Maeda MC305C-3 - Working with Crane

M A E D A Mini-Crawler Crane Section 4 – WORKING WITH CRANE
3/2019 MC305C-3 4-49
WORKING WITH CRANE
Inspection before Starting Work
WARNING! Check that the safety devices and
crane operate properly.
• Operate each of the operation levers and
switches under no load, and check that
operations take place without abnormality.
• Repair immediately if any abnormality
exists.
• Check that the safety devices such as the
moment limiter, outrigger safety device, and
over winding detector / automatic stop
device activate properly.
Cautions When Handling Moment
Limiter
WARNING!
• Use/store the moment limiter under the
following ranges of ambient temperature.
★Temperature of use: 10 to 50 °C Storage
temperature: -20 to 60 °C
• Avoid direct sunlight so that the temperature
of the moment limiter body does not exceed
the above range.
• Avoid locations with strong acid or alkaline
atmosphere as much as possible. Otherwise,
unexpected failures may occur.
• Do NOT apply impact to the moment limiter
body for instance by colliding with an object.
• Such attempt may damage the case and may
result in failures and improper operations.
• Do NOT push the panel sheet of the moment
limiter body by a force more than necessary
or push with sharp object such as a tip of a
screwdriver. Such act may damage the panel
sheet and may result in failures and
improper operations.
• Do NOT remove the case cover or panel
sheet from, or disassemble the moment
limiter body. Such act may damage case
and/or panel sheet and may result in failures
and improper operations.
Cautions When Setting Up Moment
Limiter
WARNING!
• The moment limiter calculates the moments
assuming the Machine is level.
• If you work with the crane when the Machine
is not level, warnings and alarms are not
issued even when the rated total load is
near.
• ALWAYS set the outrigger horizontally to
the ground while looking at the level gauge.
• Before using the moment limiter, check that
the boom angle display, boom length
display and real load display are displayed
correctly following the crane movements.
Attempt to use without correct display
results in failure to obtain correct
measurement result and may result in
serious bodily accidents caused by reasons
such as an improper operation and/or
breakage of nearby equipment.
• ALWAYS make sure the wire strand setting
of the moment limiter matches with the wire
strand of the crane. If the wire strands do not
match, ALWAYS let the wire strands match
by changing the wire strand setting of the
moment limiter or by changing the wire
strand of the crane. Attempt to use with
unmatched wire strands results in failure to
obtain correct measurement result and may
result in serious bodily accidents caused by
reasons such as an improper operation
and/or breakage of nearby equipment.
• Do NOT carelessly change the setting when
measuring with the moment limiter. Such
attempt results in failure to obtain correct
measurement result and may result in
serious bodily accidents caused by reasons
such as an improper operation and/or
breakage of nearby equipment.