Maeda MC-305C-2 - Outrigger Safety Devices; Functions of Outrigger Safety Devices

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1.5 OUTRIGGER SAFETY DEVICES
1.5.1 FUNCTIONS OF OUTRIGGER SAFETY DEVICES
The outrigger safety devices have the interlock functions shown in the table below.
Interlock
Function
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 traveling dolly in order to detect whether the boom has
stopped at the slew and stow position.
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.
• 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 ask us or our sales service agency for repair.