Komatsu PC200-8M0 Shop Manual page 21

200 Foreword and general information
Foreword, safety and general information
1. When lifting down a load, stop it temporar-
ily at 30 cm above the floor, and then
lower it slowly.
2. Check that the load is stable, and then
remove the sling.
3. Remove kinks and dirt from the wire ropes
and chains used for the sling work, and
put them in the specified place.
Precautions for using mobile crane
a Read the Operation and Maintenance Manual
of the crane carefully in advance and operate
the crane safely.
Precautions for using overhead traveling crane
k
The hoist or crane must be used to sling
the components weighing 25 kg or heavier.
A part weighing 25 kg or heavier in "disas-
sembly and assembly" section is indicated
with the symbol of
q Before starting work, check the wire ropes,
brake, clutch, controller, rails, over winding
prevention device, ground fault circuit inter-
rupter for electric shock prevention, crane colli-
s ion pr eve ntio n de vi ce, and ener gi zi ng
warning lamp, and check the following safety
items.
q Observe the signals for sling work.
q Operate the hoist at a safe place.
Be sure to check the directions of the direction
q
indication plate (north, south, east and west)
and the operating button.
q Do not sling a load at an angle. Do not move
the crane while the slung load is swinging.
q Do not raise or lower a load while the crane is
moving longitudinally or laterally.
Do not drag a sling.
q
q When lifting up a load, stop it just after it leaves
the ground and check safety, and then lift it up.
Consider the travel route in advance and lift up
q
a load to a safe height.
q Place the control switch in a position where it
will not be an obstacle to work and passage.
After operating the hoist, do not swing the con-
q
trol switch.
q Remember the position of the main switch so
that you can turn off the power immediately in
an emergency.
q Shut down the main switch when the hoist
stops because of a blackout. When turning on
a switch which is turned OFF by the ground
fault circuit interrupter for electric shock pre-
vention, check that the devices related to that
switch are not in operating condition.
q If you find an obstacle around the hoist, stop
the operation.
PC200, 200LC, 220, 220LC-8M0
4
.
After finishing the work, stop the hoist at the
q
specified position and raise the hook to at least
two meters above the floor. Do not leave the
sling attached to the hook.
Selecting wire ropes
q Select adequate ropes depending on the
weight of the parts to be hoisted, referring to
the table below
Wire ropes (standard "Z" twist ropes without galva-
nizing) (JIS G3525, Type 6x37-A)
Nominal
diameter of rope
mm
10
12
14
16
18
20
25
30
40
50
60
a The allowable load is calculated as one sixth of
the breaking load of the rope to be used
(safety coefficient: 6).
Precautions for disconnecting and connecting
hoses and tubes in air conditioner circuit
Disconnection
k
When replacing the air conditioner unit, air
conditioner compressor, condenser or
receiver drier, etc., collect the refrigerant
(air conditioner gas: R134a) from the air
conditioner circuit before disconnecting
the air conditioner hoses.
a Ask a qualified person for collecting, adding
and filling operations of the refrigerant (air con-
ditioner gas: R134a).
a Never release the refrigerant (air conditioner
gas: R134a) to the atmosphere.
k
If refrigerant gas (air conditioner gas:
R134a) gets in your eyes, you may lose
your sight. And if it touches your skin, you
may suffer from frostbite. Put on protective
eyeglasses, gloves and working cloth with
long sleeves while collecting the refrigerant
or filling the air conditioner circuit with the
refrigerant.
SEN06112-00
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
00-200
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