Pushback; Proper Techniques For Basic Bucking, Limbing; Pruning And Felling; Intended Uses - Stihl MSA 120 C Manual De Instrucciones

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7.4

Pushback

WARNING
￭ Pushback occurs when the saw chain on the top of the bar
is suddenly stopped or significantly slowed when it is
pinched, caught or encounters a foreign object in the
wood. The reaction of the saw chain may drive the chain
saw rapidly straight back toward the operator, causing
loss of control which, in turn, may cause serious or fatal
injury.
￭ Pushback usually occurs when the top of the bar is used
for cutting.
￭ To reduce the risk of pushback:
– Be alert to forces or situations that may cause
material to pinch or bind the top of the saw chain.
– Do not cut more than one log at a time.
– Do not twist the chain saw when withdrawing the bar
from an underbuck cut because the saw chain can
pinch or bind.
– Cut with a sharp, properly tensioned chain.
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8 Proper Techniques for Basic Bucking, Limbing, Pruning and Felling
8 Proper Techniques for Basic Bucking,
Limbing, Pruning and Felling
8.1

Intended Uses

WARNING
￭ This chain saw is not designed for felling large trees or
cutting large diameter logs.
￭ For cutting larger trees, logs or branches, a larger, more
powerful and faster saw may be necessary to reduce the
risk of binding, stalling or a change in conditions during
longer cutting times. Interruption of cutting speeds or a
loss of power during a felling or limbing operation can
result in an inability to control the fall of a tree or limb, and
can lead to serious or fatal personal injury.
￭ Before starting any felling, limbing, bucking or pruning
operation, fully charge your STIHL AK battery and ensure
that all cuts necessary to fell the tree or sever the limb can
be completed on a single charge.
– Fully charge the STIHL AK battery before starting
work.
– Ensure that all necessary felling or limbing cuts can
be completed using the existing charge before
starting any limbing, bucking, pruning or felling cut.
– If you have any doubt that the tree can be brought
down or the limb severed on the remaining charge,
use a more powerful chain saw or consult a tree
removal professional before starting the work.
￭ Position the chain saw in such a way that your body is
clear of the cutting attachment whenever the motor is
running. Stand to the left of the cut while bucking, outside
of the cutting plane.
8.2

Bucking

Bucking is cutting a log into sections.
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