Ryobi RY36CSX40B-0, MAX POWER 36В (5133004898) - Инструкция по эксплуатации - Страница 6

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Charge the battery pack in a location where the ambient 
temperature is between 10°C and 38°C.

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Store the battery pack in a location where the ambient 
temperature is between 0°C and 20°C.

INSTRUCTIONS CONCERNING THE PROPER 
TECHNIQUES 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 
means the 

fi

 bres are being pulled apart, and if you cut in this 

area, the kerf or cut tends to open as the saw goes through. 
If a log is being supported on a saw-horse and the end is 
hanging unsupported over the end, tension is created on 
the upper surface due to the weight of the overhanging log 
stretching the 

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 bres. Likewise, the underside of the log is 

compressed and the 

fi

 bres are being pushed together. If a 

cut is made in this area, the kerf tends to close up during 
the cut. This cut would pinch the blade.

PUSH AND  PULL

The reaction force is always opposite to the direction the 
chain is moving. The operator must be ready to control the 
tendency for the product to pull away and push backwards. 
The product pulls away (forward motion) when cutting on 
the bottom edge of the bar. The product pushes backwards 
(towards the operator) when cutting along the top edge.

SAW JAMMED IN THE CUT

Turn o

ff

  the product, and remove the battery pack. 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, which forces 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 saw. 
Never try to start the chainsaw when the guide bar is 
already in a cut or kerf.

SKATING/BOUNCING

When the chainsaw fails to dig in during a cut, the guide 
bar can begin hopping or dangerously skidding along the 
surface of the log or branch, possibly resulting in the loss 
of control of the chainsaw. To prevent or reduce skating or 
bouncing, always use the saw with both hands. Make sure 
that the saw chain establishes a groove for cutting.
Never cut small, 

fl

 exible branches or brushes with your 

chainsaw. Their size and 

fl

 exibility can easily cause the 

saw to bounce towards you or bind up with enough force 
to cause a kickback. The best tool for that kind of work is 
a hand saw, an axe, pruning shears, or other hand tools.

FELLING A  TREE

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 
utility line, the company should be noti

fi

 ed immediately.

The chainsaw 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 starts, 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 
damaged by wind, 

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 re, lightning, etc. This is extremely 

dangerous and should only be completed by professional 
tree surgeons.

1. Notching 

undercut

Make the notch 1/3 the diameter of the tree, 
perpendicular to the direction of the fall. 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.

2. Felling-back cut

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 
the 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 chainsaw from the 
cut, stop the motor, put the chainsaw down, and use the 
retreat path planned. Be alert for falling overhead limbs and 
watch your footing.

1

3

2

5 cm (2 inch)

5 cm (2 inch)

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