8
5. Do not operate a chain saw in a tree. Operation of a
chain saw while up in a tree may result in personal
injury.
6. Always keep proper footing and operate the chain saw
only when standing on
fi
xed, secure and level surface.
Slippery or unstable surfaces such as ladders may
cause a loss of balance or control of the chain saw.
7. When cutting a limb that is under tension be alert for
spring back. When the tension in the wood
fi
bres is
released the spring loaded limb may strike the operator
and/or throw the chain saw out of control.
8. Use extreme caution when cutting brush and saplings.
The slender material may catch the saw chain and be
whipped toward you or pull you o
ff
balance.
9. Carry the chain saw by the front handle with the chain saw
switched o
ff
and away from your body. When transporting
or storing the chain saw always
fi
t the guide bar cover.
Proper handling of the chain saw will reduce the likelihood
of accidental contact with the moving saw chain.
10. Follow instructions for lubricating, chain tensioning
and changing accessories. Improperly tensioned or
lubricated chain may either break or increase the
chance for kickback.
11. Keep handles dry, clean, and free from oil and grease.
Greasy, oily handles are slippery causing loss of control.
12. Cut wood only. Do not use chain saw for purposes not
intended. For example: do not use chain saw for cutting
plastic, masonry or non-wood building materials. Use of
the chain saw for operations di
ff
erent than intended
could result in a hazardous situation.
Causes and operator prevention of kickback: (Fig. 2)
Kickback may occur when the nose or tip of the guide
bar touches an object, or when the wood closes in and
pinches the saw chain in the cut.
Tip contact in some cases may cause a sudden reverse
reaction, kicking the guide bar up and back towards the
operator.
Pinching the saw chain along the top of the guide bar
may push the guide bar rapidly back towards the
operator.
Either of these reactions may cause you to lose control
of the saw which could result in serious personal
injury. Do not rely exclusively upon the safety devices
built into your saw. As a chain saw user, you should
take several steps to keep your cutting jobs free from
accident or injury.
Kickback is the result of tool misuse and/or incorrect
operating procedures or conditions and can be avoided
by taking proper precautions as given below:
○
Maintain a
fi
rm grip, with thumbs and
fi
ngers encircling
the chain saw handles, with both hands on the saw
and position your body and arm to allow you to resist
kickback forces. Kickback forces can be controlled by
the operator, if proper precautions are taken. Do not let
go of the chain saw.
○
Do not overreach and do not cut above shoulder
height. This helps prevent unintended tip contact and
enables better control of the chain saw in unexpected
situations.
○
Only use replacement bars and chains speci
fi
ed by the
manufacturer. Incorrect replacement bars and chains
may cause chain breakage and/or kickback.
○
Follow the manufacturer’s sharpening and maintenance
instructions for the saw chain. Decreasing the depth
gauge height can lead to increased kickback.
ADDITIONAL SAFETY WARNINGS
1. Work without pressure. In addition, always keep your
body warm.
2. Before commencing work, re
fl
ect fully on the work
procedures involved and work to avoid accidents,
otherwise injury may occur.
3. Do not use in the event of bad weather, such as strong wind,
rain, snow, fog, or in areas prone to rockfall or avalanches.
In bad weather, judgment may be impaired and the
vibration may result in disaster.
4. When visibility is poor, such as during bad weather or
night, do not use the unit. In addition, do not use it in
rain or in a location exposed to rain.
Unstable foothold or loss of balance may result in an
accident.
5. Check the guide bar and saw chain before starting the
unit.
○
If the guide bar or saw chain is cracked, or the product
is scratched or bent, do not use the unit.
○
Check if the guide bar and saw chain are securely
installed. If the guide bar or saw chain is broken or
dislodged, this may result in an accident.
6. Before starting work, check to ensure the switch does
not engage unless the lock-o
ff
button is pressed.
If the unit does not working properly, immediately stop
using and request repair from your Hitachi Authorized
Service Center.
7. Install the saw chain properly, in accordance with the
instruction manual.
If installed incorrectly, the saw chain will come o
ff
the
guide bar and injury may occur.
8. Never remove any of the safety devices equipped
on the chain saw (brake lever, lock-o
ff
button, chain
catcher etc.).
In addition, do not alter or immobilize them.
Injury may occur.
9. In the following cases, switch the unit o
ff
and ensure
the saw chain is no longer moving:
○
When not in use or being repaired.
○
When shifting to a new work location.
○
When inspecting, adjusting or replacing the saw chain,
guide bar, chain case and any other part.
○
When re
fi
lling the chain oil.
○
When removing dust etc. from the body.
○
When removing obstacles, trash or sawdust generated
from work from the work area.
○
When you take o
ff
the unit, or when you get away from
the unit.
○
Otherwise, if you sense danger or anticipate risk.
If the saw chain is still moving, an accident may occur.
10. Work should generally be performed individually.
When multiple individuals are involved, ensure
su
ffi
cient spacing between them.
In particular, when felling standing trees or working on
a slope, if you anticipate trees falling, rolling or sliding,
ensure there is no danger to other workers.
11. Remain more than 15 m away from other people.
In addition, when working with multiple persons,
remain 15 m or more apart.
○
There is a risk of impact with scatters and other
accidents.
○
Prepare a whistle alert etc. and determine appropriate
contact method for other workers beforehand.
12. Before felling standing trees, ensure the following:
○
Determine a safe evacuation location prior to felling.
○
Remove obstacles (e.g., branches, shrubs) in advance.
○
Based on a comprehensive evaluation of the state
of the tree to be felled (e.g., trunk bend, tension of
branches) and the surrounding situation (e.g., state of
adjacent trees, presence of obstacles, terrain, wind),
decide on the direction in which the standing tree will
fall and then plan the felling procedure.
Careless felling may result in injury.
13. When felling standing trees, ensure the following:
○
During work, be very careful of the direction in which
trees fall.
○
When working on a slope, ensuring the tree will not roll,
always work from the uphill side of the terrain.
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