Rigging work
12.10 Rigging work on the main boom
Operating manual 3 302 690 en 12 - 125
GMK4100L-1
23.11.2017
12.10.8 Locking/unlocking the lifting limit switch
Locking If 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 the rope (2) down; the lifting limit switch
is triggered.
• (B) – Secure the rope (2) in this position
using the cap (1) – the lifting limit switch is
locked.
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
If the lifting limit switch on which the lifting limit switch weight hangs 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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