Reactive Forces - Stihl MSA 161 T Instruction Manual

English
WARNING
￭
B
2
￭ The guide bar can be pinched when cutting wood that is
under tension. The user can lose control of the saw and
be seriously injured.
► Make a relieving cut (1) in the compression side (A) first,
then perform bucking cut (2), offset in direction of trunk,
at the tension side (B).
DANGER
￭ Working near live electric cables can result in accidental
contact with the chain and damage the cables. This can
result in serious or fatal injuries.
► Do not work near live electric cables.
48
1
A
4.7.2 Felling
WARNING
￭ Inexperienced users cannot assess the dangers of felling
a tree. This can result in serious or fatal injuries and
damage to property.
► If you have any queries: Do not fell the tree yourself.
￭ Parts of the tree being removed and branches can fall on
bystanders or objects during the felling operation. This
can result in serious or fatal injuries and damage to
property.
► Determine direction of fall so that the area in which the
part of the tree being removed falls is clear.
► Do not allow bystanders, children or animals within 2.5
tree lengths of the work area.
4.8

Reactive Forces

4.8.1 Kickback
Kickback can be caused for the following reasons:
– The rotating saw chain in the upper quadrant of the bar
nose makes contact with a hard object and is suddenly
braked.
– The rotating saw chain is pinched at the bar nose.
The chain brake cannot prevent kickback.
4 Safety Precautions
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