Maeda MC815C, Operation Manual, Page: 301 / 426

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[3] REPLACEMENT OF WINCH WIRE ROPE
Always put on thick leather work gloves when replacing the wire rope.
CAUTION
• The diameter of the wire rope is measured at points where the wire repeatedly runs
through the sheave. A mean value needs to be determined through 3 way
measurement. (A measurement should be performed not only at one point but at
several points, spacing between the points.)
• Do not use old wire rope regardless of the frequency of use.
[CRITERIA FOR WIRE ROPE REPLACEMENT]
A wire rope undergoes wear and tear over time.
Prompt replacement is required if any of the following
appears in the wire rope.
• 10 % or more of strands (except a filler wire) in 1 twist of
a wire rope (6 crests) are broken.
NOTES
9 strands or greater for winch. Replace the boom
telescoping wire rope when 13 or more wires are broken.
• Wear equivalent to 7 % or more of a nominal diameter
occurred in the wire rope diameter.
NOTES
• Replace the 9 mm diameter wire rope when reduced to
8.4 mm
• Replace the 10 mm diameter wire rope when reduced to
9.3 mm
• Replace the 12.5 mm diameter wire rope when reduced
to 11.7 mm
• A kink is formed.
• Considerable deformation or corrosion is developed.
• A faulty end socket is used.