Maeda MC815C, Operation Manual, Page: 163 / 426

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2.14 OUTRIGGER SETTING OPERATION
• GROUND FOR SETTING OUTRIGGERS
Always place the outriggers on a level, stable and solid ground.
Attempting to work with the crane without setting the outriggers may cause the machine to
overturn.
• OUTRIGGER SAFETY DEVICE
Before operating any outrigger, be sure to set the emergency stop switch to the “OFF”
(cancel) position.
Do not attempt to operate the machine when the emergency stop cancel switch is in the “ON”
(cancel) position
Do not turn the emergency stop cancel switch to the “ON” (cancel) position except in a safety
device failure or in conducting a load test
If the emergency stop cancel switch is turned to the “ON” (cancel) position, a warning buzzer
sounds intermittently.
• EXTENDING AND SETTING THE OUTRIGGERS
• Do not let people approach the machine when setting the outriggers.
Close proximity to the machine may cause serious accidents such as getting caught
between the outrigger and the machine main unit.
• When setting the outriggers, the machine must be set level using the leveling instrument.
If the machine tilts at an angle of “3 degrees” or more, the overturn warning buzzer sounds.
• The outriggers must be set so as to provide a clearance of approx. 50 mm between the
crawler belts and the ground.
After setting, Make sure that all 4 outriggers are securely settled on the ground.
• The machine can be operated in various situations due to the outriggers that can be freely
set according to the shape of the surface where the machine is operated. However, if the
machine cannot be operated with the “outriggers fully extended”, operate it by referring the
values given in Rate Total Load Chart: “Rated Total Load Chart with outrigger extended
medium” or “Rated Total Load Chart with outrigger extended minimum”.
• When extending and setting the outriggers, be sure to maintain the outrigger rotaries at the
extension position, and insert each positioning pin as far as it will go. Do not set the
outriggers with the outrigger rotaries stowed.
• There are 4 outriggers. Each outrigger has its own switch. Be careful not to confuse the
outrigger switches when setting the outriggers. Check both the outrigger numbers
indicated in the “control panel” of the switch and “number labels” attached to each
outrigger. If these are mistakenly operated, it may cause a serious accident.
• When you operate two outrigger switches at one time, only the two switches for the front
outriggers ([(1)] and [(4)]), or the two for the rear outriggers ([(2)] and [(3)]) can be operated
simultaneously. Simultaneous operation of the two switches for the outriggers on either left
or right side will cause the outriggers on one side to leave the ground abruptly. This will
result in overturning of the machine.
• When providing a clearance between the machine and the ground, operate the outrigger
switches independently so that individual outriggers can be equally extended and set in
stages. If two outriggers on either left or right side rises abruptly at the same time,
overturning of the machine may result.
• During outrigger switching operation, always keep the engine at lower speed.
When the engine is at high speed, the outriggers move too quickly which may result in
serious accidents including tipping of the machine.
• Do not “attempt to extend” any outriggers when they are grounded. Doing so may cause
damage to outriggers due to the excessive force that is applied to them.
• Before operating an outrigger, be sure to shift the lock lever into the free position.
CAUTION
• Before operating an outrigger, be sure to move the boom to the “lowest, full retracted,
and slewing stowage” position.
The outriggers cannot be operated unless the boom is completely stowed. (Make sure
that the crane stowage lamp on the monitor is lit in yellow.)
• After the outriggers are extended, check if all outriggers are securely settled on the
ground.
All crane operations cannot be performed unless all outriggers are securely
grounded. (Make sure that all outrigger extension lamps and outrigger grounding
lamps on the monitor are lit in yellow.)