Malfunctions during crane operation
14.5 Emergency operations and programs
Operating Instructions GMK5250L 3 302 633 en 14 - 33
27.09.2017
Inspections prior to telescoping
• Before telescoping, check that the following conditions are met:
– The telescoping cylinder is at the locking
point and is locked, symbols (2) are green.
– The telescopic section is unlocked,
symbol (3) (select no more than 2 x),
symbols (1) are red.
Retracting and locking a telescopic section
During telescoping you may not select Lock. Under no circumstances select
and confirm the symbol (1).
s
G
Risk of accidents from sudden retraction of a telescopic section!
You can select and confirm the symbol for unlocking the telescopic section
only a maximum of 2 times. If this does not start the unlocking procedure,
contact
Manitowoc Crane Care.
S
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.
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