Maeda MC405C-3 - Crane Operations; Pick & Carry Operation

Section 4 – DESCRIPTION ON OUTRIGGER AND CRANE SAFETY DEVICES Mini-Crawler Crane M A E D A
4-34 1/2019 MC405C-3
Crane Operations
Standard Operation Sequence,
Machine Status
Display and Warning Activation of Safety Devices
Take Pick & Carry posture.
• Raise the boom to about 65
degrees
• Slew the boom to the front
centre
• Pick & Carry switch: "ON"
• Stow the outriggers
• Travelling lock lever at "Travel"
position
• Boom stowing lamp on display
panel ON
Moment limiter
• Restricts the boom slewing,
angle, and telescoping
If the machine is not in Pick &
Carry posture
• Boom stowing lamp on display
panel (red) flashes
• Alarm buzzer sounds
continuously
• Working status lamp (red) ON
• Display panel indicates "E-P"
When the machine tilts for 3
degrees or more
• Warning buzzer sounds
continuously
Crane inclination alarm device is
activated
Pick & Carry Operation
Standard Operation Sequence,
Machine Status
Display and Warning Activation of Safety Devices
Perform crane operations.
• Work selector switch: "Crane"
• Operate crane operation levers
• Boom stowing lamp on display
panel ON
• Actual work is compared to the
rated total load, and the
working status lamp lights up
according to the load factor
• Working status lamp lights up
by load factor
• 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
• Restricts the boom slewing,
angle, and telescoping.
• Stops hook raising, boom
extending, and boom lowering
operations if the load factor
reaches 100 % or more
(overloaded)
When winching excessively
• Alarm buzzer sounds
continuously
Over winding detector is activated
Winch winding operation stops
When the machine tilts for 3
degrees or more during crane
operation
• Warning buzzer sounds
continuously
Crane inclination alarm device is
activated