Malfunctions during crane operation
14.5 Emergency operations and programmes
Operating manual GMK 6400 3 112 993 en 14 - 45
12.07.2013
H
In the Telescoping emergency programme, all functions for retracting the
main boom remain enabled as long as there are no other errors (hydraulic
or mechanical).
The speed is restricted to approximately 30% of the maximum speed.
– When an error occurs on the proximity switch;
à p. 14 - 49
– If there is an error on the length indicator;
à next section
Error on length
indicator
First register the current status of the telescoping mechanism.
• Check the positions of the locking pins as
usual, i.e. on the displays (1) and (2).
• Check whether the display (3) shows the
RCL measured value for the extended length
of the telescoping cylinder.
• Check the telescoping on the RCL.
s
G
Risk of damage to the main boom
Never telescope the main boom if there is an error on the length indicator
and on the proximity switch at the same time.
It would then not be possible for you to monitor operations, and compo-
nents in the main boom could be damaged, or a situation could arise in
which the main boom can no longer be extended or retracted.
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