Section 4 –
DESCRIPTION ON OUTRIGGER AND CRANE SAFETY DEVICES
Mini-Crawler Crane M A E D A
4-28 3/2019 MC305C-3
WARNING! 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 travelling operation
The columns of the table below are described below.
Standard Operation Sequence,
Machine Status
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.
Check before Setting Outriggers
Standard Operation Sequence,
Machine Status
Activation of Safety Devices
• Start the engine
• Travelling 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.
Outrigger Setting Operation
Standard Operation Sequence,
Machine Status
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 grounding 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
Crane Operation
Standard Operation Sequence,
Machine Status
Activation of Safety Devices
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