Manitowoc 18000, Руководство по техническому обслуживанию, Страница: 229 / 316

Reference
Only
Manitowoc
Published 12-05-17, Control # 035-23
5-15
18000 SERIVCE/MAINTENANCE MANUAL HOISTS
5
WIRE ROPE INSPECTION AND
REPLACEMENT
The following information is from various wire rope
manufacturers and includes inspection, replacement, and
maintenance guidelines for wire rope as established by
ANSI/ASME B30.5, federal regulations, and Manitowoc
Cranes.
Wire Rope Lubrication
Refer to the lube folio for lubrication techniques.
Do not use grease to lubricate wire rope. Grease will not
penetrate the rope properly and will build up in the valleys
between the wires and strands. This buildup will inhibit rope
inspection and could trap moisture in the rope’s interior.
A high-quality wire rope lubricant is available from the
Manitowoc Crane Care Lattice Team. Otherwise, consult
your wire rope supplier.
Maintain a Wire Rope Condition Report
Always keep on file a signed and dated periodic inspection
report of the wire rope’s condition. The report must cover all
inspection points discussed in this section. The information
in the reports can then be used to determine when a wire
rope should be replaced.
After initial loading of a new rope, measure and record its
diameter for comparison with future inspections. Measure
the rope’s diameter across the crowns of the strands so the
true diameter is measured as shown in
Figure 5-12 .
Wire rope removed from service should be examined and a
corresponding report kept. This information can be used to
establish a relationship between visual inspection and the
rope’s actual internal condition at the time of its removal from
service. See Replacement Criteria for inspection guidelines.
Required Inspection Intervals
The frequency of wire rope inspection must be:
• Daily (see Daily Inspection)
and, at minimum:
• Yearly (see Periodic Comprehensive Inspection)
Wire Rope Care and Replacement Guidelines
1. When replacing fixed-length wire rope assemblies (such
as pendants) having permanently attached end fittings,
use only pre-assembled lengths of wire rope as supplied
from Manitowoc. Do not build lengths from individual
components.
2. Replace an entire wire rope assembly. Do not attempt to
rework damaged wire rope or wire rope ends.
3. Never electroplate a wire rope assembly.
4. Do not weld any wire rope assembly or component
unless welding is recommended by the wire rope
manufacturer.
Welding spatter must never be allowed to come in
contact with the wire rope or wire rope ends. In addition,
be sure that the wire rope is not an electrical path during
other welding operations.
5. Wire ropes are manufactured from special steels. If
heating a wire rope assembly is absolutely necessary for
removal, the entire wire rope assembly must be
discarded.
6. On systems equipped with two or more wire rope
assemblies operating as a matched set, they must be
replaced as an entire set.
7. Do not paint or coat wire ropes with any substance
except approved lubricants.
Daily Inspection
Wire rope should be inspected in accordance with ANSI/
ASME B30.5 and OSHA 29 CFR 1926.1413. A running
record of the condition of each wire rope should be noted in
the equipment inspection log.
1. Each work day, prior to crane work, visually inspect all
rope that can reasonably be expected to be used that
day. Check for obvious damage, including:
- Rope defects such as shown in Figure 5-11
- Loss of rope diameter (see Reduction in the Rope
Diameter )
- Broken wires—Record the number, distribution and
type of broken wires (see
Broken Rope Wires ).
- Internal wear or broken wires for ropes operating on
synthetic sheaves. Common indicators of internal
deterioration include localized reduction in rope
diameter, corrosion between the strands, localized
lengthening of lay, wire displacement, or wire
distortion.
WARNING
Personal Injury Hazard
Prior to conducting an inspection of wire rope:
• Lock out the equipment power when removing or
installing the wire rope assemblies.
• Use safety glasses for eye protection.
• Wear protective clothing, gloves, and safety shoes as
appropriate.
• Use supports and clamps to prevent uncontrolled
movement of the wire rope, parts, and equipment.