Manitowoc MLC300 Service And Maintenance Manual

Reference Only
BOOM MLC300 SERVICE/MAINTENANCE MANUAL
4-8
Published 11-22-17, Control # 257-02
Replacement Specifications
Any strap not within specifications listed Table 4-1 in must be
replaced.
Table 4-1. Strap Specifications
Corrosion or Abrasion
See Figure 4-8 for the following procedure.
1. For quick identification by repair workers, clearly mark
damaged areas with brightly colored tape.
2. Sandblast to remove corrosion. Do not grind!
3. Determine the reduction in the cross-sectional area.
4. If the reduction is less than 3% of the strap’s cross-
sectional area, paint the strap to maintain a continuous
protective coating.
5. If the reduction is 3% or more of the strap’s cross-
sectional area, remove the strap from service.
WARNING
Falling Attachment Hazard!
If damage to the strap exceeds that allowed within
specification, do not operate the crane until the strap has
been replaced.
Operating the crane with a damaged strap can cause
structural failure or collapse of the boom, jib, mast, or
other crane components.
Condition Reference
Allowable
Tolerance or
Deviation
Corrective Action
Dent
Figure 4-7
View A
< 3% of strap
thickness
Monitor condition
≥ 3% of strap
thickness
Remove strap from
service
Crack or
Break
Figure 4-7
View B
None
Remove strap from
service
Kink
Figure 4-7
View C
None
Remove strap from
service
Corrosion or
Abrasion
Figure 4-8
<3% of strap
cross-
sectional
area
Sandblast and
paint to maintain
continuous
protective coating
≥3% of strap
cross-
sectional
area
Remove strap from
service
Straightness
(gradual or
sweeping
bend)
Figure 4-9 Table 4-2
Remove strap from
service if deviation
exceeds maximum
allowed
Flatness
(includes
twisted
straps)
Figure 4-10 Table 4-3
Remove strap from
service if deviation
exceeds maximum
allowed
Elongated
Holes
Figure 4-11
None
Remove strap from
service
Length
Figure 4-12
None
Remove strap from
service
< = less than
≥ = equal to or greater than
Dent
Depth
of Dent
Kink
Do not straighten or bend into
alignment. Remove from service.
Crack or
Break
Do not weld. Strap cannot be
repaired. Remove from service.
View A
View B
View C
FIGURE 4-7

Manitowoc MLC300 Specifications

General

Brand	Manitowoc
Model	MLC300
Category	Construction Equipment
Language	English