Manitowoc Grove GMK 4100L-1 Maintenance Manual page 293

Damage
Reduced The diameter of the
diameter (1) rope has become
smaller along large
sections.
Corkscrew- The rope winds its
type rope way along its
deforma- longitudinal axis in a
tion (2) way that is similar to
a corkscrew.
Deformation is
measured with
suspended hook
block.
Basketlike Wires of the outer
deforma- layer protrude. In
tion (3) other areas of the
rope, the insert has
buckled or is
protruding from the
rope.
Maintenance manual
GMK 4100L-1
Description
Structural changes
Corrosion or abrasion.
Damage resulting
from overloading.
Outer and inner layers
have been displaced
in relation to each
other.
Cause
3 302 364 en
Maintenance work on the superstructure
Replacement
Replace the rope immediately
if the diameter has decreased
by 15% or more compared to
the nominal diameter.
Replace the rope immediately
if the diameter has decreased
by 10% or more compared to
the nominal diameter.
Even a small amount of
deformation leads to increased
abrasion, wire breaks and
rough operation of the rope
drive.
If deformation 'x' at a position
on the rope is greater than a
third of the rope diameter, the
rope must be replaced
immediately.
Replace the rope immediately.
8.8 Hoist ropes
s
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