Rigging work
12.9 Rigging work on the main boom
Operating manual GMK 6400 3 112 993 en 12 - 131
12.07.2013
12.9.6 Locking/Unlocking the lifting limit switch
Locking If a hoist rope has been reeved and two lifting limit switches are installed,
you must lock the lifting limit switch not used in order to enable all crane
operations.
• Remove the lifting limit switch weight.
• (A) – Remove the cap (1).
• Pull down the rope (2).
• (B) – Secure the rope (2) in this position
using the cap (1) – the lifting limit switch is
locked and can no longer be triggered.
Unlocking You must always remove the lock before you place a lifting limit switch
weight around the hoist rope.
• (A) – Pull the rope (2) down and take off the
cap (1) – the lock is removed.
• (B) – Fit the cap (1) onto the lifting limit
switch.
S
Risk of damage if the lifting limit switch is locked
The lifting limit switch to which the lifting limit switch weight is attached
may under no circumstances be locked when operating the crane.
If the lifting limit switch is locked, release the lock.
This prevents the hook block from hitting the main boom head, causing
damage to the hook block, main boom head and hoist rope.
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