Stihl SP 451 Instruction Manual page 7

To reduce the risk of accidents, stop
work immediately in the event of
nausea, headache, visual disturbances
(e.g. reduced field of vision), problems
with hearing, dizziness, deterioration in
ability to concentrate. Apart from other
possibilities, these symptoms may be
caused by an excessively high
concentration of exhaust gases in the
work area.
The dusts, vapor and smoke produced
during operation may be dangerous to
health. If dust levels are very high, wear
a suitable respirator.
To reduce the risk of fire, do not smoke
while operating or standing near your
power tool. Note that combustible fuel
vapor may escape from the fuel system.
Operate your power tool so that it
produces a minimum of noise and
emissions – do not run the engine
unnecessarily, accelerate the engine
only for cutting.
Do not work alone – keep within calling
distance of others in case help is
needed.
Work calmly and carefully – in daylight
conditions and only when visibility is
good. Stay alert so as not to endanger
others.
Do not operate your power tool in the
starting throttle position. Engine speed
cannot be controlled with the throttle
trigger in this position.
Opening the throttle while the hook is
blocked increases the load and reduces
engine speed. The clutch then slips
continuously and this causes
overheating and damage to important
components (e.g. clutch, polymer
SP 451, SP 481
housing components) – and this can
increase the risk of injury from the hook
moving while the engine is idling.
To reduce the risk of personal injury
from falling branches, fruit, etc., do not
allow any other persons within a radius
of 15 meters of your own position while
you are working.
Special care must be taken when
working in difficult, over-grown terrain.
Take special care in slippery conditions
– damp, slopes, fruit on the ground and
on uneven ground.
Watch out for obstacles: Watch out for
tree stumps, roots and fallen fruit to
avoid stumbling.
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
Before starting work, check the safety
devices for damage or wear. Always
replace damaged parts. Never operate
your power tool with damaged safety
devices.
Check the hook, rubber element and
shaft at regular short intervals or
immediately if there is a noticeable
change in the tool's behavior:
– Shut off the engine and hold the unit
firmly.
– Check condition – look for cracks.
– Replace damaged parts
immediately, even if they have only
superficial cracks.
To reduce the risk of unintentional
engine start and injury, always shut off
the engine before replacing the hook
and shaft.
Do not continue using or attempt to
repair a damaged or cracked hook by
welding or straightening.
After finishing work or before leaving the
unit unattended: Shut off the engine.
Vibrations
The function of this har-
vester causes vibrations.
Some of these vibrations
are transmitted to the
handles. Therefore, the
permissible period of
daily usage for one oper-
ator is restricted.
Recommendation: Several persons
should share the day's work with the
harvester by rotating at regular intervals.
No general recommendation can be
given for the length of usage because it
depends on several factors.
The period of usage is prolonged by:
– Hand protection (wearing warm
gloves)
– Work breaks
The period of usage is shortened by:
– Any personal tendency to suffer
from poor circulation (symptoms:
frequently cold fingers, tingling
sensations).
– Low outside temperatures.
– The force with which the handles
are held (a tight grip restricts
circulation).
Seek medical advice immediately if any
of the following symptoms appear:
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