Stihl MS 192 T Instruction Manual page 13

English
To reduce risk of falls, keep rotating
saw chain well clear of harness and
lifelines to avoid them being severed. It
is essential to use a double lifeline.
Check condition of harness, belts and
ropes at regular frequent intervals.
Always pull the saw out of the cut with
the chain running.
After finishing a cut, activate the chain
brake to lock the chain or shut down the
engine before moving the saw to
another position in the tree.
12
Reactive forces including kickback
!
Warning!
Reactive forces may occur any time the
chain is rotating. Reactive forces can be
dangerous! In any chainsaw, the
powerful force used to cut wood can be
reversed (and work against the
operator). If the rotating chain is
suddenly stopped by contact with any
solid object like a log or branch or is
pinched, the reactive forces may occur
instantly.
These reactive forces may result in loss
of control which may, in turn, cause
serious or fatal injury. An understanding
of the causes of these reactive forces
may help you avoid loss of control.
The most common reactive forces are
– kickback,
– pushback,
– pull-in.
Kickback
.Kickback may occur
when the moving saw
chain near the upper
quadrant of the bar nose
contacts a solid object or
is pinched.
The reaction of the cutting force of the
chain causes a rotational force on the
chainsaw in the direction opposite to the
chain movement. This may fling the bar
up and back in an uncontrolled arc
mainly in the plane of the bar. Under
some cutting circumstances the bar
moves towards the operator, who may
suffer severe or fatal injury.
Kickback may occur, for example, when
the chain near the upper quadrant of the
bar nose contacts the wood or is pinched
during limbing or when it is incorrectly
used to begin a plunge or boring cut.
MS 192 T