Manitowoc Published 05-03-17, Control # 228-03 4-9
16000 SERVICE/MAINTENANCE MANUAL BOOM
STRAP INSPECTION AND MAINTENANCE
This section is a guide to properly inspect and maintain
straps in the field. It is impossible to predict when a strap
may fail. Frequent and periodic inspections can help reveal
potential failure. Straps must be inspected regularly by a
qualified person as part of the crane’s preventive
maintenance program. Dated records should also be kept.
Strap repairs are prohibited. Perform only the maintenance
indicated in this section. For inspection procedures not
covered in this Service Manual, contact your dealer or the
Manitowoc Crane Care Lattice Team.
Strap connecting links are subject to the same inspection
procedures and replacement specifications as those for
straps. In this section, the word “strap” refers to both straps
and connecting links.
Inspection
Regular inspection of all straps is necessary to assure that
the crane can lift its rated load. If a strap fails, the boom or
other attachment can collapse. All inspections must be
performed by a qualified appointed inspector at the following
intervals:
• As a part of a daily (frequent inspection) or monthly
(periodic inspection)
• Before initial use
• After transport
• After an overload or shock loading has occurred
• If the boom and/or jib has come into contact with another
object (for example, power lines, a building, or another
crane)
• If the boom or jib has been struck by lightning
Frequent Inspection
Visually inspect all straps once each work shift for obvious
damage that poses an immediate hazard. Pay particular
attention to areas where wear and other damage is likely to
occur. Look for straps that are disconnected, loose or
sagging excessively and for distortion such as kinking or
twisting. If any strap looks like it is damaged, the strap must
be checked to make sure it is within the specifications given
in this section.
Periodic Inspection
Periodic inspection must be performed at least monthly.
During this inspection, the entire length of the strap must be
inspected to ensure it is within specifications. The strap must
comply with all specifications identified in this section. Any
damage found must be recorded and a determination made
as to repair or replace.
Before beginning the inspection, thoroughly clean the strap
of all dirt, grease, oil, or other contaminants so a thorough
inspection can be made. Closely examine those areas where
paint is chipped, wrinkled, or missing and where faint rust
lines or marks appear.
A qualified inspector may modify the interval for periodic
inspection depending on the following factors:
• The severity of the environment in which the crane is
operated
• The size, nature, and frequency of lifts
• Exposure to shock loading or other abuse
Cranes Not in Regular Use
A qualified inspector should determine the type of inspection
required for cranes that have been idle. A frequent
inspection (visual observation) should be adequate for a
crane that has been idle for less than six months. A periodic
inspection is required for cranes that have been idle for more
than six months.
Identifying Straps
To aid in identification, the part number is stamped into both
ends of each strap as shown in Figure 4-10
.
WARNING
If strap damage was caused by overload or shock load or
if there is damage to other major structural components,
Manitowoc recommends that a thorough inspection be
made by a qualified person. A nondestructive test of all
critically stressed members must be made.
FIGURE 4-10
XXXXXX
Part Number
A1012
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