Malfunctions during crane operation
14.5 Emergency operations and programs
Operating manual 3 302 819 en 14 - 49
GMK3060
13.12.2018
For the MAXbase
slewing range
type
If the Standard slewing range type is activated; Ã p. 14 - 48.
Slewing is not monitored by the RCL in emergency operation.
Due to the wide variety of possible outrigger spans and the asymmetry,
the permissible slewing ranges cannot be representing as simple tables.
When slewing with the hand-held control is unavoidable
• Refer to the Lifting capacity table (provided in digital form only) for the slewing
ranges applicable to the current rigging mode.
• Note the slewing range divisions and the permissible (maximum and minimum)
working radii and lifting capacities for each.
Checking the RCL display
Check that the enabled slewing ranges and working radii specified in the Lifting
capacity table are correctly shown on the RCL display.
• Slew slowly towards a safe range and check that the current position (1)
changes accordingly.
• Derrick slowly towards a safe range and check that the current position (1)
changes accordingly.
– If the RCL display still displays correctly
You can use the RCL display for orientation while slewing and correct the work-
ing radius before reaching the slewing range limits.
– If the RCL does not display correctly
Slew slowly only and monitor the slewing range limits and working radius based
on the values specified in the Lifting capacity table. You may need to determine
the current position via measurements, depending on the availability of the
displays (slewing angle/working radius).
G
Risk of overturning when slewing in emergency operation!
Execute the measures described in this section before slewing and during slew-
ing. Special caution must be exercised with the MAXbase slewing range type
because several parameters must be monitored simultaneously.
If you have any doubts, contact
Manitowoc Crane Care.
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