English / USA
Vibrations
Prolonged use of a power tool (or other
machines) exposing the operator to
vibrations may produce whitefinger
disease (Raynaud's phenomenon) or
carpal tunnel syndrome.
These conditions reduce the hand's
ability to feel and regulate temperature,
produce numbness and burning
sensations and may cause nerve and
circulation damage and tissue necrosis.
All factors which contribute to white-
finger disease are not known, but cold
weather, smoking and diseases or
physical conditions that affect blood
vessels and blood transport, as well as
high vibration levels and long periods of
exposure to vibration are mentioned as
factors in the development of whitefinger
disease. In order to reduce the risk of
whitefinger disease and carpal tunnel
syndrome, please note the following:
–
Most STIHL power tools are
available with an anti-vibration
("AV") system designed to reduce
the transmission of vibrations
created by the engine to the
operator's hands. An AV system is
recommended for those persons
using power tools on a regular or
sustained basis.
–
Wear gloves and keep your hands
warm.
4
–
Keep the AV system well
maintained. A power tool with loose
components or with damaged or
worn AV buffers will tend to have
higher vibration levels.
–
Maintain a firm grip at all times, but
do not squeeze the handles with
constant, excessive pressure. Take
frequent breaks.
All the above-mentioned precautions do
not guarantee that you will not sustain
whitefinger disease or carpal tunnel
syndrome. Therefore, continual and
regular users should closely monitor the
condition of their hands and fingers. If
any of the above symptoms appear,
seek medical advice immediately.
!
Warning
This power tool is
equipped with an anti-
vibration system.
However, owing to the
nature of the machine,
this system cannot be as
effective in reducing the transmission of
vibrations to the handles as normally
achieved in other STIHL portable power
tools.
Shaft movement and high engine
speeds generate severe vibrations in
this type of machine, particularly when it
is run at full throttle during the shaking
process. For this reason the unit should
be operated only for short periods at a
time and run at full throttle only during
the shaking process. The shaking
process itself should be kept as short as
possible. Always utilize the proper grip.
See the sections entitled "Holding and
controlling the power tool" and
"Operating instructions."
The permissible period of use is
influenced by the following factors:
–
Personal disposition to poor
circulation – symptoms: frequent
cold fingers, tingling sensations.
–
Special personal stress factors –
e.g. smoking, motorcycling in cold
weather, use of other vibrating
power tools, etc.
–
Using the unit at low outside
temperatures – STIHL recommends
you wear gloves to keep your hands
warm.
–
The force with which the handles
are held. Squeezing the handles of
the special harvester with constant,
excessive pressure restricts blood
circulation and is unfavorable.
–
Frequency of breaks – taking
regular work breaks is better than
long periods of uninterrupted
operation.
SP 200