Crane operation
11.1 Before operating the crane
11 - 14 3 112 993 en Operating manual GMK 6400
12.07.2013
Locking the
superstructure
The superstructure needs to be at one of the locking points (0° or 180°).
• Press button (3) until symbol (1) turns green.
The display will first show symbol (4) in yellow
and when the turntable is locked, it will show
symbol (1) in green.
The locking pin bolt (2) always has the same
colour as the displayed symbol (1).
If the error symbol (5) is displayed, contact
Manitowoc Crane Care.
Unlocking the
superstructure
The RCL shutdown procedure will be triggered and slewing disabled if you
unlock the turntable when an RCL code for 0° to the rear has been entered.
To acknowledge the shutdown procedure, you must either lock the super-
structure or set down the load and enter an RCL code for a working range
of 360°.
• Press button (3) until symbol (1) turns red.
The display will first show symbol (4) in yellow
and when the turntable is unlocked, it will
show symbol (1) in red.
The locking pin bolt (2) always has the same
colour as the displayed symbol (1).
If the error symbol (5) is displayed, contact
Manitowoc Crane Care.
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