M A E D A Mini-Crawler Crane Section 4 – CRANE OPERATION
9/2020 MC285CB-3 4-65
Boom Lifting Operation
Safety Precautions
WARNING! Tip Hazard. Always move the
boom lift lever slowly while hoisting a load.
Sudden movement of the lever may cause the
load to sway.
Boom Lifting / Lowering Procedure
To operate the boom lift lever (4):
Fig. 4-162
• Lower: Push the lever forward to LOWER.
• Neutral: Release the lever. The lever returns to
the NEUTRAL position and the boom stops.
• Raise: Pull the lever toward you to RAISE.
Adjust the boom lifting speed with the boom lift
lever and the travel of the accelerator levers.
Boom Telescoping Operation
Safety Precautions
WARNING! Tip Hazard. Always move the
boom telescoping lever slowly while hoisting
a load. Sudden movement of the lever may
cause the load to sway.
WARNING! Sudden Movement Hazard. Verify
the weight of the load before extending the
boom. As the boom extends, the working
radius increases and the rated total load
decreases. Do not pull a load sideways or
draw it in while telescoping the boom. These
conditions may cause unreasonable force on
the machine and uncontrollable movement of
the load.
WARNING! Unsafe Operation Hazard. Do not
allow the hook block to contact the boom
when telescoping the boom. When
telescoping the boom, the hook block will
start to move toward the boom. Do not allow
the hook block to contact the boom. Damage
to the boom, hook block and/or wire rope
cables may result. Always maintain clearance
between the hook block and boom when
telescoping the boom.
WARNING! Unsafe Operation Hazard. Do not
continue to hoist a load if the overwind alarm
detector sounds. Stop the operation
immediately and return all operation levers to
the NEUTRAL position.
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