General Machine Products CD-28 Adams Manual - Manual (Page 10)

10
Make certain that the wire rope is properly attached to the drum and that no less
than one half of the first lay remains on the drum at all times. Make certain that the
eye at the end of the winch line is properly spliced or swaged. Wire rope (winch
line) may be old, damaged or weakened by such defects as kinks, cuts, extreme
bends or loops. Such conditions are potentially dangerous and detrimental to safe
operation of the winch. The wire rope must be routinely inspected at regular inter-
vals and replaced when worn.
Load demands on the winch, wire rope or extension shaft should not exceed their
rated maximum pulling capacity.
Make certain that the winch clutch is positively engaged before starting the pull.
Do not operate the winch at speeds faster than necessary.
When pulling in, do not allow the wire rope to build up in one location on the
drum. This can cause wire rope "roll-over" and possible erratic, damaging pulls.
WIRE ROPE
GENERAL INFORMA-
TION
OVERWINDING
UNDERWINDING
INSTALLATION It is important to select the correct winch and wire rope for a particular application.
Wire rope is specified in terms of diameter, length, number of strands, number of
wires per strand, type of center and type of lay. Refer to table on back cover for
winch drum capacities.
There is a definite advantage in applying wire rope of the proper direction of lay
when spooling onto a smooth surface winch drum.
Wire rope with an improper lay will permit the coils to spread apart each time the
load is removed. Using wire rope with the proper lay will tend to keep the coils
together when tension is removed. The correct lay will develop tight coils and even
layers.
Overwinding is when the winch drum is rotating in the clockwise direction (view-
ing from the right side) and the wire rope is spooled onto the winch drum at the top.
This is the standard method for the CD-22 or CD-28 winches.
It should be noted that on these winches the rope clamp is located on the left side of
the drum. Or, the rope is attached at the left and spools to the right. This condition
requires the wire rope to have a left lay.
Underwinding is when the winch drum rotates in a counterclockwise direction
(viewing from the right side) and the wire rope is spooled onto the winch drum at
the bottom. While this is a standard requirement, "underwind application" should
be specified on the initial order. Caution should be taken to check the assembly of
the one-way clutch relative to the drum direction of rotation.
For underwind applications, the wire rope must be guided and maintained as it is
routed forward under the body deck to the winch drum. This can be done by using a
trough or tube with sufficient width at the front section to allow the wire rope to
freely traverse the width of the drum. As the wire rope travels to the drum, and de-
pending on the angle of incline combined with the body crossmember configura-
tion, a floating sheave or roller may be required.
It is important to install the wire rope onto the winch drum with care. Kinking of
the rope, caused by the rope taking a spiral shape as a result of an unnatural twist,
should be avoided.
When removing wire rope from the reel and spooling onto the winch drum, the reel
must be supported on a horizontal axis and free to rotate. Spool the rope onto the
drum with the natural bend in the same direction as it comes off the reel.
If wire rope is received in a coil, it should be unwound with the coil in the vertical
plane. Again, spool the rope onto the winch drum with the natural bend in the same
direction as it was on the coil.