Manitowoc Grove GMK6300L Operating Manual page 951

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Operating Manual GMK6300L
Retracting and locking a telescopic section
During telescoping you may not select Lock. Under no circumstances
should you press the button (2).
Risk of damage to the main boom!
If you select Lock during telescoping, the locking pins on the telescopic sec-
tion are slid out immediately and they can damage or tear the electrical or
hydraulic components in the main boom.
Unlocking the telescoping cylinder
If the telescopic section is locked, you can now unlock the telescoping
cylinder.
Risk of accidents from sudden retraction of a telescopic section!
+
Press the button for unlocking the telescopic section not more
than twice. If this does not start the unlocking procedure, contact
Manitowoc Crane Care.
14.5 Emergency operations and programs
•
Retract the telescopic section slowly and as
far as possible.
•
Press the button (2) once.
•
Extend to approx. 35 mm (0,11 ft).
The telescopic section is now locked. In Locked
position:
– the locking pins (3) are green,
– the symbol (1) is grey,
– the symbol (2) is yellow.
•
Set down the telescopic section and retract
it as far as it will go.
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Malfunctions during crane operation
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