Section 4 – MOMENT LIMITER (OVERLOAD DETECTOR) Mini-Crawler Crane M A E D A
4-80 9/2020 MC285CB-3
Lever detection display
When crane lever operation is detected, lever
detection indication on the monitor lights up in
green.
Fig. 4-201
Slew origin detection display
When slew position is close to 0 degree and 180
degree, slew origin detection on the monitor lights
up in green.
Fig. 4-202
Over Winding Detector
CAUTION: Sudden Movement Hazard. Always
pay attention to the distance between the
hook block and boom when raising the hook.
Extending the boom also raises the hook
block. Always check the hook block height
when extending the boom.
When the hook is overwound, raised or the boom
is extended:
Fig. 4-203
1 - Hook Block
2 - Over Winding Detector
3 - Weight
4 - Boom
If the hook block (1) is raised or the boom (4)
extended, the over winding detector (2)
intermittently activates the alarm buzzer to warn
the operator of overwinding if the hook block
approaches the end of the boom and pushes up
the weight (3).
At the same time, the raising of the hook block and
the extension and raising of the boom stop
automatically.
When an alarm buzzer sounds, move the winch
lever immediately to LOWER or move the boom
telescoping level to RETRACT to lower the hook
block.
For more information on control during stoppage
caused by over winding, see “Over Winding
Detector” on page 4-72.
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