Malfunctions during crane operation
14.5 Emergency operations and programs
Operating manual 3 302 709 en 14 - 35
GMK5150L
12.01.2018
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.
Error at the
length indicator
First register the current status of the telescoping mechanism.
• Check the positions of the locking pins as
usual, i.e. at the symbols (1) and (2).
• Check that the display (3) shows the RCL
measured value for the extended length of
the telescoping cylinder
.
s
G
Risk of damage to the main boom
Never telescope the main boom if at the same time there is an error at both
the length indicator and the proximity switch.
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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