Manitowoc Grove GMK 4100L-1, Maintenance Manual

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Maintenance work on the superstructure
8.8 Hoist ropes
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GMK 4100L-1
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Risk of accidents due to reduced load bearing capacity.
Remember that other factors may also make it necessary to replace a rope
before the number of wire breaks requiring rope replacement has been
reached (age of rope, frequency of use or exceptional loading).
Damage Description Cause Replacement
Wire break (1) Individual wires are
broken; the broken
ends of the wires
are protruding
from the rope. General wear caused
by ageing of the rope
or
consequential
damage as a result of
damage to the rope.
Replace the rope at the latest
when the maximum
permissible number of wire
breaks according to the table
are visible externally.
Replace the rope immediately if
wire wire breakage clusters or
strand breakages occur.
The frequency of wire breaks
increases with a rope's age. For
reasons of safety, it is advisable
to replace the rope while the
number of wire breaks is still
low.
Wire break-
age cluster (2)
Strand
breakage (3)
Effect of heat Tarnishing colour
is visible externally
on the rope. Rope has been
subjected to excessive
heat. Replace the rope immediately .