Scheppach CSH2400-160E Originalbetriebsanleitung Seite 29

Operation - tips on chain saw use
m Important Notes
• Use the device exclusively for sawing wood. Do not
cut metal, plastics, masonry, building material that is
not made of wood, etc.
• Turn off the engine when the saw comes into con-
tact with a foreign object. Inspect the saw and repair
it if necessary.
• Protect the chain from dirt and sand. Even a small
amount of dirt will quickly blunt a chain and increase
the risk of kickback.
• Start by cutting a few small logs, using the exercise
to get a feel for your device before you tackle more
difficult tasks.
• Squeeze the throttle trigger and allow it to reach full
speed before you start cutting.
• Press the casing of the chain saw against the log
when you start sawing.
• Give full throttle during the entire sawing process.
• Allow the saw to work. Exert only slight downward
pressure.
• In order not to lose control of the device you should
lean towards the end of the incision so there is no
pressure on the saw.
Felling Trees – Only after appropriate training
m Caution: Watch for broken or dead branches that
could fall during sawing and cause serious injury. Do not
saw near buildings or electrical wires if you do not know
in which direction the felled tree could fall. Do not work at
night since you will not be able to see properly, or in rain,
snow or storm, as it is difficult to predict the the direction
in which the tree could fall.
• Plan your work in advance.
• The work area around the tree should be clear so
you have a firm foothold.
• The operator should always stand on the uphill side
of the terrain as the tree is expected to roll or slide
after felling.
• Check for broken or dead branches, which can fall
and cause serious injury.
The following conditions may affect the direction in which
a tree falls:
• Wind direction and speed.
• Lean of the tree. The inclination is not always visible
due to uneven or sloping terrain. Determine the lean
of the tree using a solder or a spirit level.
• Branch growth (and hence weight) on one side only.
• Surrounding trees and obstacles.
If two or more people are involved in the cutting and fel-
ling, the distance between those who are felling and cut-
ting should be at least twice the height of the tree to be
felled. When felling trees, make sure that other people
are not put at risk, that supply lines are not hit and that
no material damage is caused. If a tree comes in contact
with a supply line, the supply company has to be notified
immediately.
Look for decay and rot. If the trunk is rotted, it may
suddenly collapse and fall on you. Make sure there is
enough space for the tree to fall safely. Keep a distance
of 2 1/2 tree lengths from the nearest person or other ob-
jects. Engine noise can drown out a warning call.
Remove dirt, stones, loose bark, nails, staples, and wire
from the tree where you are going to cut.
m Keep an escape route (Fig. A)
Before felling, an escape route has to be planned and
cleared, if necessary. The escape route should lead dia-
gonally away from the back of the falling tree (Fig. A).
Item 1: Plan of emergency exits
Item 2: Position in which the tree falls
Felling of large trees - only with appropriate training
(15 cm in diameter)
Fell large trees using the notch method. Here, a wedge
is laterally cut out of the tree according to the desired
direction of fall. After a cut has been made on the case of
the other side of the tree, the tree will fall in the direction
of the wedge.
m Note: If the tree has large prop roots, they should be
removed before making the notch. If the saw is used to
remove the prop roots, the chain should not touch the
ground, to prevent it from becoming become blunt.
Undercut and felling of the tree (Fig. B-C)
• Saw a wedge with a depth of 1/3 of the tree diameter
at a right-angle to the falling direction. Make the lower
horizontal wedge cut first (Fig. B, No. 1). This will pre-
vent the saw chain or the guide bar becoming jammed
when the second wedge cut (Fig. B, No. 2) is made.
Now remove the excised wedge.
• Next, you can run the felling cut (Fig. B, Pos. 3) on the
opposite side of the tree. Do this at approximately 5 cm
above the centre of the notch. Make the dropping cut
parallel to the horizontal wedge cut. For the dropping
cut (No. 3), saw only to a depth so that a bridge (No. 4)
(holding wood) remains which can act as a hinge. The
bridge prevents the tree from turning and falling in the
wrong direction. Do not cut through the bridge.
m Note: When the dropping cut is made close to the
bridge, the tree should start falling. If it looks like the tree
may possibly not fall in the desired direction or it leans
back and traps the saw chain, stop the dropping cut and
use wedges of wood. plastic or aluminium to open the
cut and to tilt the tree into the required falling direction.
When the tree starts falling, remove the chainsaw from
the cut, turn it off, put it away and leave the danger zone
via the planned escape route. Look out for falling bran-
ches and do not trip.
• Be alert to signs that the tree is starting to fall: cracking
sounds, widening of the felling cut, or movement in the
upper branches.
• To avoid injury, do not cut down a partially felled
tree with your saw. Pay special attention to par-
tially felled trees that may be poorly supported.
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