Manitowoc Grove GMK 4100L-1 Maintenance Manual page 68

Maintenance overview
5.3 Periodic inspections
5.3.1
G
5 - 20
Load hook inspection
The hook opening on the load hooks must be checked regularly for
deformation.
The hook opening must not have increased by more than 10% of the original
dimension y, y1, y2.
Risk of accidents due to the load falling.
Hook blocks with deformed load hooks are no longer safe to use.
The load hooks could break and drop the load.
Deformed load hooks must always be replaced.
The original dimensions y, y1, y2 are specified
in field (2) on the load hooks.
•
To check this, measure the distance
between the marked measuring points on
the load hook shaft (1) and the tip of the
hook (3).
The hook block may no longer be used if the
opening has increased by more than 10%
of its original dimension.
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GMK 4100L-1