Cleaning, Maintenance, Storage And Ordering Of Spare Parts - Ultranatura BK-100 Mode D'emploi D'origine

Anleitung_BK_100_SPK7__ 14.04.14 13:03 Seite 24
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Be sure you don t make the lower cut too deep
into the trunk. The notch (C) should be deep
enough to create a hinge (F) of sufficient width
and strength. The notch should be wide enough
to direct the fall of the tree for as long as possible.
Never walk in front of a tree that has been
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notched. Make the felling cut (D) from the other
side of the tree and 1.5 - 2.0 inches (3-5 cm)
above the edge of the notch (C).
Never saw completely through the trunk. Always
leave a hinge. The hinge guides the tree. If the
trunk is completely cut through, control over the
felling direction is lost. Insert a wedge or felling
lever in the cut well before the tree becomes
unstable and starts to move. This will prevent the
guidebar from binding in the felling cut if you have
misjudged the falling direction. Make sure no
bystanders have entered the range of the falling
tree before you push it over.
Before making the final cut, always recheck the
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area for bystanders, animals or obstacles.
Felling cut
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1. Use wooden or plastic wedges (A) to prevent
binding the bar or chain (B) in the cut. Wedges
also control felling (Fig. 13).
2. When diameter of wood being cut is greater
than the bar length, make 2 cuts as shown (Fig.
14).
As the felling cut gets close to the hinge, the tree
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should begin to fall. When tree begins to fall,
remove saw from cut, stop engine, put chain saw
down, and leave area along retreat path (Fig. 11).
Limbing
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Limbing a tree is the process of removing the
branches from a fallen tree. Do not remove
supporting limbs (A) until after the log is bucked
(cut) into lengths (Fig. 15). Branches under
tension should be cut from the bottom up to avoid
binding the chain saw.
Never cut tree limbs while standing on tree trunk.
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Bucking
n
Bucking is cutting a fallen log into lengths. Make
sure you have a good footing and stand uphill of
the log when cutting on sloping ground. If
possible, the log should be supported so that the
end to be cut off is not resting on the ground. If
the log is supported at both ends and you must
cut in the middle, make a downward cut halfway
through the log and then make the undercut. This
will prevent the log from pinching the bar and
chain. Be careful that the chain does not cut into
the ground when bucking as this causes rapid
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dulling of the chain. When bucking on a slope,
always stand on the uphill side.
1. Log supported along entire length: Cut from
top (overbuck), being careful to avoid cutting into
the ground (Fig. 16A).
2. Log supported on 1 end: First, cut from
bottom (underbuck) 1/3 diameter of log to avoid
splintering. Second, cut from above (overbuck) to
meet first cut and avoid pinching (Fig. 16B).
3. Log supported on both ends: First, overbuck
1/3 diameter of log to avoid splintering. Second,
underbuck to meet first cut and avoid pinching
(Fig. 16C).
The best way to hold a log while bucking is to use
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a sawhorse. When this is not possible, the log
should be raised and supported by the limb
stumps or by using supporting logs. Be sure the
log being cut is securely supported.
Bucking using a sawhorse (Fig. 17)
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For personal safety and ease of cutting, the
correct position for vertical bucking is essential
(Fig. 17).
A. Hold the saw firmly with both hands and keep
the saw to the right of your body while cutting.
B. Keep the left arm as straight as possible.
C. Keep weight on both feet.
When working with the saw, always make sure
that the saw chain and chain bar are sufficiently
lubricated.
7. Cleaning, maintenance, storage and
ordering of spare parts
Disconnect the spark plug boot before doing any
cleaning and maintenance work!
7.1 Cleaning
Keep all safety devices, air vents and the motor
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housing free of dirt and dust as far as possible.
Wipe the equipment with a clean cloth or blow it
with compressed air at low pressure.
We recommend that you clean the device
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immediately each time you have finished using it.
Clean the equipment regularly with a moist cloth
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and some soft soap. Do not use cleaning agents
or solvents; these could attack the plastic parts
of the equipment. Ensure that no water can seep
into the device.
7.2 Maintenance
Warning: All maintenance work on the chainsaw
apart from the work described in this manual may only
be carried out by authorized after-sales service