6
Do not operate the chain saw
with one hand. Physical injuries
of the majority of operators or
assistants are caused by
operation with one hand. In
order to normally control, the
chain saw must be operated
with both hands, and the throttle
should be controlled with one hand. If the chain saw is out of
control and slippage or side slipping is caused, personal injury
may cause.
Hold the handles of the chain saw with both hands during
operation of the engine, the right hand for holding the rear
handle, and the left hand for holding the front handle. The
handles of the chain saw must be held with the thumb and
other ngers in a loop form. Thus, bounce in operation can be
reduced, and the chain saw can be continuously controlled. In
any case, the chain saw must be controlled with both hands.
Do not cut branches higher than the chest.
Check whether there is any obstacle in the cutting area. Prevent
the front part of the guide plate from contacting with logs,
branches or other objects to prevent bounce during operation of
the chain saw.
High-speed cutting can help to reduce the possibility of
bounce. Low speed or throttle can help to control the chain
saw, thus reducing the possibility of bounce. Adopt the chain
saw grinding and maintenance methods provided by the
manufacturer. For replacement, use the guide plate and chain
saw provided by the manufacturer or the approved guide plate
and chain saw of equivalent performance.
Other Safety Protections and Precautions
Shock and Cold Protection Measures
According to Raynaud’s phenomenon, the
functions of ngers will be signicantly affected
after long-term exposure to cold air or vibration.
Therefore, the anti-vibration design of the chain
saw can help to reduce the intensity of vibration
transmitted from the handle to the body. Long-time exposure to
the cold and vibration will result in nger sounding or burning
and further paleness and numbness.
It is strongly recommended to take the following preventive
measures, as you cannot feel slight cold or vibration.
1. Keep the body warm, especially the head, neck, feet,
ankles, hands and wrists.
2. Smoking is prohibited at break during work. Stretching the
arms as much as practical to keep good blood circulation
of the body.
3. Limit the daily operating time of the chain saw, and minimize
the work requiring direct control of power tools by hand.
4. If you feel uncomfortable or the ngers are subject to
swelling and further paleness and numbness, you must
not work under cold and vibrating conditions and should
immediately seek medical help.
Repetitive injury
Excessive operation may result in swelling, numbness and
extreme pains of the muscles and tendons of the ngers, hands,
arms and shoulders. Repetition of the same actions by hand may
easily lead to the above symptoms.
Take the following steps to avoid the above symptoms:
1. Prevent the wrists from bending. Stretch the wrists out
and keep the wrists upright as possible as practical. Hold
objects with the entire hand, instead of the thumb and
forenger.
2. Rest several times during work to reduce the time of
repeated operation to make the arms rest.
3. Reduce the speed and intensity of repeated operation.
4. Exercise more to strengthen the arms and muscles.
5. Seek medical help if your ngers, hands, wrists or arms
feel numb or painful or utter sound.
