Maeda MC-305C-2 - Description on Outrigger and Crane Safety Devices

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2.13 DESCRIPTION ON OUTRIGGER AND CRANE SAFETY DEVICES
Understand well the operation sequence below, warning display from the safety devices under
the corresponding machine conditions, and the details of operation stop. Keep these in mind
for safe operations.
The table below shows what kind of “display and warning” will be issued and the resulting action of the
safety devices when this machine is used in the standard condition.
The standard operation sequence shown here is as follows.
[1] Check before setting outriggers ⇒ [2] Outrigger setting operation ⇒ [3] Crane operation ⇒ [4] Crane
stowing operation ⇒ [5] Outrigger stowing operation ⇒ [6] Machine traveling operation
The columns of the table below 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.
[1] CHECK BEFORE SETTING OUTRIGGERS
Standard Operation Sequence,
Machine Status
Display and Warning Activation of Safety Devices
• Start the engine
• Traveling lock lever at
“LOCK” position
Check if the machine is in the
posture of stowing the boom
• Fully retract the boom
• Boom horizontal stowing position
• Boom slewing stowing position
• Boom stowing lamp on display
panel ON
[Outrigger un-set warning lamp
flashes]
[Working status lamp (red) ON]
Outrigger interlock device
• All the outrigger operations
stop if the boom stowing lamp
does not light up.
[2] OUTRIGGER SETTING OPERATION
Standard Operation Sequence,
Machine Status
Display and Warning Activation of Safety Devices
Set the outriggers.
1. Extend the outriggers.
• Rotate the outrigger rotary and
secure them at the specified
position with the position pin
• Work selector switch
“OUTRIGGER”
• Outrigger extension switches
“OUT”
• Extension lamps on display panel
ON
[Outrigger un-set warning lamp
flashes]
[Working status lamp (red) ON]
Outrigger interlock device
• All the outrigger operations
stop if one of the four
extension lamps does not light
up.
2. Set the outriggers.
• Outrigger setting switch “OUT”
• Check the level with the level.
• Setting lamps on display panel ON
[Outrigger un-set warning lamp
OFF]
[Working status lamp (red) OFF]
When the machine tilts for 3
degrees or more during outrigger
setting operation
•Warning buzzer sounds
continuously
Crane inclination alarm device
is activated