OPERATION
M A E D A
Crawler Crane
16
6/2020 CC1908S-1 Quick operation guide
[BOOM DERRICKING]
WARNING
・
Operate the right-hand control lever as
slowly as possible.
Especially avoid sudden lever operations
when a load is hoisted, which may cause
the load to sway and hit the machine,
damaging the crane or causing the machine
to topple.
・
Drawing in a load or standing it upright by
derricking is prohibited. Be sure to use
hook hoisting to lift loads.
・
Lowering the boom increases the working
radius and reduces the rated total load that
can be hoisted. When derricking the boom,
pay extra attention so that the weight of the
load at the lowermost boom position does
not cause overloading.
Operate the right-hand control lever (1) as
follows:
・
Lowering: Push the lever outside (right side).
・
Neutral: Release your hand from the lever.
The lever returns to the neutral
position and boom derricking stops.
・
Raising: Pull the lever inside (left side).
Adjust the boom derricking speed by varying
the stroke of the right-hand control lever (1)
and the depression of the accelerator pedal
(2).
When the boom length display on the
moment limiter display is "6.0 m" or longer,
lowering stops automatically to prevent the
boom angle falling below a horizontal
position.
