Manitowoc 16000 User Manual

Reference Only
HOISTS 16000 SERVICE/MAINTENANCE MANUAL
5-12
Published 05-03-17, Control # 228-03
• Exposure to abuse and shock loads, such as the
following conditions:
- High-velocity movement, such as hoisting or
swinging of a load followed by abrupt stops
- Load suspension while traveling over irregular
surfaces such as railroad tracks, potholes, and
rough terrain
- Load movement beyond the rated capacity of the
lifting mechanism (overloading)
NOTE: Inspection intervals may also be predetermined by
state and local regulatory agencies.
Replacement Criteria
The decision as to when a wire rope should be replaced is
the responsibility of the qualified person who is appointed to
review the rope inspection records and evaluate the rope
condition.
The following are indications that the rope needs to be
replaced:
• Reduction in the rope diameter and excessive broken
wires. See the Reduction in Rope Diameter
and Broken
Rope Wires topics.
• Wear of one-third of the original diameter of outside
individual wires
• Kinking, crushing, birdcaging, or any other damage
resulting in distortion of the rope structure
• Evidence of any heat damage from any cause
• Severe corrosion, as evidenced by pitting
• Independent wire rope core (IWRC) or strand core
protrusion between outer strands
• Obvious damage from any heat source including, but not
limited to, welding, power line strike, or lightning
Reduction in Rope Diameter
A reduction in rope diameter is often the first outward sign
that the rope core is damaged. Reduction in rope diameter
can be caused by loss of core support, internal or external
corrosion, or wear of the outside wires.
After the initial loading of a new wire rope, measure and
record the diameter for comparison to future inspections.
See the Maintain a Wire Rope Condition Report
topic.
The wire rope must be taken out of service when the
reduction from its nominal diameter is more than 5
percent.
Broken Rope Wires
When conducting the Periodic Comprehensive Inspection,
thoroughly clean the wire rope so any breaks can be seen.
Relax the rope, move it off any pick-up points, and flex it as
much as possible. Use a sharp awl to pick and probe
between wires and strands, lifting any wire that appears
loose or moves excessively. Do not open strands of rotation-
resistant rope.
Wire breaks are typically at the crown of the strands, the
area that contacts the sheave or drum when a load is picked
up. Breaks at the crown will appear as small gaps in a wire.
In comparison, when wires in the valley of a strand break, the
broken ends will rise up and are easier to notice.
NOTE: The Daily Inspection does not require that the rope
be cleaned or probed.
See Figure 5-9
for an explanation of lay length.
The wire rope must be taken out of service when it has
the following number of broken wires:
• Running Ropes—six randomly broken wires in one lay
length or three broken wires in one strand in one lay
length.
• 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 (see Figure 5-8
).
• Rotation-resistant Rope—two randomly distributed
broken wires in six rope diameters or four randomly
distributed broken wires in 30 rope diameters.
• All Ropes—one outer wire broken at the point of contact
with the core that protrudes or loops out of the rope
structure. Additional inspection is required.
• End Attachments (Figure 5-8
)—more than one broken
wire appears at the attachment. (Replace the rope or cut
off the affected area and reattach the fitting).
FIGURE 5-7

Manitowoc 16000 Specifications

General

Brand	Manitowoc
Model	16000
Category	Construction Equipment
Language	English