Kickback And Other Reactive Forces; Reactive Forces - Stihl MS 261 Manual De Instrucciones

6 Kickback and Other Reactive Forces

￭ The muffler of this chain saw is furnished with a 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. To reduce the risk of fire from the emission
of hot particles:
– Never operate your chain saw with a missing or
damaged spark arresting screen.
– If you experience loss of performance and suspect a
clogged screen, have your muffler serviced. Some
state or federal laws or regulations may require a
properly maintained spark arrester for certain uses.
￭ In California, it is a violation of § 4442 or § 4443 of the
Public Resources Code to use or operate gasoline-
powered tools on forest-covered, brush-covered or grass-
covered land unless the engine's exhaust system is
equipped with a complying spark arrester that is
maintained in effective working order. The owner/operator
of this product is responsible for properly maintaining the
spark arrester. Other states or governmental
entities/agencies, such as the U.S. Forest Service, may
have similar requirements.
– Do not use your chain saw around flammable
materials or around vegetation or brush when there
is a risk of fire or wildfire.
– Contact your local fire authorities or the U.S. Forest
Service if you have any question about laws or
regulations relating to fire protection requirements.
DANGER
￭ To reduce the risk of electrocution:
– Never operate this chain saw in the
vicinity of any wires or cables that may
be carrying electric current.
– Never cut near power lines.
– Do not rely on the chain saw's insulation
against electric shock.
0458-573-8621-D
6 Kickback and Other Reactive Forces
6.1

Reactive Forces

WARNING
￭ Reactive forces may occur any time the chain is rotating.
Reactive forces can cause serious or fatal personal injury.
￭ The powerful forces used to cut wood can be reversed and
work against the operator. If the rotating saw chain is
suddenly and significantly slowed or stopped by contact
with any solid object such as a log or branch or is pinched,
the reactive forces may occur instantly.
￭ These reactive forces may result in loss of control, which,
in turn, may cause serious or fatal injury.
– An understanding of the causes of these reactive
forces may help you avoid the element of surprise
and loss of control. Surprise contributes to
accidents.
The most common reactive forces are:
– Kickback
– Pull-in
– Pushback
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