Section 4 – SEARCHER HOOK OPERATION Mini-Crawler Crane M A E D A
4-134 3/2019 MC305C-3
Fig. 4-389
DANGER! Do not use 850 kg searcher hook if
actual searcher hook offset position and
display of boom length window do not match.
Without setting moment limiter to the actual
searcher hook offset position, moment
limiter may not work properly and thus may
result in crane damage and machine trip that
may result in serious accidents.
11. Attach the load securely to the hook (12)
and start operations.
Fig. 4-390
DANGER! When hoisting a load in 850 kg
searcher hook mode, raise boom to hoist the
load off the ground, and stop for a while to
check if the load is safe to hoist.
NOTICE: Characteristic of moment limiter
display
• At certain working conditions, moment limiter
may display bigger load value than actual load.
• Sudden lever operation increases error in
reading load. When operating boom derricking
lever, move the lever slowly.
12. When operation is auto-stopped by
reaching overload during boom lowering or
extending operation, first retract boom to
recover into safe load range, and then lower
boom to ground load.
If boom lift must be operated in a situation,
use boom lift bypass switch (13) to enable
the boom lift function.
To operate boom lifting using this boom lift
bypass switch (13), keep pressing the
switch to upper side and operate boom lift at
the same time.
After the work, release the switch and it
automatically turns off.
Fig. 4-391
Fig. 4-392
DANGER! The boom lift bypass switch is to
be used only when in searcher hook mode.
The boom lift function is stopped
automatically when overloaded.
Never use this for normal lifting of loads
clear of ground. Hoisting a load off ground
by using this switch may cause damage to
the machine and serious accident.
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