Mini-Crawler Crane M A E D A Section 4 – FLY-JIB MOMENT LIMITER CONTROL
1/2019 MC405C-3 4-171
Mode (Wire fall indicator LED (2)
combination)
Fig. 4-510
NOTICE: In fly-jib mode, Boom length display (3)
indicates "boom length" and "Jib", alternately.
Now fly-jib operation is ready for operation.
WARNING! Always fully extend two stages of
fly-jib in use, because moment limiter's fly-jib
mode computes working radius and lifting
height on basis of full length and so
indicated.
Hence, it fails to indicate correct working
radius in the event that fly-jib is retracted;
that may result in a serious accident.
Instruction for Operation
DANGER! Fly-jib operation causes a bigger
risks of tipping or bouncing of the load,
because the longer boom will be affected
more by inertia or wind.
Hence, fly-jib operation should be in
decelerated mode, and never in accelerated.
• Both manual operation lever and remote control
are available, also, as normal operation.
However, main-boom angle and length is
restricted for fly-jib operation.
• Rated total load for fly-jib operation is restricted
by main-boom angle, regardless of the length.
Fig. 4-511
[Operation range: 76 ° to 55°]
The warning signs below will appear to prohibit
operations out of the range.
Boom should be immediately restored to
operation range (72° to 57°).
[Indication]
• Rated load display of moment limiter will
indicate "E-J".
• Red light of rotary lamp will light and rotate.
• All the values will be off except Boom angle
display (1) (indicates angle) and Rated load
display (2) (indicates error "E-J").
Fig. 4-512
NOTICE: All the values are off except Boom
angle display (1) and Rated load display (2)
when boom angle is out range. (They resume
when the boom returns to range.)
• Boom raising over 76° is prohibited. (Boom
angle upper limit LED (3) flashes when
exceeding 76°.)
• Boom lower and extend under 55° (at boom
length 12.5 m or longer) is prohibited. (Boom
lower limit LED (4) flashes below 55°.)
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