Reference
Only
Manitowoc
Published 05-16-17, Control # 233-03
4-11
999 SERVICE/MAINTENANCE MANUAL
BOOM
4
STRAP INSPECTION AND MAINTENANCE
This section is a guide to crane owners for properly
inspecting and maintaining straps in the field. It is impossible
to predict whether or when a strap may fail. Frequent and
periodic inspections can help reveal potential for failure.
Straps are to be inspected regularly by a
qualified person
as part of crane’s preventive maintenance program. Dated
records should also be kept.
St r a p r e p a i r s a r e p r o h i b i t e d
.
P e r f o r m o n l y t h e
maintenance indicated in this section. For inspection
procedures not covered in this manual, contact your dealer
or the Manitowoc Crane Care Lattice Team.
Strap connecting links are subject to same inspection
procedures and replacement specifications as those for
straps. In this section,
strap
means straps and connecting
links.
Inspection
Regular inspection of all straps is necessary to assure that
crane can lift its rated load. If a strap fails, boom or other
attachment can collapse. All inspections must be performed
by a qualified appointed inspector at following intervals:
•
Routinely on a daily (frequent inspection) or monthly
(periodic inspection)
•
Before initial use
•
After transport
•
After an overload or shock loading has occurred
•
If boom and/or jib has come into contact with another
object (for example, power lines, building, another
crane)
•
If boom or jib has been struck by lightning
Daily Inspection
Visually inspect all straps once each work shift for obvious
damage which 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, strap must be
checked to make sure it is within specifications given in this
section.
Monthly Inspection
Periodic inspection must be performed at least monthly.
During this inspection, entire length of strap must be
inspected to assure that it is within specifications.
Strap
must be within all specifications identified in this
section
.
Any damage found must be recorded and a
determination made as to whether continued use of strap is
safe.
Before beginning inspection, thoroughly clean strap of all
dirt, grease, oil, etc. 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 interval for periodic
inspection depending on following factors:
•
Severity of environment in which crane is operated
•
Size, nature, and frequency of lifts
•
Exposure to shock loading or other abuse
Cranes Not in Regular Use
A qualified inspector should determine 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, part number is stamped into both
ends of each strap as shown in
.
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 4-8
XXXXXX
Part Number
A1012
Summary of Contents for 999
Page 1: ...R e f e r e n c e O n l y Service Maintenance Manual Manitowoc 999 ...
Page 2: ...R e f e r e n c e O n l y ...
Page 4: ...R e f e r e n c e O n l y THE ORIGINAL LANGUAGE OF THIS PUBLICATION IS ENGLISH ...
Page 297: ...R e f e r e n c e O n l y ...
Page 298: ...R e f e r e n c e O n l y ...