National Crane PUBLISHED 04-26-2019 CONTROL # 113-09 6-3
600E2 OPERATOR MANUAL MAINTENANCE CHECKLIST
HOIST CABLE INSPECTION AND
MAINTENANCE
Wire rope should be inspected frequently/daily and
periodically/yearly in accordance with the following
information excerpted from a National Consensus Standard
as referenced by Federal Government Agencies.
Recommended inspection intervals may vary from crane to
crane and may vary based on environmental conditions,
frequency of lifts, and exposure to shock loads. The
inspection time intervals may also be predetermined by state
and local regulatory agencies.
NOTE: Wire rope may be purchased through Manitowoc
Crane Care.
Any deterioration observed in the wire rope should be noted
in the equipment inspection log and an assessment
concerning wire rope replacement should be made by a
qualified person.
Keeping Records
A signed and dated report of the wire rope’s condition at
each periodic inspection must be kept on file at all times. The
report must cover all inspection points listed in this section.
The information in the records can then be used to establish
data which can be used to determine when a wire rope
should be replaced.
It is recommended that the wire rope inspection program
include reports on the examination of wire rope removed
from service. This information can be used to establish a
relationship between visual inspection and the rope’s actual
internal condition at the time of removal from service.
Environmental Conditions
The life expectancy of wire rope may vary due to the degree
of environmental hostility and other conditions to which these
mechanical devices are subjected. Variation in temperature,
continuous excessive moisture levels, exposure to corrosive
chemicals or vapors or subjecting the wire rope to abrasive
material may shorten normal wire rope life. Frequent/
periodic inspections and maintenance of wire rope is
recommended for preventing premature wear and to insure
long-term satisfactory performance.
NOTE: Refer to Wire Rope Lubrication, page 5-8 for wire
rope lubrication requirements.
Dynamic Shock Loads
Subjecting wire rope to abnormal loads beyond the
endurance limit will shorten the wire rope life expectancy.
Examples of this type of loading are listed below.
• High velocity movement, for example; hoisting or
swinging of a load followed by abrupt stops.
• Suspending loads while traveling over irregular surfaces
such as railroad tracks, potholes, and rough terrain.
• Lifting a load that is beyond the rated capacity of the
lifting mechanism, such as overloading.
Precautions and Recommendations During
Inspection
• Always use safety glasses for eye protection.
• Wear protective clothing, gloves, and safety shoes as
appropriate.
• Measure the rope’s diameter across crowns of the
strands when determining if rope has become damaged,
refer to Figure 6-1.
Inspection
All hoist cable in service needs to be inspected on a daily,
monthly, and quarterly basis. Cable which has been idle for a
period of a month or more must be given a thorough
inspection before it is placed in service. These inspections
should cover all types of deterioration including:
• Distortion such as kinking, crushing, un-stranding, bird
caging, main strand displacement or core protrusion.
• Loss of cable diameter in a short cable length or
unevenness of outer strands indicates the cable needs
to be replaced.
• Significant corrosion.
• Broken or cut strands.
• Number, distribution and type of visible broken wires.
WARNING
Worn or Damaged Equipment Hazard!
Never use a worn or damaged wire rope. Death or serious
injury could result from using worn or damaged wire rope.
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