Manitowoc 16000 - Determining Frequency of Inspection; Periodic Comprehensive Inspection

Reference Only
Manitowoc Published 05-03-17, Control # 228-03 5-11
16000 SERVICE/MAINTENANCE MANUAL HOISTS
5
Periodic Comprehensive Inspection
The comprehensive inspection must be completed by a
qualified person. The inspection must include pulling all the
rope off the drum and carefully inspecting the entire length.
The inspection must include the following areas:
• All points listed under the Daily Inspection
topic
• Diameter (see the Reduction in Rope Diameter
topic)
• Comprehensive examination for broken wires (see the
Broken Rope Wires
topic)
• End connections including broken wires or severely
corroded, cracked, bent, worn, or improperly applied
end connections
• Areas subjected to rapid deterioration such as the
following areas:
- Sections in contact with saddles, equalizer sheaves,
or other sheaves where wire rope travel is limited
- Sections of wire rope at or near terminal ends where
corroded or broken wires may protrude
- Boom sheaves, hook block sheaves, gantry/mast
sheaves, boom extension/jib sheaves, jib strut
sheaves, and hoist drums
NOTE: Damaged sheaves or hoist drums can accelerate
wear and cause rapid deterioration of the wire
rope.
Any wire rope damage found must be recorded and a
determination made as to whether continued use of the rope
is safe. Refer to the Replacement Criteria
topic.
Determining Frequency of Inspection
Intervals for comprehensive inspections may vary from
machine to machine. The inspection interval must be
determined by a qualified person and be based on factors
such as the following:
• Expected rope life as determined by experience on the
particular installation or similar installations
• Size, nature, and frequency of lifts
• Rope maintenance practices
• Severity of the environment, such as the following
conditions:
- Variation in temperature
- Continuous excessive moisture levels
- Exposure to corrosive chemicals or vapors
- Wire rope to subject to abrasive material
- Power line contact
FIGURE 5-6
Item Description
1 Dog-Leg or Kink
2 Drum Abrasion
3 Drum Crushing
4 Sheaves Too Small
5 Corrosion
6 Bird Cage (sudden release of load)
M100655a-f
1
2
3
4
5
6
DANGER
Falling Load Hazard
• As a wire rope approaches the end of its useful life,
inspections should be performed more frequently.
• All wire rope will eventually deteriorate to a point
where it is no longer usable.
• A comprehensive inspection of each wire rope must
be performed at least once a year.