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Remove all of mud and oil from the steps or oth-
q
er places used to get on and off the machine
completely. Always use the handrails, ladders of
steps when getting on or off the machine. Never
jump on or off the machine. When the scaffold is
not provided, use steps or stepladder to secure
your footing.
Precautions during work
For the machine equipped with the battery dis-
q
connect switch, check that the system operating
lamp is turned off before starting the work. Then,
turn the battery disconnect switch to OFF (Q) po-
sition and remove the switch key. For the ma-
chine not equipped with the battery disconnect
switch, remove the cable from the battery before
starting the work. Be sure to remove the nega-
tive end (-) of the battery cable first.
Release the remaining pressure in the circuits
q
completely before the work when the parts in the
circuits of oil, fuel, coolant and air are discon-
nected or removed. When the cap of the oil filter,
drain plug or oil pressure pickup plug is re-
moved, loose them slowly to prevent the oil from
spurting out.
When removing or installing the checking plug or
q
the piping in the fuel circuit, wait 30 seconds or
longer after the engine is shut down and start the
work after the remaining pressure is released
from the fuel circuit.
Immediately after the engine is shut down, the
q
coolant and oil in the circuits are hot. Be careful
not to get scalded by the hot coolant and oil.
Start the work after checking that the coolant and
oil are cooled down sufficiently.
Start the work after the engine is shut down. Be
q
sure to shut down the engine when working on or
around the rotating parts in particular. When
checking the machine without shutting down the
engine (measuring oil pressure, rotational
speed, oil or coolant temperature), take extreme
care not to get caught in the rotating parts or the
working equipment.
The hoist or crane must be used to sling the
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components weighing 25 kg or heavier. Check
the slings (wire rope, nylon sling, chain and
hook) for damage before the work. Use the
slings with ample capacity and install them to the
proper places. Operate the hoist or crane slowly
to prevent the component from hitting any other
part. Do not work with any part still raised by the
hoist or crane.
When removing the part which is under internal
q
pressure or reaction force of the spring, always
leave 2 bolts in diagonal positions. Loosen those
2 bolts gradually and alternately and release the
pressure, then, remove the part.
WA200-7
When removing the part, be careful not to break
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or damage the electrical wiring. The damaged
wiring may cause electrical fires.
When removing piping, prevent the fuel or oil
q
from spilling out. If any fuel or oil drips onto the
floor, wipe it off immediately. Fuel or oil on the
floor can cause you to slip and can even cause
fires.
As a general rule, do not use gasoline to wash
q
parts. Do not use gasoline to clean the electrical
parts, in particular.
Reinstall the parts removed to their original plac-
q
es. Replace the damaged parts and the parts
which must not be used with new ones.
When installing the hoses and wiring harnesses,
be careful that they are not damaged by contact-
ing with other parts when the machine is operat-
ed.
When connecting the high pressure hoses and
q
tubes, make sure that they are not twisted. The
damaged high pressure hoses and tubes are
very dangerous when they are installed. So, be
extremely careful when connecting the high
pressure pipings. In addition, check that their
connections are correct.
When assembling or installing the parts, be sure
q
to tighten the bolts to the specified torque. When
installing the protective parts such as guards, or
the parts which vibrate violently or rotate at high
speeds, be sure to check that they are installed
correctly.
When aligning 2 holes, never insert your fingers
q
or hand into the holes. Align the holes with care
so that your fingers are not caught in the hole.
When measuring hydraulic pressure, check that
q
the measuring tools are correctly installed.
Pay attention to safety when removing and in-
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stalling the tracks of the track type machines.
When removing the track, it separates suddenly.
The workers should not stand at either end of the
track.
If the engine is operated for a long time in a
q
closed place which is not ventilated well, you
may suffer from gas poisoning. Accordingly,
open the windows and doors to ventilate the
place well.
00 Index and foreword
Important safety notice
00-15
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