Stihl MS 391 Safety Manual page 13

2
1
N
use a low kickback chain and be
especially cautious
1. Begin the cut by applying the lower
portion of the guide bar nose – do
not use the upper portion – risk of
kickback! Cut until the depth of the
kerf is twice the width of the guide
bar
2. Swing the saw slowly into the
plunge-cutting position – risk of
kickback or pushback!
3. Make the plunge cut very carefully –
danger of pushback!
Heartwood cut
– if the diameter of the trunk exceeds
twice the length of the guide bar
– if a piece of heartwood remains
uncut on large diameter trunks
Chain Saw Safety Manual
– with trees that are difficult to fell
(oak, beech), to make possible to
maintain the planned direction of fall
3
more precisely and prevent the
heartwood from splintering
– with soft deciduous trees to relieve
tension in horizontal trunks and
prevent slivers of wood from being
torn out of the trunk
N Make the plunge cut in the felling
notch very carefully – danger of
pushback! – then swing in the
direction of the arrow
Limbing
Limbing may only be carried by persons
who have had special training. Persons
who are not experienced chain saw
users should carry out neither felling nor
limbing – risk of accidents!
– use a low-kickback saw chain
– Support the chain saw as much as
possible
– Do not stand on the trunk when
limbing
– Do not cut with the guide bar nose
– Watch out for limbs that are under
tension
– Never cut several limbs at once
Sawing thin wood
– Use a sturdy, stable fixture –
sawhorse
– Do not hold the wood in place with
your foot
– Other persons must neither be
allowed to hold the wood nor help in
any other way
Lying or standing logs under tension
Always make the cuts in the correct
order (first compression side (1), then
tension side (2), otherwise the chain
saw may pinch or kick back – risk of
injury!
1
2
2
1
N Make relieving cut in the
compression side (1)
N Make bucking cut in the tension
side (2)
English
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