M A E D A Mini-Crawler Crane Section 5 – GENERAL MACHINE MAINTENANCE
1/2019 MC285C-3 5-63
Wire Rope
General Information and Precautions
Contact us or our sales service agency for
additional information on replacing and repairing
wire rope.
WARNING! Exposure Hazard. Always wear
leather gloves when handling wire rope.
NOTICE: Do not use old wire ropes, even if they
have not been used.
Always use the Maeda genuine wire rope as
specified for the application by Maeda.
Inspecting Wire Rope
Inspect all wire ropes daily before work and
inspect the sheave at the tip of the boom and the
sheave of the hook block. Damaged sheaves
accelerate the damage of the wire ropes. Replace
components immediately if at or beyond the
replacement standard.
The benchmark for replacing wire ropes is
common to all wire ropes for winching,
telescoping the boom and slinging.
Wire rope fatigues with normal use. Change wire
ropes when they show the following signs:
• Broken wire
• In running rope, six randomly distributed broken
wires in one lay or three broken wires in one
strand in one lay
Fig. 5-134
• Kinking, crushing, birdcaging or any other
damage resulting in distortion of the rope
structure
• Evidence of any heat damage
Fig. 5-135
• Wire rope with a diameter of 9 mm should be
replaced when it becomes 8.4 mm.
• Wire rope with a diameter of 8 mm should be
replaced when it becomes 7.5 mm.
• Wire rope with a diameter of 7 mm should be
replaced when it becomes 6.6 mm.
• Wire rope with a diameter of 6 mm should be
replaced when it becomes 5.6 mm.
• Wire rope with a diameter of 5 mm should be
replaced when it becomes 4.7 mm.
Fig. 5-136
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