Manitowoc Grove GMK4100L-1 Operating Manual page 867

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Operating manual
GMK4100L-1
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.
3 302 690 en
12.10 Rigging work on the main boom
If only one lifting limit switch has been
installed
•
Cover the unused socket with the protective
cap (2).
•
Check whether the lock on the used lifting
limit switch, e.g. (1), is released;
à
Removing the lock , p. 12 - 125.
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 exam-
ple, been attached to the left lifting limit
switch (1), you must lock the right lifting limit
à
Locking , p. 12 - 125.
switch (2);
Otherwise the movements Raise hosting gear ,
Telescope out and Lower the boom will be locked.
Rigging work
s
12 - 121