Furukawa Unic URW370C4U Series, Руководство по эксплуатации и техническому обслуживанию

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SAFETY PRECAUTIONS ON CRANE OPERATION
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Pulling a cargo sideways, straight, or
obliquely is strictly prohibited.
These operation may cause slewing mem-
bers, booms, columns, and derrick cylinder to
be damaged.
7
When a cargo to be lifted is detached
from the ground, stop lifting it up tem-
porarily to confirm safety.
• When a cargo to be lifted is detached from
the ground, stop lifting it up temporarily
to make sure that the cargo is kept hori-
zontally, the crane maintains its stability,
and the rope slinging up the cargo is posi-
tioned properly.
Then lift it up again after making sure of
the safety.
• For lowering a cargo, stop lowering it
immediately before it touches the ground
then lower it again gradually.
8
Do not leave from operating position
with a cargo hoisted.
Lower a hoisted cargo onto the ground before
leaving from the operation site.
10
Do not stay under a hoisted cargo.
9
Do not get up on a cargo being hoisted.
This may cause a fall from the cargo being
hoisted.
11
Pay attention that wire ropes will
not be paid out unnecessarily to
prevent ropes from being wound around the
drum irregularly.
• Operation such as paying out wire ropes
further with a cargo placed on the ground,
retraction and/or lowering boom loosen
the ropes to cause them irregular winding
which results in remarkable shortening
service life of the ropes.
• Wind the first layer of rope firmly and
regularly around the drum.
• Correct kinks of rope immediately with a
mallet.
12
Pay extra attention to underground
crane work in which the hook must
be lowered further than the work on the
ground.
When paying out wire ropes, be sure that
more than 3 turns of rope must always be left
on the drum.
• Oil temperature is apt to rise easily if
repeated operation of winding up and
down the hook, especially in a high lift, is
required.
• Excessive high temperature of hydraulic
oil damages high-pressure hoses and gas-
kets being employed to cause the oil to
spout out so that a scald may result.
13
Stop crane operation when tem-
perature of hydraulic oil exceeds
176°F(80°C).