Manitowoc 2250 Service And Maintenance Manual

Reference Only
HOISTS 2250 SERVICE/MAINTENANCE MANUAL
5-28
Published 11-06-15, Control # 040-13
• Running Ropes (working lines) — six randomly
distributed broken wires in one lay length, or three
broken wires in one strand of one lay length.
• Rotation Resistant Rope — two randomly distributed
broken wires in six rope diameters or four randomly
distributed broken wires in thirty rope diameters.
• Standing Ropes (pendants) — more than two broken
wires in one lay length in sections beyond the end
attachment, or more than one broken wire at the end
attachment (Figure 5-24
).
• All Ropes — one outer wire broken at the point of
contact with the core. The broken wire protrudes or
loops out of the rope structure.
United States Steel states “Replacement criteria for
galvanized strand boom suspension pendants are
25 percent of the outer wires fractured, or 10 percent
of the total numbers, whichever comes first.”
Wear and Other Damage
See Figure 5-25 for examples of wire rope damage.
It is normal for the outer wires of the rope to wear first
because of friction.
Wire rope must be taken out of service if:
• Rope core protrudes from between outer strands
• Severed corrosion – indicated by pitting – exists
• Obvious damage exists from any heat source to include
– but not limited to – welding, power line strike, or
lightning.
• Kinking, crushing, bird caging, or any other damage
resulting in distortion of wire rope structure exists.
FIGURE 5-23
A925
LAY LENGTH is distance measured along rope in which one
strand makes one complete revolution around core.
Core
One
Wire
One Strand
FIGURE 5-24
WARNING
Replace wire rope when more than one
broken wire appears at point marked by arrow.
S140
Poured Zinc Socket
S142
S141
S143
Hand Splice
Swaged Socket
Wedge Socket
S4412-144
Button Socket

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English