Mini-Crawler Crane M A E D A Section 4 –
DESCRIPTION ON OUTRIGGER AND CRANE SAFETY DEVICES
1/2019 MC405C-3 4-31
Crane Operations
Standard Operation Sequence,
Machine Status
Display and Warning Activation of Safety Devices
Perform crane operations.
• Work selector switch "Crane"
• Crane operation with levers
• Boom stowing lamp on display
panel OFF
• Actual work and the rated total
load are compared, and the
working status lamp lights up
according to the load factor.
• Load factor for illuminating
working status lamp
• Load factor less than 90 %:
Working status lamp (green) ON
• Load factor 90 to less than
100 %: Working status lamp
(yellow) ON, alarm sounds.
• Load factor 100 % or more:
Working status lamp (red) ON,
alarm sounds continuously.
Moment limiter
• When the load factor
reaches 100 % or more
(overloaded), hook raising,
boom extending, and boom
lowering operation stop.
When one of the outriggers go up
in the air during crane operation
• Setting lamps (red) on display
panel flash
• If any of the extension lamps
and setting lamps (total of
eight) goes off, hook raising,
boom extending, and boom
When the hook was raised
excessively
• Alarm buzzer sounds
continuously
activated.
Hook raising operation stops.
When the hook was lowered
excessively
• Alarm buzzer sounds
continuously
detector is activated.
Hook lowering operation
When the machine tilts for 3
degrees or more during crane
• Alarm buzzer sounds
continuously
Crane inclination alarm device
is activated
Crane Stowing Operation
Standard Operation Sequence,
Machine Status
Display and Warning Activation of Safety Devices
Operate the machine to take the
boom stowing posture.
• Fully retract the boom
• Boom horizontal stowing position
• Boom slew and stow position
• Boom stowing lamp on display
panel ON
Outrigger interlock device
• If the boom stowing lamp
(green) does not light up, all
the outrigger operations
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