Crane operation
10.1 Before operating the crane
10 - 16 3 302 633 en Operating Instructions GMK5250L
27.09.2017
Locking the
superstructure
The superstructure needs to be at one of the locking points (0° or 180°).
• Select the symbol (5).
• Press the button until the symbol (4) is
displayed –
Superstructure locked.
The display changes from symbol (1) to sym-
bol (2) and shows symbol (6) when the super-
structure is locked.
If the error symbol (3) is displayed, contact
Manitowoc Crane Care.
Unlocking the
superstructure
The RCL shutdown procedure will be triggered and slewing disabled if you
unlock the superstructure when an RCL code for 0° to the rear has been
entered. To acknowledge the shutdown procedure, you must either lock the
superstructure or set down the load and enter an RCL code for a working
range of 360°.
• Select the symbol (5).
• Press the button until the symbol (4) is
displayed –
Superstructure unlocked.
The display changes from symbol (1) to sym-
bol (2) and shows symbol (6) when the super-
structure is unlocked.
If the error symbol (3) is displayed, contact
Manitowoc Crane Care.
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