26
Additional advices for sawing trunks
Never work alone.
Keep acoustic and visual contact to
other persons at all times to allow immediate first aid in
emergency cases.
Immediately stop the engine at imminent danger or in
emergency cases.
Never leave the saw running unattended.
Immediately stop working when you feel unwell (e.g. head-
ache, dizziness, nausea, etc.). Otherwise there is an in-
creased risk of accidents.
Make breaks when sawing so that the engine can cool
down.
Do not place a hot chain saw in dry grass or onto
inflammable objects.
Never get in contact with the running saw with metallic
fences or the ground.
Make sure that the wood is free of foreign object (stones,
nails etc).
Make sure that the wood can not turn when sawing.
Saw splintered wood with care. There is risk of injury by
wood pieces carried away.
Avoid saw backstroke by a correct guiding of the saw.
Note: „Causes and operator prevention of kickback“
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Use the claw stopper (16) for fixing the chain saw on
the wood. Use the claw stopper when sawing as lever.
Do not use the chain saw for lifting or moving of wood.
Let the chain saw work by producing a light leverage
pressure over the claw stopper. When sawing do not press
with strength.
When sawing thicker perches or trunks set back the claw
stopper (16) on a deeper point. For setting back release the
claw stopper from the wood and place it again in a deeper
position. Do not remove the saw here out of the cut.
Be careful at the end of a sawing cut. As far as the saw
leaves the wood the force of weight changes. There is risk
of accident for legs and feet.
Remove the chain saw only with running saw chain out of
the cut.
If the saw chain gets jammed in the wood, stop it
immediately. Use a wedge to free the guide bar.
Never put the trunk for sawing on the ground. Support the
trunk in such manner that the cut does not close and the
saw chain jams. Use a safe base (e.g. sawhorse). Avoid
contact to ground with the guide bar tip or saw chain.
Adapt shorter trunks before sawing and clamp them firmly.
Avoid cutting of thin bosk and lumber. The chain saw is not
suitable for those works.
Carry out longitudinal cuts with special care as the claw
stopper is not used. Avoid saw backstroke by guiding the
saw with a small angle.
When working at a slope take always the position above or
on the side of the trunk or the lying sawing material
respectively. Pay attention to rolling trunks.
Additional advices for sawing timber under
tension/release
If perches, trees or wood under tension become free of tension
by sawing extreme caution is demanded. The sawing material
can react completely uncontrolled and result in heavy injuries or
death.
Such works shall only be carried out by instructed
specialists.
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For all works set always first of all on the pressure side
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the releasing cut and then the dividing cut
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otherwise the
chain saw can jam or strike back.
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Upper side of wood under tensile stress
n
Place one cut (one third of the diameter of the trunk) from
the bottom up.
o
Then place a second cut on the same point from top which
cuts through the trunk.
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Underside of wood under tensile stress
n
Place one cut (one third of the diameter of the trunk) from
top to bottom.
o
Then place a second cut on the same point from bottom
which cuts through the trunk.
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Strong trunks and strong tension
n
Place one cut (one third of the diameter of the trunk) from
buttom up.
o
Then place a second cut with distance to the first cut from
top which cuts through the trunk.
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Cutting off of perches
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For horizontal branches without being top heavy
The branch section falls down in a controlled manner without
tipping over.
n
Set the first cut from below, approx. one third of the branch
diameter.
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The second cut is made on the same level as the first cut
or moved further toward the inside (negative breaking
step).
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Remove the remaining branch section.
Additional advices for chopping down trees
Such works shall only be carried out by instructed
specialists.
Pay attention to the length of the guide bar. Only those trees
are allowed to be cut which have a trunk diameter which is
smaller than the length of the guide bar.
