Mini-Crawler Crane M A E D A Section 4 –
DESCRIPTION ON OUTRIGGER AND CRANE SAFETY DEVICES
1/2019 MC405C-3 4-29
DESCRIPTION ON OUTRIGGER AND CRANE SAFETY
DEVICES
Outrigger Safety Devices
Functions of Outrigger Safety Devices
The outrigger safety devices have the interlock functions shown in the table below.
Description of Interlock Function
1 Outrigger Interlock
The outrigger is not enabled if the position pin is not inserted properly by rotating the
outrigger rotary to extension side (outward) with the boom being stowed (boom lowered to
maximum, slewed and stored).
• Whether the boom is lowered to the maximum is verified by the detection switch located
to the post.
• Install a protrusion on the post at the boom slew and stow position and a detector switch
on the travelling dolly in order to detect whether the boom has stopped at the slew and
2 Crane Interlock
The crane operation (telescoping, raising/lowering hook, derricking, and slewing) is enabled
only when all the four outriggers are extended and set (overhung and grounded).
The outrigger extension status is detected as follows.
• Install a detection switch at the position pin section of the outrigger rotary to detect the
insertion of the position pin into the extension position.
• Install a detection switch inside the outrigger inner box to detect if the tray is seated
properly through the detection pin installed between the tip of the inner box and the tray.
CAUTION:
• Set the outriggers in the extension status and operate the work selector switch in the
outrigger operation panel to the "Crane" position to enable the crane operation.
When the detection condition for setting one of the four outriggers (see the item 2 in the table
above) is no more fulfilled, the working status lamp (red) rotates and lights up, and outrigger
un-set warning lamp (red) flashes.
If this state remains for 3 seconds or more, the crane interlock function is activated and the
crane operation will be disabled.
• Stow the crane and operate the work selector switch on the outrigger operation panel to the
"Outrigger" position to enable the outrigger setting and extension operations.
Please contact us or our sales service agency.
• If the crane operation is not enabled after operating the work selector switch on the outrigger
operation panel to the "Crane" position even after the outrigger is being extended and set,
there may be faulty adjustment or failure in the outrigger safety device.
Please contact us or our sales service agency.
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.
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