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Before cutting the tree down decide on the felling
direction (C). Consider the center of gravity of the tree crown,
the natural slope of the tree, the location of larger branches,
neighbouring trees, slope direction, tree health, and wind
direction to assess the tree's direction of fall. On this side the
kerf is cut in.
If two or more persons are cutting and felling at the
same time, the distance between the persons felling and
cutting should be at least twice the height of the tree to be
felled. When cutting trees, care must be taken not to expose
others to danger, hit utility lines, or cause property damage.
Should a tree come in contact with a utility line, the utility
company should be notified immediately.
Remove interfering branches, scrub and obstacles from the
working area at the trunk and make sure that you have a
safe standing position.
Thoroughly clean the trunk foot – sand, stones and other
foreign objects make the saw chain edgeless or may
damage it.
Consider the state of health of the tree – be careful with
trunks with damages or deadwood (droughty, rotten or dead
wood).
Chopping a tree
Cut a kerf with the saw of approximately one third of the tree
diameter into the trunk. First of all place the horizontal cut
and then as secondly a cut from top in an angle of 45°.
Shout the warning "Caution" or "Tree is falling" before
starting the fell cut.
Now saw on the opposite side of the trunk a horizontal
chopping cut. This cut should be placed a bit higher (appr. 4
cm) than the horizontal cut of the kerf.
By no means cut through the trunk. A ridge appr. 1/10 of the
trunk diameter must remain.
As the felling cut approaches the ridge, the tree should
begin to fall. Interrupt the felling cut if it becomes apparent
that the tree may not fall in the desired direction or may lean
back and jam the saw chain. Use wooden, plastic, or
aluminium wedges to open the felling cut and move the tree
to the desired fall line.
If the tree begins to fall, immediately remove the chainsaw
from the cut, turn it off, put it down, and leave the danger
area via the planned escape route. Watch out for falling
branches and do not trip.
Maintenance and cleaning
Before each maintenance and cleaning work
switch off device
wait for stop of chain saw
pull out main plug
Further maintenance and cleaning works than described in this
chapter shall only be carried out by the manufacturer or
companies named by the manufacturer.
For maintaining and cleaning, removed security devices must
unconditionally be mounted properly and proved again.
Use only original parts. Other parts can result in unexpected
damages and injuries. The manufacturer is not liable for any
damage or injury resulting from such action.
Maintenance
In order to avoid possible injuries wear gloves.
To guarantee a long and reliable usage of the chain saw carry
out the following maintenance works regularly.
Check the chain saw for
loose or damaged saw chain
wear, especially chain, guide bar and chain wheel
worn or damaged components
correct assembly and faultless covers and protective
devices.
Necessary repair works or maintenance have to be carried out
before using the chain saw.
Saw chain and guide bar
Saw chain and guide bar are exposed to a great extent of
wearing. Replace the saw chain and the guide bar without
any delay if their proper function is no longer ensured.
Installing the guide bar and the saw chain
"
Sharpening of saw chain
You can only work safely and well with a sharp
and clean saw chain. Damaged or incorrectly
sharpened saw chains increase the risk of
kickbacks.
The saw chain has to be sharpened if
instead of wood shavings only saw dust is ejected
you have to press the power pruner through the wood during
cutting
For sharpening a saw chain some expertise is necessary.
The saw chain must be regrinded in a specialised shop.
You can also sharpen your saw chain yourself by using our
electric sharpener KSG 220 A (article-no.: 302360).
Saw chain type
Depth limiter distance T
Sharpening angle α
Breast angleβ
Clearing angle
Chain wheel
The demand of the chain wheel (8) is particularly great. Check
regularly the teeth of the chain wheel for wear or damages.
A worn or damaged chain wheel reduces the durability
of the saw chain and should therefore immediately be
exchanged by the customer service.
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Oregon 91PJ 052X
0.64 mm (.025")
30°
85°
90°
25
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