Maeda MC405C-3 - Over Winding Detector

Section 4 – MOMENT LIMITER (OVERLOAD DETECTOR) Mini-Crawler Crane M A E D A
4-80 1/2019 MC405C-3
3. Limit Warning
• The appropriate working envelope
restriction LED (orange) lights up.
• Red of the working status lamp lights up.
• The alarm bleeps continuously.
• The hazardous operation of the boom
stops automatically.
Over Winding Detector
CAUTION: Pay attention to the distance
between the hook and boom when raising the
hook.
Extending the boom also raises the hook.
Always check the hook height when
extending the boom.
When you over-wind the hook when raising the
hook or extending the boom,
• The "Over-winding" LED (red) flashes.
• The alarm bleeps continuously.
• The hook raising and boom extending
operation stop automatically.
• The voice saying "hook is overwinded" is
heard.
In case of auto stop, immediately perform the
recovery operation.
Perform hook lowering and boom retracting
operations as recovery operations.
Fig. 4-207
Fig. 4-208
1 - Hook block
2 - Over winding detector
3 - Weight
4 - Boom
When the hook block (1) was raised or the boom
(4) was extended, the over winding detector
activates the buzzer to warn the operator of
overwinding if the hook block (1) approached the
end of the boom (4) and pushed up the weight
(3).
At the same time, the raising of the hook block
(1) and the extension of the boom (4) stop
automatically.
When a warning buzzer sounds, operate the
winch lever immediately to the "LOWER" side or
operate the boom telescoping lever to the
"RETRACT" side to lower the hook block (1).