Foreword and general information
Safety notice
PC800, 850-8E0
12)When assembling or installing parts, always
tighten them to the specified torques. When
installing protective parts such as guards, or
parts which vibrate violently or rotate at high
speeds, be particularly careful to check that
they are installed correctly.
13)When aligning two holes, never insert your
fingers or hand. Be careful not to get your
fingers caught in a hole.
14)When measuring hydraulic pressure, check
that the measuring tools are correctly
installed.
15)Take care when removing or installing the
tracks of track-type machines. When
removing the track, the track separates
suddenly, so never let anyone stand at either
end of the track.
16)If the engine is operated for a long time in a
place which is not ventilated well, you may
suffer from gas poisoning. Accordingly, open
the windows and doors to ventilate well.
4.
Precautions for slinging work and making
signals
1) Only one appointed worker must make
signals and co-workers must communicate
with each other frequently. The appointed
signaler must make specified signals clearly
at a place where he is well seen from the
operator's seat and where he can see the
working condition easily. The signaler must
always stand in front of the load and guide
the operator safely.
q
Do not stand under the load.
q
Do not step on the load.
2) Check the slings before starting sling work.
3) Keep putting on gloves during sling work.
(Put on leather gloves, if available.)
4) Measure the weight of the load by the eye
and check its center of gravity.
5) Use proper sling according to the weight of
the load and method of slinging. If too thick
wire ropes are used to sling a light load, the
load may slip and fall.
6) Do not sling a load with one wire rope alone.
If it is slung so, It may rotate and may slip out
of the rope. Install two or more wire ropes
symmetrically.
k
Slinging with one rope may cause
turning of the load during hoisting, un-
twisting of the rope, or slipping of the
rope from its original winding position
on the load, which can result in a dan-
gerous accident.
7) Limit the hanging angle to 60 degree, as a
rule.
Do not sling a heavy load (25 kg or more)
with ropes forming a wide hanging angle
from the hook.
When hoisting a load with two or more ropes,
the force subjected to each rope will increase
with the hanging angle. The table below
shows the variation of allowable load in kN
{kg} when hoisting is made with two ropes,
each of which is allowed to sling up to 9.8 kN
{1,000 kg} vertically, at various hanging
angles. When the two ropes sling a load verti-
cally, up to 19.6 kN {2,000 kg} of total weight
can be suspended. This weight is reduced to
9.8 kN {1,000 kg} when the two ropes make
a hanging angle of 120 degree. If the two
ropes sling a 19.6 kN {2,000 kg} load at a
lifting angle of 150 degree, each of them is
subjected to a force as large as 39.2 kN
{4,000 kg}.
8) When installing wire ropes to an angular
load, apply pads to protect the wire ropes. If
the load is slippery, apply proper material to
prevent the wire rope from slipping.
9) Use the specified eyebolts and fix wire ropes,
chains, etc. to them with shackles, etc.
10)Apply wire ropes to the middle portion of the
hook.
q
Slinging near the tip of the hook may
cause the rope to slip off the hook during
hoisting. The hook has the maximum
strength at the middle portion.
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