Ryobi RCS3835T 5133002386 - Инструкция по эксплуатации - Страница 8

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| English

motion) when cutting on the bottom edge of the bar and the 
push backwards (towards the operator) when cutting along 
the top edge.

SAW JAMMED IN THE CUT

Stop the product and make it safe. Do not try to force the 
chain and bar out of the cut as this is likely to break the 
chain which may swing back and strike the operator. This 
situation normally occurs because the wood is incorrectly 
supported and forcing the cut to close under compression 
thereby pinching the blade. If adjusting the support does 
not release the bar and chain, use wooden wedges or a 
lever to open the cut and release the product. Never try 
to start the product when the guide bar is already in a cut 
or kerf.

INSTRUCTIONS CONCERNING THE PROPER TECH-
NIQUES FOR BASIC FELLING, LIMBING, AND CROSS-
CUTTING

Understanding the forces within the wood

When you understand the directional pressures and 
stresses inside the wood you can reduce the “pinches” or at 
least expect them during your cutting. Tension in the wood 

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this area the “kerf” or cut will tend to open as the product 
goes through. If a log is being supported on a saw horse 
and the end is hanging unsupported over the end then 
tension is created on the upper surface due to the weight 

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are being pushed together. If a cut is made in this area the 
kerf will have the tendency to close up during the cut. This 
would pinch the blade.

Felling a tree

See page 277 - 278.

When bucking and felling operations are being performed 
by two or more persons at the same time, the felling 
operations should be separated from the bucking operation 
by a distance of at least twice the height of the tree being 
felled. Trees should not be felled in a manner that would 
endanger any person, strike any utility line or cause any 
property damage. If the tree does make contact with any 

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The chain saw operator should keep on the uphill side of 
the terrain as the tree is likely to roll or slide downhill after 
it is felled.
An escape path should be planned and cleared as 
necessary before cuts are started. The escape path should 
extend back and diagonally to the rear of the expected line 
of fall.
Before felling is started, consider the natural lean of the 
tree, the location of larger branches and the wind direction 
to judge which way the tree will fall.
Remove dirt, stones, loose bark, nails, staples and wire 
from the tree.
Do not attempt to fell trees which are rotten or have been 

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dangerous and should only be completed by professional 
tree surgeons.

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Notching undercut

See page

 277 - 278

.

Make the notch 1/3 the diameter of the tree, 
perpendicular to the direction of falls. Make the lower 
horizontal notching cut first. This will help to avoid 
pinching either the saw chain or the guide bar when the 
second notch is being made.

Ŷ

Felling back cut

See page 

277 - 278

.

Make the felling back cut at least 50 mm/2 in higher 
than the horizontal notching cut. Keep the felling back 
cut parallel to the horizontal notching cut. Make the 
felling back cut so enough wood is left to act as a hinge. 
The hinge wood keeps the tree from twisting and falling 
in the wrong direction. Do not cut through the hinge.
As the felling gets close to the hinge, the tree should 
begin to fall. If there is any chance that the tree may 
not fall in desired direction or it may rock back and 
bind the saw chain, stop cutting before the felling back 
cut is complete and use wedges of wood, plastic or 
aluminium to open the cut and drop the tree along the 
desired line of fall.
When the tree begins to fall remove the product from 
the cut, stop the engine, put the product down, then use 
the retreat path planned. Be alert for overhead limbs 
falling and watch your footing.

Removing buttress roots

See page 278.

A buttress root is a large root extending from the trunk of 
the tree above the ground. Remove large buttress roots 
prior to felling. Make the horizontal cut into the buttress 

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loose section from the work area. Follow the correct tree 
felling procedure after you have removed the large buttress 
roots.

Bucking a log

See page 279.

Bucking is cutting a log into lengths. It is important to 

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distributed on both feet. When possible, the log should be 
raised and supported by the use of limbs, logs or chocks. 
Follow the simple directions for easy cutting. When the log 
is supported along its entire length, it is cut from the top 
(overbuck).
When the log is supported on one end, cut 1/3 the diameter 

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When the log is supported on both ends, cut 1/3 the 

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When bucking on a slope always stand on the uphill side 
of the log. When “cutting through”, to maintain complete 
control release the cutting pressure near the end of the cut 
without relaxing your grip on the handles of the product. 
Don’t let the chain contact the ground. After completing the 
cut, wait for the saw chain to stop before you move the 
product. Always stop the engine before moving from tree 
to tree.