Rigging work
12.9 Rigging work on the main boom
Operating manual GMK 6400 3 112 993 en 12 - 127
12.07.2013
If only one lifting limit switch has been
installed
• Check whether the bridging plug is in the
socket that is not being used.
If, for example, the lifting limit switch (3) is
installed on the left, the bridging plug (2) must
be in the socket (1) on the right.
Otherwise the movements
Raise hosting gear,
Telescope out and Lower the boom will be locked.
• Check whether the lock on the lifting limit
switch (3) is released;
à Unlocking,
p. 12 - 131.
If two lifting limit switches have been
installed
• Lock the lifting limit switch to which no
lifting limit switch weight has been
attached.
If the lifting limit switch weight has, for
example, been attached to the left lifting limit
switch (1), you must lock the right lifting limit
switch (2);
à Locking, p. 12 - 131.
Otherwise the movements
Raise hosting gear,
Telescope out and Lower the boom will be locked.
H
If two hoist ropes are reeved, you must also use two lifting limit switch
weights. In this case, both lifting limit switches must be unlocked;
à Unlocking, p. 12 - 131.
s
S
Risk of damage if the lifting limit switch is locked!
The lifting limit switch must not be locked. Remove the lock, if necessary.
If the lifting limit switch is locked, the hook block could hit the bottom of the
main boom head during the lifting procedure, resulting in damage to the
hook block, main boom head and hoist rope.
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