Malfunctions during crane operation
14.5 Emergency operations and programs
Operating manual 3 302 819 en 14 - 35
GMK3060
13.12.2018
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 about 30% of the maximum speed.
In the case of an
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.
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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 components 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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