Maeda CC1908S-1, Руководство по эксплуатации

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M A E D A Crawler Crane 5.4 CRANE OPERATION
5/2020 CC1908S-1 5-23
PRECAUTIONS WHEN SLINGING
• Check the following points before hoisting a
load:
• Attempt to hoist the load without checking may
result in serious personal injury by dropping
the load or toppling.
Adhere to the values given in the rated total
load chart.
Hoist from the centre of gravity of the load.
Check that the wire rope of the hook block is
vertical.
When the load leaves the ground, stop
winding up the load briefly and check that
the load is stable.
• Before hoisting a slung load, always check
whether the sling wire rope "retainer device"
on the hook block is hung correctly. If the
"retainer device" is not attached, the wire rope
may detach from the hook block and cause the
load to fall, resulting in a serious accident.
• A larger wire rope angle when hoisting the load
increases the force acting on the wire rope
even when the load weight remains
unchanged, possibly causing the wire rope to
break. Make sure excessive force is not
applied to the wire rope when slinging.
• Hoist only one load at a time.
Attempting to hoist more than one load may
cause the hoist fixture to hit and damage other
hoisted loads, or the loads may shift and
become unbalanced, resulting in serious
accidents such as toppling.
Do not hoist more than one load even if the
total combined weight is within the rated total
load.
• Hoisting long loads may cause the load to be
unstable and is dangerous.
With long loads, either hoist vertically using a
hoisting bag or keep the hoisted load balanced
by attaching ropes to either end of the load.
PRECAUTIONS WHEN HANDLING WIRE
ROPE
• Wire ropes wear out over time. Be sure to
inspect wire ropes each time before work, and
replace immediately when the wear limit is
reached.
For details on replacement criteria, refer to
"6.18.1.1 WIRE ROPE REPLACEMENT
CRITERIA" on P. 6-75.
Inspect the sheave at the tip of the boom and
the sheave of the hook block at the same time.
Damaged sheaves accelerate damage to the
wire ropes.
• Use wire ropes specified by Maeda.
• Otherwise, there is a risk of injury if wires
break or fly out.
Always wear leather gloves when handling the
wire rope.
PRECAUTIONS WHEN OPERATING CRANE
• Crane stability is dependent on direction. In the
diagonal direction, although stability is
increased, exceeding the rated load may result
in damage to the boom or machine body. Do
not turn off the moment limiter (overload
prevention device), even when operating in the
diagonal direction.
• Be sure to check that the override switch is in
the "OFF" (auto) position before operating the
crane.
Do not attempt to operate the crane when the
override switch is in the "ON" (cancel) position.
The override switch should be used in the
"ON" (cancel) position only during inspection
or maintenance work.
• Pay attention to the display and warnings for
the monitor of moment limiter (overload
prevention device) while working.
• Attempting to work beyond the capacity of the
machine may cause serious accidents and
failures due to toppling or breakage. Crane
operations must always be carried out
according to the rated total load chart.
• Operate the crane slowly.
Sudden operations using the levers or
accelerator are dangerous and may cause the
load to sway, drop, or hit surrounding objects.
Slewing in particular must be performed
slowly.