Manitowoc CD25, Руководство оператора, Страница: 114 / 160

MAINTENANCE CD25
6-4 Published 1-06-2017 Control # 579-01
Wire Rope Inspection (Running Ropes and
Pendant Cables)
Wire rope should be inspected frequently/daily and
periodically/yearly in accordance with the following
information excerpted from a National Consensus Standard
a s r e f e r e n c e d b y F e d e r al G o v e r n m e n t A g e n c i e s .
Recommended inspection intervals may vary from machine
to machine 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.
Frequent Inspection
A frequent daily visual inspection is recommended for all
running ropes in service. This inspection should be made on
all wire rope which can be expected to be in use during the
day’s operation. This inspection should be used to monitor
progressive degradation and to discover severe damages
necessitating wire rope replacement such as:
• Distortion, Kinking, Crushing, Un-stranding, Bird caging,
Reduction of diameter, etc.
• General corrosion.
• Broken or cut strands.
• Number, distribution and type of broken wires.
• Evidence of core failure.
• End fitting wear/abrasion.
Pay particular attention to areas of the rope where wear and
other damage is likely to occur:
- Pick-up Points: Sections of wire rope that are
repeatedly stressed during each lift, such as
those sections in contact with sheaves.
- End Attachments: The point where a fitting is
attached to the wire rope or the point where the
wire rope is attached to the drum.
- Abuse Points: The point where the wire rope is
subjected to abnormal scuffing and scraping.
Periodic Inspection
Wire rope should be inspected periodically/annually or at a
shorter time interval if necessitated by environmental or
other adverse conditions, and shall cover the entire length of
the wire rope. Only the outer surface of the wire rope need
be inspected, and no attempt should be made to open the
rope. Periodic inspection should include all items listed
under frequent inspection plus the following:
• Inspect for reduction of rope diameter below nominal
diameter.
• Inspect for severely corroded or broken wires at end
connections.
• Inspect for severely corroded, cracked, bent, worn, or
improperly applied end connections.
• Inspect wire rope in areas subjected to rapid
deterioration such as:
• Sections in contact with saddles, equalizer sheaves,
or other sheaves where wire rope travel is limited.
• Sections of wire rope at or near terminal ends where
corroded or broken wires may protrude.
• Inspect boom nose sheaves, hook block sheaves, boom
extension/jib sheaves, auxiliary boom nose sheaves,
and hoist drums for wear. Damaged sheaves or hoist
d r u m s c a n a c c e l e r a t e w e a r a n d c a u s e r a p i d
deterioration of the wire rope.
Wire Rope Inspection (Boom Extension and
Retraction Cables)
Periodic Inspection‘
If the boom has not been disassembled and inspected in the
last five years or 3,000 hours of use, the boom is to be
completely torn down to allow a thorough inspection of the
extend and retract cables, sheaves, and pins.
A925
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FIGURE 6-2
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Reference Only