Stihl MSA 160.0 C Instruction Manual page 52

English
► If the wood is sound and long-fibered:
Observe the following points when making
sapwood cuts:
– The cuts must be the same at both sides.
– The cuts must be at same height as bottom
of felling notch.
– The width of the cuts is 1/10 of the trunk
diameter.
The trunk does not splinter when the tree falls.
13.4.5 Plunge cutting
Plunge cutting is a technique required for felling.
1.
3.
2.
► Begin cut with the lower portion of the guide
bar nose – with chain running at full speed.
► Cut until depth of kerf is twice the width of the
guide bar.
► Swing the saw into plunge-cutting position.
► Perform the plunge cut
13.4.6 Selecting the Appropriate Felling Cut
The choice of appropriate felling cut depends on
the following conditions:
– The natural inclination of the tree
– The tree's branch formation
– Damage to the tree
– The tree's state of health
– If there is snow on the tree: the snow load
– The direction of slope
– Wind direction and speed
– Nearby trees, if any
There are different features of these conditions.
Only two features are described in this Instruc‐
tion Manual.
52
1
1 Normal tree
A normal tree is vertical and has an even
crown.
2 Leaner
A leaner stands at an angle and the crown
faces in the direction of fall.
13.4.7 Felling normal, small diameter tree
A normal tree is felled with a felling cut and stabi‐
lizing strap. This felling cut must be performed if
the tree diameter is less than the guide bar's
length.
► Shout a warning.
► Plunge the guide bar into the felling cut until it
is visible at the other side of the trunk,
13.4.5.
► Apply the spiked bumper behind the hinge and
use it as a pivot.
► Enlarge felling cut in direction of hinge.
► Enlarge felling cut in direction of stabilizing
strap.
► Insert a felling wedge. The felling wedge must
match the tree diameter and the width of the
felling cut.
► Shout a warning.
13 Operating the Saw
2
1.
2.
3.
0458-024-9801-A