Maeda MC405C-3 - Page 222

Section 4 – SEARCHER HOOK OPERATION Mini-Crawler Crane M A E D A
4-146 1/2019 MC405C-3
10. With fall mode set as 850 kg searcher hook
mode, press fall mode/option selector switch
(24) and cancel switch (23) at the same time
for 2 seconds or more and shift to set actual
searcher hook offset position.
For correct setting, see "Searcher Hook
offset position and mode display in boom
length window" on page 4-143.
Pressing fall mode/option selector switch
(24) and cancel switch (23) at the same time
for 2 seconds or more shifts boom length
display in order of "SH1  SH2  SH3 
SH1 ・・・"
Fig. 4-419
Fig. 4-420
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 or machine tipping and could
cause a serious accident.
11. Attach the load securely to the hook (12) and
start operations.
Fig. 4-421
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 the load.
If boom lift must be operated due to the
situation, use boom lift bypass switch (11) 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. 4-422