M A E D A Mini-Crawler Crane Section 4 – MOMENT LIMITER (OVERLOAD DETECTOR)
9/2020 MC285CB-3 4-83
Setting/Resetting Slewing Angle Limits
When the slewing angle is in the advance warning
area or at the stop position in a condition in which
the slewing angle limit is set, the monitor display
flashes in orange.
Fig. 4-207
Setup
Slew the boom to the desired angle in a condition
in which no slewing angle limit is set, and press
the switch. Once the switch is pressed, the yellow
display appears and clockwise (right) or
counterclockwise (left) slewing can be selected.
Each time the switch is pressed, the slewing
direction changes. Select the yellow indicator for
the direction to be set, and hold the switch.
The angle limit value on the monitor display
changes to the orange colour and the slewing
angle is set as the limit value.
NOTICE:
• Be sure to check, before actual work, that the
boom automatically stops at the set working
radius. If the boom does not automatically stop,
reset the working radius in the above steps.
• An alarm sounds intermittently if the boom is
slewed to the right in the prediction alarm zone
when the clockwise slewing angle limit has been
set. An alarm sounds continuously if the boom is
slewed to the right in the slewing stop position.
• An alarm sounds intermittently if the boom is
slewed to the left in the prediction alarm zone
when the counterclockwise slewing angle limit
has been set. An alarm sounds continuously if
the boom is slewed to the left in the slewing stop
position.
• The set value is memorised when the starter
switch is turned to the “OFF” position.
Cancel
Press the switch in a condition in which the
slewing angle is set. The orange display section
can be selected in yellow. Each time the switch is
pressed, the selection changes. Select the yellow
indicator for the direction to be cleared, and hold
down the switch. The monitor display changes to
blue, indicating that the slewing angle limit setting
has been cleared.
Moment Limiter Override Switch
DANGER!:
The moment limiter override switch disables
ALL safety features, ALL limits and ALL
automatic stops of the Moment Limiter Digital
Load Safety System.
When this switch is turned to the “ON”
position (OVERRIDE), all the Moment Limiter’s
interlocked automatic safety/ stop /limit
features become INACTIVE & DISABLED. All
crane operations in this situation are
unprotected by the Moment Limiter system.
The risk of a crane accident increases greatly
without the use of the Moment Limiter system.
The Moment Limiter system is a safety aid to
the operator, not a tool or excuse for poor and
dangerous crane operation.
With or without the protection of the Moment
limiter system, crane operation outside of the
parameters of the Rated Total Load Chart(s),
unsafe operations beyond accepted safe
crane practices and proper crane operation
technics may result in dropping of a hoisted
load, breakage of crane components or the
machine tipping over. A serious accident
resulting in death or serious injury may occur.
Use this switch only in the case of an
emergency due to failure of the Moment
Limiter system, and or machine maintenance /
service when any crane travel, lifting
operations are not being performed.
Do not store the override key permanently in
the moment limiter override switch box.
Fig. 4-208
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