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FOREWORD
Preparations for Work
1.
Before adding oil or making repairs, park the machine
on hard, level ground, apply the parking brake, and
block the wheels or tracks to prevent the machine from
moving.
2.
Before starting work, lower the work equipment (blade,
ripper, bucket) to the ground. If this is not possible,
insert the lock pin or use blocks to prevent the work
equipment from falling. In addition, be sure to lock all
the control levers and hang warning signs on them.
3.
When disassembling or assembling, support the
machine with blocks, jacks, or stands before starting
work.
4.
Remove all mud and oil from the steps or other places
used to get on and off the machine. Always use the
handrails, ladders, or steps when getting on or off the
machine. Never jump on or off the machine. If it is
impossible to use the handrails, ladders, or steps, use a
stand to provide safe footing.
Precautions During Work
1.
When removing the oil filler cap, drain plug, or
hydraulic pressure measuring plugs, loosen them slowly
to prevent the oil from spurting out. Before
disconnecting or removing components of the oil, water,
or air circuits, first remove the pressure completely from
the circuit.
2.
The coolant and oil in the circuits are hot when the
engine is stopped; be careful not to get burned. Wait for
the oil and coolant to cool before carrying out any work
on the oil or water circuits.
3.
Before starting work, remove the leads from the battery.
ALWAYS remove the lead from the negative (-)
terminal first.
4.
When raising heavy components (in excess of 25 kg
(55 lb)), use a hoist or crane. Check that the wire rope,
chains, and hooks are not damaged. Always use lifting
equipment which has ample capacity. Install the lifting
equipment at the correct 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.
5.
When removing a cover which is under internal pressure
or under pressure from a spring, always leave two bolts
in position on opposite sides. Loosen these bolts
gradually and alternately to release the pressure and
then remove the cover.
6.
When removing components, be careful not to break or
damage the electrical wiring. Damaged wiring may
cause electrical fires.
00-4
7.
When removing piping, stop the fuel or oil from spilling
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out. If any fuel or oil drips on the floor, wipe it up
immediately. Fuel or oil on the floor can cause you to
slip, or can even start fires.
8.
Gasoline or other fuels should never be used to clean
parts. Clean parts with appropriate solvents.
9.
Be sure to assemble all parts again in their original
places. Replace any damaged part with new parts.
10. When installing hoses and wires, be sure that they do
not get damaged by contact with other parts when the
machine is being operated.
11. Before starting work, stop the engine. When working on
or around a rotating part, stop the engine. When
checking the machine without stopping the engine
(measuring oil pressure, revolving speed, temperature,
etc.), be extremely careful not to get rolled or caught in
rotating or moving parts.
12. If the engine is operated for a long time in a place which
is not ventilated well, you may suffer from gas
poisoning. Before starting the engine, open the windows
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and doors so that the area is well ventilated.
13. When installing high-pressure hoses, make sure that
they are not twisted. Damaged tubes are dangerous; be
extremely careful when installing tubes for high-
pressure circuits. Also check that connecting parts are
correctly installed.
14. When assembling or installing parts, always use the
specified tightening torques. When installing protective
parts such as guards or parts which vibrate violently or
rotate at high speed, be particularly careful to check that
they are installed correctly.
15. When aligning two holes, never insert your fingers or
hand. Be careful not to get your fingers caught in a hole.
16. When measuring hydraulic pressure, check that the
measuring tool is correctly assembled before taking any
measurements.
17. Be careful when removing or installing the tracks of
track-type machines. When removing the track, the
track separates suddenly; never let anyone stand at
either end of the track.
18. When jump-starting the machine, only use a machine of
similar size and voltage. Never use an arc welder or
other electrical generating equipment to jump-start the
machine. Carefully review the safety and procedures for
jump-starting the machine.
SAFETY
WA500-6
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