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Fault |
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Possible Cause |
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Accelerated Wear |
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Severe abrasion from being dragged
over the ground or obstructions.
Rope not suitable for application.
Poorly aligned sheaves.
Large fleet angle.
Worn sheave with improper groove, size or shape.
Sheaves and rollers have rough wear surface.
Stiff or seized sheave bearings.
High bearing and contact pressures.
Sheaves/drum too small. |
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Rapid Appearance
of Broken Wires |
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Rope not suitable for application.
Reverse bends.
Sheaves/drums too small.
Overload and shock loads.
Excessive rope vibration.
Kinks that have formed and have been straightened out.
Crushing and flattening of the rope.
Sheave wobble. |
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Corrosion |
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Inadequate lubrication.
Improper storage.
Exposure to acids or alkalis. |
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Kinks |
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Improper installation.
Improper handling.
Slack rope pulled tight. |
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Excessive localized
Wear |
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Drum crushing.
Equalizer Sheave.
Vibration. |
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Fault |
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Possible Cause |
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Stretch |
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Overload.
Passed normal stretch and approaches failure. |
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Broken Wires near
Fitting |
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Rope Vibration.
Fittings get pulled too close to sheave or drum. |
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Sheaves/Drums
Wear out |
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Material too soft |
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Pinching, Crushing,
oval Shape |
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Sheaves grooves too small.
Not following proper installation and maintenance procedure on multiple
layer drums |
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Rope Unlays
(Opens up) |
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Wrong rope construction.
Rope end attached to swivel. |
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Reduction in Diameter |
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Broken core.
Overload.
Internal wear.
Corrosion. |
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Bird Cage |
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Tight Sheaves.
Rope is forced to rotate around its own axis.
Shock loads.
Improper Wedge Socket installation. |
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Core Protrusion |
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Shock loading.
Disturbed rope lay.
Rope unlays.
Load spins and rotates rope around its own axis. |
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