12 10621 Owner’s Manual
Wire Rope Inspection Points
While inspection of the entire rope is
required, attention should be directed to
these critical points:
1. Pick-up Points for signs of wear due to
str
ess from repeated lifts.
2. End Attachments for corrosion and broken
wires at both ends of the rope.
3. Drums for signs of corrugation and wear
that may lead to wir
e damage.
4. Sheaves to ensure that each sheave has
the pr
oper groove size and contour.
5. Abuse Points for heavy amounts of
scuffing and scraping.
It is important to perform detailed
inspections of all ropes associated with the
crane. These inspections can be divided
into two types:
1. Frequent Inspection
A. All running ropes should be inspected
once each working day. These visual
observations will be concerned with
discovering damage that may be an
immediate hazar
d. The following
concerns should be addressed:
1. Distortion of the rope.
2. General corrosion.
3. Broken or cut strands.
B. Use caution while inspecting sections of
rapid deterioration.
C. Use caution while inspecting boom
hoist ropes. Proper inspection is critical
but difficult.
2. Periodic Inspection
A. Inspection frequency will be
deter
mined by a qualified person and
will be based on such factors as
expected rope life, environment
conditions, capacity of typical lifts,
rates of usage, and exposure to shock
loads. Periodic inspection needs to be
performed at least annually.
B. Periodic inspections will be performed
by a qualified individual and will cover
the entire length of the rope. Only the
surface wires of the rope need to be
inspected. This inspection will be
concerned with discovering damage
that may be an immediate hazard. The
following concerns should be
addressed:
1. Distortion of the rope.
2. General corrosion.
3. Broken or cut strands.
4. Reduction of rope diameter.
5. Corroded or broken wires at end
connections.
6. Corroded, cracked, bent, worn, or
improperly applied end
connections.
C. Use caution when inspecting the
following:
1. Sections in contact with saddles,
equalizer sheaves, or other sheaves
where rope travel is limited.
2. Sections of the rope at or near ends
with corroded or broken wires.
Wire Rope Replacement
Rope replacement guidelines are as follows:
1. Broken wires, including standing ropes
with more than two broken wires in one
lay or more than one broken wir
e at an
end connection.
2. Wear of one-third the original diameter of
the outside wires.
3. Distortion of the rope structure.
4. Evidence of heat damage.
5. Reductions from nominal diameters of
more than 1/64 in. (0.4 mm) for diameters
from 5/16 in.(19.0 mm) and 1/32 in. (0.8
mm) for diameters from 3/8 in. (9.5 mm) to
and including 1/2 in. (13.0 mm).
Wire Rope Maintenance
Proper maintenance is key in ensuring a
long lasting rope. These three tips will help:
1. Store the rope to prevent damage.
2. A
void objects that may scrape, bend, or
crush the wires of the rope.
3. Always keep the rope well-lubricated.
Wire Rope Maintenance
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