Maeda MC815C, Operation Manual, Page: 160 / 426

150
2.13 OUTRIGGER/CRANE RELATED SAFETY DEVICES
Before operating the crane, be sure to understand the following operating procedures, the
alarm indications arising from the machine conditions detected by the safety devices, and the
detailed actions of shutdown operations. Bearing the above in mind, always ensure safety
when you operate the machine.
The table shown below explains the “indications and alarms” that may appear or go off under
normal use, and how the safety devices work with them.
The normal use mentioned above is as follows:
[1] Checking before setting outriggers
⇒
[2] Setting outriggers
⇒
[3] Operating crane
⇒
[4] Stowing crane
⇒
[5] Stowing Outriggers
⇒
[6] Driving machine
The details of the table are as follows:
Standard operating procedures/
Machine conditions
Indication and Alarm
Operation of safety
devices
This field describes the
procedures for normal operations,
the operating positions of the
control levers and switches, and
machine conditions.
This field lists the “indications”
and “alarms” as the result of
normal operations.
This field describes the
safety devices and their
actions to be taken as the
preventive measures
against abnormalities
arising from the normal
operations.
[1] CHECK OUTRIGGER PLACEMENT CONDITION
Standard operating procedures/
Machine conditions
Indication and Alarm
Operation of safety
devices
• Starting engine
• Lock lever position: Lock
Check if the boom is in stow
position
• Boom is fully retracted
• Boom is in horizontal stow
position
• Boom is in slewing stow position
• Crane stowage lamp lights up
[Tricolor revolving light (red)
lights up]
Outrigger Interlock
• If the crane stowage
lamp does not light up,
all outrigger operations
are brought to a stop
[2] OUTRIGGER SETTING OPERATION
Normal operating procedures/
Machine conditions
Indication and Alarm
Operation of safety
devices
Setting outriggers.
1. Extending outriggers.
• Rotate the outrigger rotaries
and secure them with
positioning pins to
predetermined places.
• Selecting outrigger mode
• Outrigger extension switch
[extension]
• Outrigger extension lamp lights
up
[Tricolor revolving light (red)
lights up.]
Outrigger Interlock
• If any one out of the
four outrigger extension
lamps does not light up,
all outrigger operations
are brought to a stop.
2. Setting the outriggers on the
ground
• Outrigger grounding switch
(extension)
• Check the surface for
horizontal with a leveling
instrument.
• Outrigger grounding lamp lights
up.
[Tricolor revolving light (red)
lights up.]
When the machine tilts at an
angle of 3 degrees or more while
outriggers are setting.
• Alarm buzzer constantly sounds Machine tilt detection
device activates