Maeda MC405C-3 - OUTRIGGER SETTING

Section 4 – OUTRIGGER SETTING Mini-Crawler Crane M A E D A
4-42 1/2019 MC405C-3
OUTRIGGER SETTING
WARNING! For more information on
precautions when setting up outriggers,
thoroughly check the items related to the
outriggers in "WORKING WITH CRANE" on
page 4-53.
CAUTION:
• Always keep the boom at the "fully
retracted, lowest position and slew and
store position" when operating the
outriggers. The outriggers cannot be
operated if the boom is not stowed
completely. (Verify that the boom stowing
lamp (green) on the outrigger display is
ON.)
• After extending the outriggers, verify that
the outriggers are securely set.
If all the outriggers are not securely set, the
crane operations will not be enabled. (Verify
that all of the extension lamps and setting
lamps (green) of the outrigger display are
lit.)
Outrigger Setting Precautions
Protecting Ground
Setting the outriggers on the soft ground as given
below will cause the tray of the outriggers to sink
in the ground, leading to the overturning of the
machine.
• Road surface with low-cost pavement (low-
cost asphalt or thin concrete)
• Surface with paving stones
• Area reclaimed after excavation work
• Landfill
• Road shoulders or area close to hole such as
excavation work
• Deteriorated pavement surface
• Areas where under the pavement surface is
hollow due to water erosion and the top soil
appears to be hard but soft in the ground
• Slope
• Place a sole plate of sufficient size with
sufficient strength under the tray of all the
outriggers on the soft ground to protect the
ground.
• If you have to set the outriggers near the road
shoulder by necessity, take secure action to
prevent the collapse of the road shoulder.
• When working on the slope, level the tray of all
the outriggers and the ground under the rubber
tracks before setting the outriggers.
Setting the outriggers with the tilted ground
surface without levelling the ground surface will
cause the outriggers to slip or overturn, causing
serious accidents.
• If the ground is not protected or if the outriggers
may sink even after protecting the ground, do
not perform the crane operations.
Fig. 4-87
Fig. 4-88
Fig. 4-89
Fig. 4-90
Fig. 4-91
Use of stable sole plate
Surface with low-cost pavement
Surface with paving stones
Landfill, etc.
Leveling ground of slope