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English / USA
When a kickback occurs, the guide bar
may rotate around the front handle. If the
cutting position is such that the
operator's left hand is gripping the front
handle behind the hand guard, and if the
left hand rotates around the front handle
and makes a sufficiently forceful contact
with the front hand guard, which is the
Quickstop activating lever, this contact
will activate a properly maintained
Quickstop chain brake. The chain brake
on newer STIHL chainsaws can also be
activated by inertia. If the kickback
forces are sufficiently high, the hand
guard is accelerated towards the bar
nose even without hand contact.
18
On models equipped with a rear-handle-
activated chain brake the interlock lever
and the throttle trigger on the rear
handle act as a third means of
activation.
See the chapter entitled "Chain Brake"
of your instruction manual.
!
Warning!
Never operate your chainsaw without a
front hand guard. In a kickback situation
this guard helps protect your left hand
and other parts of your body. In addition,
removal of the hand guard on a saw
equipped with a Quickstop chain brake
will deactivate the chain brake.
!
Warning!
No Quickstop or other chain brake
device prevents kickback. These
devices are designed to reduce the risk
of kickback injury, if activated, in certain
kickback situations. In order for the
Quickstop to reduce the risk of kickback
injury, it must be properly maintained
and in good working order. See the
chapter of your instruction manual
entitled "Chain Brake" and the section
"Maintenance, Repair and Storing" at
the end of these Safety Precautions. In
addition, there must be enough distance
between the bar and the operator to
ensure that the Quickstop has sufficient
time to activate and stop the chain
before potential contact with the
operator.
!
Warning!
An improperly maintained chain brake
may increase the time needed to stop
the chain after activation, or may not
activate at all.
!
Warning!
Never run the chainsaw above idle
speed for more than 3 seconds when the
chain brake is engaged or when the
chain is pinched or otherwise caught in
the cut. Clutch slippage can cause
excessive heat, leading to severe
damage of the motor housing, clutch
and oiler component and may interfere
with the operation of the chain brake. If
clutch slippage in excess of 3 seconds
has occurred, allow the motor housing to
cool before proceeding and check the
operation of your chain brake as
described in the chapter entitled "Chain
Brake" of your instruction manual. Also
make sure that the chain is not turning at
idle speed (see above at "Important
Adjustments").
MS 280 C
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