Manitowoc Grove GMK 4100L-1, Operating Manual

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Crane operation
11.5 Crane operation with main boom
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GMK4100L-1
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3
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1.
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7
Checking the
wind speed Strong winds can result in the truck crane becoming overloaded.
•
Prior to and during crane operation, check whether the current wind
speed is lower than the maximum permissible wind speed.
The display ( 1 ) shows the current wind speed.
The maximum permissible wind speed ( 2 ) or
the reduced wind speed ( 3 ) specified in the
lifting capacity table applies to the confirmed
rigging mode.
The display ( 1 ) flashes in colour in the vicinity
of the maximum permissible value v
max
( 2 )
or ( 3 ).
If an anemometer is not available, or in the event of a fault, you can find out
which speeds are forecast by contacting the relevant weather stations.
The lifting capacity table contains an overview of the wind strengths, wind
speeds and their effects.
If the maximum permissible wind speed is exceeded
No automatic shutdown occurs if the maximum permissible wind speed is
exceeded.
•
Immediately stop crane operation.
•
Put the truck crane into the rigging mode specified for the current wind
speed in the
lifting capacity table
.
– Yellow: approx. 90-100% of v
max
reached
– Red: v
max
exceeded
G
Risk of accidents due to excessively high wind speeds!
If the current wind speed is higher that the maximum permissible wind
speed, stop crane operation immediately and set up an appropriate rigging
mode.
This will prevent the truck crane from overturning due to overload.