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FOREWORD
13) When lifting down a load, observe the fol-
lowing.
•
When lifting down a load, stop it tempo-
rarily at 30 cm above the floor, and then
lower it slowly.
•
Check that the load is stable, and then
remove the sling.
•
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
★ Read the Operation and Maintenance Manu-
al of the crane carefully in advance and op-
erate the crane safely.
6. Precautions for using overhead hoist crane
k
When raising a heavy part (heavier than
25 kg), use a hoist, etc. In Disassembly
and assembly, the weight of a part heav-
ier than 25 kg is indicated after the mark
4
of
.
1) Before starting work, inspect the wire ropes,
brake, clutch, controller, rails, over wind stop
device, electric shock prevention earth leak-
age breaker, crane collision prevention
device, and power application warning
lamp, and check safety.
2) Observe the signs for sling work.
3) Operate the hoist at a safe place.
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 slantingly. 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 on a position where
it will not be an obstacle to work and pas-
sage.
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 immedi-
ately 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 elec-
tric shock prevention earth leakage breaker,
check that the devices related to that switch
are not in operation state.
14) If you find an obstacle around the hoist, stop
the operation.
00-6
(14)
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.
Wire ropes
(Standard "Z" twist ropes without galvanizing)
(JIS G3525, No. 6, Type 6X37-A)
Nominal
diameter of rope
mm
10
8.8
12
12.7
14
17.3
16
22.6
18
28.6
20
35.3
25
55.3
30
79.6
40
141.6
50
221.6
60
318.3
★ The allowable load is one-sixth of the
breaking strength of the rope used
(Safety coefficient: 6).
SAFETY NOTICE
Allowable load
kN
ton
0.9
1.3
1.7
2.3
2.9
3.6
5.6
8.1
14.4
22.6
32.4
PC200/220(LC)-7
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