Rigging work
11.10 Rigging work on the main boom
Operating Instructions GMK5250L 3 302 633 en 11 - 125
27.09.2017
11.10.8 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.
Removing the lock You must always release the locking 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 locking is released.
• (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 hitting the main boom head, causing damage
to the hook block, main boom head and hoist rope.
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