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11)Do not use twisted or kinked wire ropes.
12)When lifting up a load, observe the following.
q
Wind in the crane slowly until wire ropes
are stretched. When settling the wire
ropes with the hand, do not grasp them
but press them from above. If you grasp
them, your fingers may be caught.
q
After the wire ropes are stretched, stop
the crane and check the condition of the
slung load, wire ropes, and pads.
q
If the load is unstable or the wire rope or
chains are twisted, lower the load and lift
it up again.
q
Do not lift up the load at an angle.
13)When lowering a load, observe the following.
q
When lifting down a load, stop it tempo-
rarily at 30 cm above the floor, and then
lower it slowly.
q
Check that the load is stable, and then re-
move the sling.
q
Remove kinks and dirt from the wire
ropes and chains used for the sling work,
and put them in the specified place.
5. Precautions for using mobile crane
a Read the Operation and Maintenance Manu-
al of the crane carefully in advance and oper-
ate the crane safely.
6. Precautions for using overhead traveling
crane
k
A hoist crane or similar device must be
used for lifting a heavy load (25 kg or
more). The weight of a part that is 25 kg or
more is indicated with the symbol "
"Disassembly and assembly".
1) Before starting work, inspect the wire ropes,
brake, clutch, controller, rails, over wind stop
device, ground fault circuit interrupter, crane
collision prevention device, and power appli-
cation warning lamp, and check safety.
2) Observe the signals for sling work.
3) Operate the hoist at a safe place.
PC600, 650, 700-8E0
(03)
4) Check the direction indicator plates (east,
west, south, and north) and the directions of
the control buttons without fail.
5) Do not sling a load at an angle. Do not move
the crane while the slung load is swinging.
6) Do not raise or lower a load while the crane
is moving longitudinally or laterally.
7) Do not drag a sling.
8) When lifting up a load, stop it just after it
leaves the ground and check safety, and
then lift it up.
9) Consider the travel route in advance and lift
up a load to a safe height.
10)Place the control switch in a position where it
will not be an obstacle to work and passage.
11)After operating the hoist, do not swing the
control switch.
12)Remember the position of the main switch so
that you can turn off the power immediately in
an emergency.
13)If the hoist stops because of a power failure,
turn the power switch OFF. When turning on
a switch which was turned OFF by the
ground fault circuit interrupter, check that the
devices related to that switch are not in oper-
ating condition.
14)If you find an obstacle around the hoist, stop
the operation.
15)After finishing the work, stop the hoist at the
specified position and raise the hook to at
least 2 m above the floor. Do not leave the
sling installed to the hook.
7. Selecting wire ropes
1) Select adequate ropes depending on the
weight of parts to be hoisted, referring to the
table below
(Standard "Z" twist ropes without galvanizing)
(JIS G3525, No. 6, Type 6X37-A)
Nominal diameter
of rope
mm
10
12
14
16
18
20
25
4
" in
30
40
50
60
a The allowable load is one-sixth of the
breaking strength of the rope to be used
(Safety coefficient: 6).
Foreword and general information
Safety notice
Wire ropes
Allowable load
kN
ton
8.8
0.9
12.7
1.3
17.3
1.7
22.6
2.3
28.6
2.9
35.3
3.6
55.3
5.6
79.6
8.1
141.6
14.4
221.6
22.6
318.3
32.4
00-15
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