7
Inspection and maintenance
07.2020
135
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Loop formations
➢
Replace wire ropes with loop formations.
Local increase of the rope diameter
➢
Replace wire ropes with the following local rope diameter increases.
≤ 5
% with wire ropes with steel core
≤ 10
% with wire ropes with fibre core
Flattening
➢
Check wire ropes with flattening daily and replace if necessary.
Kinks or tightened rope loops
➢
Replace wire ropes with kinks or tightened rope loops.
Bends
➢
Replace wire ropes with severe bends.
Damage due to the effects of heat or arcs
➢
Replace wire ropes with bluish discolouration or broken or melted wires.
Wire breakages
➢
Relieve the rope tension and bend the rope roughly by hand to the radius of the rope
pulley.
➢
Compare visible wire breakages with the number of wire breakages permitted (see
rope certificate) and replace if necessary.
Twist formation
Wire ropes must be checked daily for twist formations.
➢
Travel to the highest and lowest hook position without a load.
➢
With visible twist formations, untwist the wire rope (see section 4.13
Rope
reeving
and the section section
Discarding a wire rope
).
