Stihl MSA 120 C Instruction Manual page 53

12 Operating the Saw
► Engage the bumper spike and use it as a ful‐
crum.
► Guide the full width of the bar into the wood
and reposition the bumper spike as required.
► Take the weight of the saw at the end of the
cut.
12.3 Limbing
► Support the saw on the log.
► With the chain running a full speed, pivot the
bar upwards against the limb.
► Cut through the limb with the top of the bar.
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2
► If the limb is under tension: Make the relieving
cut (1) at the compression side and then per‐
form bucking cut (2) from the tension side.
12.4 Felling
12.4.1 Determining direction of fall and
escape path
► Determine direction of fall so that the area in
which the tree falls is clear.
0458-716-9821-E
► Observe the following points when planning
escape path (B):
– Escape path (B) at an angle of 45° to direc‐
– No obstacles on the escape path (B).
– The top of the tree can be observed.
– If the escape path (B) is on a slope, it must
12.4.2
► Remove obstacles from work area at tree
base.
► Remove growth from tree base.
► If the tree has large, healthy buttress roots:
Make vertical cut first and then a horizontal
cut, and remove the resulting piece.
2
12.4.3
The felling notch determines the direction in
1
which the tree falls. Country-specific standards
for making the felling notch must be observed.
► Position the saw so that the felling notch is an
right angles to the direction of fall and the saw
is close to the ground.
► Make the horizontal cut.
► Make the angle cut at 45° to the horizontal cut.
tion of fall (A).
be parallel to the slope.
Preparing work area at base of tree
Cutting the felling notch
English
90°
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