FOR
OPERATOR PROTECTION AGAINST WIRE
ROPE BREAKING.
Wire Rope Diameter
1/2 in. (13mm)
5/8 in. (16mm)
3/4 in. (19mm)
NOTE: Loosely or unevenly spooled line will reduce
capacities.
Figure 2 - Wire Rope Sizes and Drum Line Capacities
(See *Note on page 14)
General
Capacity
422 ft. (129m)
277 ft. (84m)
195 ft. (59m)
3