Stihl MSA 160 C Instruction Manual page 63

Large diameter trunks: sectioning
method
1
Use the sectioning method if the
diameter of the trunk exceeds the length
of the chain saw guide bar.
1. First cut
The nose of the guide bar should
enter the wood just behind the hinge
– hold the machine absolutely
horizontally and swing it as far as
possible – use the spiked bumper as
a pivot point – reposition the
machine as little as possible.
MSA 160 C
2
4
2. While repositioning for the next cut,
keep the guide bar fully engaged in
the cut in order to avoid an uneven
felling cut – apply the spiked bumper
again, etc.
3. Insert wedge (3)
4. Last cut: Position the machine as for
the simple fan cut – do not saw
through the bridge!
Special cutting techniques
Plunge-cutting and heartwood cutting
require training and experience.
Plunge-cutting
for felling leaners
–
for relieving cuts during bucking
–
for DIY projects
–
2
1
use a low kickback chain and be
N
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
English
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