Komatsu PC88MR-10 Shop Manual page 18

00 Index and foreword
Foreword, safety and general information
for electric shock prevention, crane collision
prevention device, and energizing warning lamp,
and check the following safety items.
Observe the signals for sling work.
Operate the hoist at a safe place.
Be sure to check the directions of the direction
indication plate (north, south, east and west) and
the operating button.
Do not sling a load at an angle. Do not move the
crane while the slung load is swinging.
Do not raise or lower a load while the crane is
moving longitudinally or laterally.
Do not drag a sling.
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 a
load to a safe height.
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
control switch.
Remember the position of the main switch so
that you can turn off the power immediately in an
emergency.
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 prevention, check
that the devices related to that switch are not in
operating condition.
If you find an obstacle around the hoist, stop the
operation.
After finishing the work, stop the hoist at the
specified position and raise the hook to at least 2
meters above the floor. Do not leave the sling
attached to the hook.
Selecting wire ropes
Select adequate ropes depending on the weight
of the parts to be hoisted, referring to the table
below
Wire rope (JIS G3525, 6 x 37 - Type A)
(Standard Z twist wire ropes without galvanizing)
Nominal
diameter of rope
mm
10
12
14
16
18
20
25
30
40 141.6
50 221.6
60 318.3
00-16
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
14.4
22.6
32.4
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
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
conditioner gas: R134a). (Only registered
persons can work.)
a Never release the refrigerant (air conditioner
gas: R134a) to the atmosphere.
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 clothes with long
sleeves while collecting the refrigerant or
filling the air conditioner circuit with the
refrigerant.
When loosening the nuts fixing air conditioner
hoses and tubes, be sure to use 2 wrenches;
use one wrench to fix and use the other one to
loosen the nut.
Connection
When installing the hose for the air conditioner
circuit, take care not to allow invasion of dirt,
dusts and water into the hose.
Check that the O-rings are fitted to the joints
when connecting the air conditioner piping.
Once an O-ring is used, it is deformed and
deteriorated. Accordingly, do not reuse it.
When removing the O-rings, use a soft tool so
that the piping is not damaged.
Check that the O-ring is not damaged or
deteriorated.
Apply compressor oil for refrigerant (R134a) to
the O-ring.
a However, do not apply oil to the threaded
part of a bolt, nut or union.
Manufacturer
DENSO ND-OIL8
ZXL100PG (equivalent to
VALEO THERMAL
PAG46)
SYSTEMS
SANDEN SP-10
Part name
PC88MR-10