Malfunctions during crane operation
14.5 Emergency operations and programmes
14 - 42 3 112 993 en Operating manual GMK 6400
12.07.2013
Releasing the lock
• (A) – Extend about 35 mm (0.11 ft), so that
the cutout (4) is accessible.
• (B) – Screw a set screw into the bore (1). The
locking pins (2) must retract behind the tele-
scopic section (3).
If necessary, give the locking pin (2) a slight
knock to help this procedure.
• Unlock the other side of the telescopic sec-
tion as well.
Locking the telescopic section
• (A) – Retract until the locking pin (2) is in the
middle of the opening.
• Screw the set screw out of the bore (1) until
the locking pin is fully extended.
• Take the set screw out of the bore hole.
• (B) – Retract further until the telescopic sec-
tion is set down.
S
Risk of damage due to a mechanically released lock
Under no circumstances may you operate the telescoping cylinder as long
as the lock is mechanically released. Screw all set screws out of the bore
holes immediately after finishing the repair work.
This prevents damage to the telescoping cylinder and the locking system.
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