Mini-Crawler Crane M A E D A Section 4 – WORKING WITH CRANE
1/2019 MC405C-3 4-59
Cooperation Hoisting Is Prohibited as
the Rule
Cooperation hoisting, that is to use more than
one crane to hoist a load, is prohibited.
The cooperation hoisting work is a highly
hazardous work that may cause for instance a
trip of the machine due to uneven centre of
gravity, fall of the hoisted load or boom damage.
If the need to work so exists for unavoidable
reason, establish a work scheme by
responsibility of the user, discuss fully, let the
worker fully acknowledge the work method and
procedures, then work carefully under the direct
leadership of the work supervisor.
And, observe the following cautions as well.
• Use the cranes of same model.
• Choose the machine model that can handle
sufficiently larger load than the load to be
hoisted.
• Make sure only one person gives signs.
• Limit the crane operations to single operations
as the rule, and do not attempt any slewing
operation.
• Appoint one responsible slinger who is most
experienced.
Working at the Site with Underground
Lifting
• Leave at least three loops of wire rope in the
winch drum when winding down the wire rope
in case of underground work or similar
occasion. This machine is equipped with three-
winding stop alarm / automatic stop device as
the safety device, but even then be fully careful
to prevent this safety device from activating.
• Make sure signs are communicated fully.
• Be especially careful with the crane operations.
Place Crane on Level and Hard Soil
Fig. 4-146
• Always place the outriggers on a level, stable
and solid ground.
Attempt to work with crane without outriggers
firmly contacting the ground may cause the
Machine to trip.
• Always place all outriggers before working with
crane.
• Do not set any outrigger near the location that
may collapse, for instance a soft ground,
roadside or drilled hole.
In case the outriggers need to be placed on a
soft ground for unavoidable reason, always
reinforce the ground by laying a sufficiently
large and strong base plate below each of all
outrigger supports.
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