Maeda MC285C-3 - Crane Operations; Crane Stowing Operations

M A E D A Mini-Crawler Crane Section 4 – CRANE SAFETY DEVICES
1/2019 MC285C-3 4-53
Crane Operations
The columns of the table are described below.
Standard Operation Sequence,
Machine Status
Display and Warning
Activation of Safety Devices
This field shows the standard operation
sequence and the operation position of
operation levers and switches, and
machine status.
This field shows the display and warning
issued as a result of the operation.
This field shows the name of the safety
device that prevents the resulted error and
its action.
Perform crane operations.
• Travel lever in Crane/Outrigger
• Crane operation with levers
• Boom Stowing Light on the monitor off
(besides BOOM STOWING position)
• Actual work and the rated total load are
compared, and the Working Status
Lamp flashes according to the load
factor.
• Load factor for flashing Working Status
Lamp
• Load factor less than 90%: Working
Status Lamp (green) flashes.
• Load factor 90% to less than 100%:
Working Status Lamp (yellow)
flashes, alarm sounds intermittently.
• Load factor 100% or more: Working
Status Lamp (red) flashes, alarm
sounds continuously.
Moment limiter:
When the load factor reaches 100% or
more (overloaded), hook raising, boom
extending, boom raising and boom
lowering operations stop.
When one of the outriggers goes up in the
air during crane operation
Ground Set-Up Lights (red) on the monitor
flash
–
When two or more adjacent outriggers lift
up during crane operation
Ground Set-Up Lights (red) on the monitor
flash
Boom extending, hook raising, boom
raising, boom lowering, and slewing
operations stop.
When the hook is raised excessively
Alarm buzzer sounds continuously
Over winding detection function is
activated. Hook raising operation stops.
When the hook is lowered excessively
Alarm buzzer sounds continuously
Rope warning is activated.
When the machine tilts 3 degrees or more
during crane operation
Alarm buzzer sounds continuously
Hook lowering operation stops.
Crane Stowing Operations
Standard Operation Sequence,
Machine Status
Display and Warning
Activation of Safety Devices
This field shows the standard operation
sequence and the operation position of
operation levers and switches, and
machine status.
This field shows the display and warning
issued as a result of the operation.
This field shows the name of the safety
device that prevents the resulted error and
its action.
Operate the machine to take the boom
stowing posture.
• Fully retract the boom
• Boom horizontal stowing position
• Boom slew and stow position
Boom Stowing Light (green) on the
monitor on
Outrigger interlock device:
If the Boom Stowing Light (green) does not
turn on, all the outrigger operations stop.