Stihl BR 450 Manual De Instrucciones página 12

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otherwise disturbing asbestos,
immediately contact your employer or a
local OSHA representative.
WARNING
Dust with silica in its composition may
contain crystalline silica. Silica is a basic
component of sand, quartz, brick, clay,
granite and numerous other minerals
and rocks, including masonry and
concrete products. Repeated and / or
substantial inhalation of airborne
crystalline silica can cause serious or
fatal respiratory disease, including
silicosis. In addition, the state of
California and some other authorities
have listed respirable crystalline silica as
a substance known to cause cancer.
When encountering such materials,
always follow the respiratory
precautions mentioned above.
Operating Instructions
WARNING
In the event of an emergency, switch off
the engine immediately – move the
setting lever to 0 or STOP.
WARNING
Even though bystanders should be kept
away from the running power tool, never
work alone. Keep within calling distance
of others in case help is needed.
Stop the engine immediately if you are
approached.
10
WARNING
To reduce the risk of personal injury, do
not direct air blast towards bystanders,
since the high pressure of the air flow
can injure eyes and can blow small
objects at great speed.
WARNING
The blower fan between the air intake
and output openings rotates whenever
the engine is running.
Never insert any foreign object into the
air intake of the machine or into the
nozzle of the blower. It will damage the
fan wheel and may cause serious injury
to the operator or bystanders as a result
of the object or broken parts being
thrown out at high speed.
Do not place the blower on the ground
when operating at high speed, because
small objects such as sand, grass, dust,
etc. may be pulled into the air intake and
damage the fan wheel. It is best to turn
the machine off when putting it on the
ground.
WARNING
Never modify your muffler. Any
modification could cause an increase in
heat radiation, sparks or sound level,
thereby increasing the risk of fire, burn
injury or hearing loss. You may also
permanently damage the engine. Have
your muffler serviced and repaired by
your STIHL servicing dealer only.
WARNING
The muffler and other parts of the engine
(e.g. fins of the cylinder, spark plug)
become hot during operation and remain
hot for a while after stopping the engine.
To reduce risk of burns, do not touch the
muffler and other parts while they are
hot. Keep the area around the muffler
clean. Remove excess lubricant and all
debris such as pine needles, branches
or leaves. Let the engine cool down
sitting on concrete, metal, bare ground
or solid wood away from any
combustible substances.
WARNING
An improperly mounted or damaged
cylinder housing or a
damaged/deformed muffler shell may
interfere with the cooling process of the
muffler. To reduce the risk of fire or burn
injury, do not continue work with a
damaged or improperly mounted
cylinder housing or a
damaged/deformed muffler shell.
Your muffler is furnished with a spark
arresting screen designed to reduce the
risk of fire from the emission of hot
particles. Never operate your unit with a
missing or damaged spark arresting
screen. If your gas/oil mix ratio is correct
(i.e., not too rich), this screen will
normally stay clean as a result of the
heat from the muffler and need no
service or maintenance. If you
experience loss of performance and you
suspect a clogged screen, have your
muffler maintained by a STIHL servicing
dealer. Some state or federal laws or
regulations may require a properly
maintained spark arrestor for certain
BR 450, BR 450 C