M A E D A Mini-Crawler Crane Section 4 –RADIO REMOTE CONTROL SYSTEM OPERATION
9/2020 MC285CB-3 4-113
Fig. 4-280
Boom Lifting/Lowering Operation
WARNING! Operate the lever as slowly as
possible.
WARNING! When the boom is lowered, the
working radius increases, and the rated total
load that can be hoisted decreases. When
operating the machine by lifting the boom,
exercise caution so that the mass (weight) of
the hoisted load is not overloaded when the
boom reaches the lowest position.
Move the operation lever (12) as follows:
• Lowering: Push the lever forward.
• Neutral: Release your hand from the lever.
The lever returns to the “Neutral” position and
the boom lifting stops.
• Raising: Pull the lever toward you.
Fig. 4-281
NOTICE: Adjust the raising and lowering speed of
the boom by moving the lever forward or
backward.
Boom Telescoping Operation
WARNING! Operate the lever as slowly as
possible.
WARNING! Do not pull the load horizontally or
pull in the load by telescoping the boom.
WARNING! When the boom is extended, the
working radius increases, and the rated total
load that can be hoisted decreases. When
working while extending/retracting the boom,
pay extra attention so that the mass (weight)
of the load at the time the boom is most
lowered does not cause overloading.
WARNING! When the boom is extended, the
hook block is hoisted.
If the over winding detector generates an
alarm buzzer while the boom is extended,
immediately shift the left operation lever into
the “Neutral” position to stop the boom
operation.
CAUTION:
• The hook block is hoisted or lowered while
the boom is extended/retracted. Perform the
winch operation at the same time to adjust
the hook block height.
• When the boom is extended for a long time,
the boom slightly retracts due to the
temperature change in the hydraulic oil. In
this case, extend the boom as needed.
Move the operation lever (10) as follows:
• Extending: Push the lever forward.
• Neutral: Release your hand from the lever.
• The lever returns to the “Neutral” position and
the boom telescoping stops.
• Retracting: Pull the lever toward you.
Fig. 4-282
NOTICE: Adjust the boom extension and
retraction speed by moving the lever forward or
backward.
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